./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array12_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_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/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_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array12_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/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_7afc0dff-d930-4222-ad64-75e5f4eb75bb/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 4cd544b9fc2c4c641198812054f6f7e3a4b46d14448acc5758393bf17818405b --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:00:43,416 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:00:43,419 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:00:43,471 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:00:43,472 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:00:43,478 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:00:43,480 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:00:43,484 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:00:43,487 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:00:43,494 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:00:43,495 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:00:43,497 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:00:43,498 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:00:43,501 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:00:43,503 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:00:43,508 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:00:43,510 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:00:43,511 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:00:43,514 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:00:43,520 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:00:43,523 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:00:43,524 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:00:43,528 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:00:43,529 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:00:43,536 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:00:43,537 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:00:43,537 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:00:43,539 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:00:43,540 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:00:43,542 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:00:43,543 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:00:43,544 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:00:43,547 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:00:43,548 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:00:43,550 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:00:43,550 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:00:43,551 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:00:43,551 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:00:43,551 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:00:43,552 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:00:43,553 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:00:43,554 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:00:43,605 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:00:43,605 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:00:43,606 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:00:43,606 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:00:43,614 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:00:43,614 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:00:43,614 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:00:43,615 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:00:43,615 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:00:43,615 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:00:43,616 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:00:43,616 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:00:43,617 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:00:43,617 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:00:43,617 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:00:43,617 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:00:43,618 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:00:43,618 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:00:43,619 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:00:43,619 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:00:43,619 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:00:43,619 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:00:43,620 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:00:43,620 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:00:43,620 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:00:43,620 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:00:43,621 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:00:43,621 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:00:43,621 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:00:43,621 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:00:43,622 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:00:43,622 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:00:43,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:00:43,623 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:00:43,623 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:00:43,623 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:00:43,623 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:00:43,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:00:43,624 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:00:43,624 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:00:43,624 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:00:43,624 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_7afc0dff-d930-4222-ad64-75e5f4eb75bb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cd544b9fc2c4c641198812054f6f7e3a4b46d14448acc5758393bf17818405b [2021-11-25 19:00:43,924 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:00:43,951 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:00:43,954 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:00:43,955 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:00:43,956 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:00:43,957 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/array-patterns/array12_pattern.c [2021-11-25 19:00:44,031 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/data/605bba26a/e03147295ce940988be2b917f692dd09/FLAG31e1c715e [2021-11-25 19:00:44,483 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:00:44,483 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/sv-benchmarks/c/array-patterns/array12_pattern.c [2021-11-25 19:00:44,491 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/data/605bba26a/e03147295ce940988be2b917f692dd09/FLAG31e1c715e [2021-11-25 19:00:44,867 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/data/605bba26a/e03147295ce940988be2b917f692dd09 [2021-11-25 19:00:44,870 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:00:44,872 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:00:44,873 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:00:44,874 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:00:44,877 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:00:44,878 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:00:44" (1/1) ... [2021-11-25 19:00:44,884 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ce53eb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:00:44, skipping insertion in model container [2021-11-25 19:00:44,887 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:00:44" (1/1) ... [2021-11-25 19:00:44,895 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:00:44,916 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:00:45,120 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_7afc0dff-d930-4222-ad64-75e5f4eb75bb/sv-benchmarks/c/array-patterns/array12_pattern.c[1349,1362] [2021-11-25 19:00:45,140 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:00:45,147 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:00:45,159 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_7afc0dff-d930-4222-ad64-75e5f4eb75bb/sv-benchmarks/c/array-patterns/array12_pattern.c[1349,1362] [2021-11-25 19:00:45,170 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:00:45,184 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:00:45,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:00:45 WrapperNode [2021-11-25 19:00:45,185 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:00:45,186 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:00:45,186 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:00:45,186 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:00:45,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:00:45" (1/1) ... [2021-11-25 19:00:45,201 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:00:45" (1/1) ... [2021-11-25 19:00:45,224 INFO L137 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 90 [2021-11-25 19:00:45,224 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:00:45,225 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:00:45,225 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:00:45,225 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:00:45,233 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:00:45" (1/1) ... [2021-11-25 19:00:45,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:00:45" (1/1) ... [2021-11-25 19:00:45,236 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:00:45" (1/1) ... [2021-11-25 19:00:45,236 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:00:45" (1/1) ... [2021-11-25 19:00:45,242 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:00:45" (1/1) ... [2021-11-25 19:00:45,248 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:00:45" (1/1) ... [2021-11-25 19:00:45,249 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:00:45" (1/1) ... [2021-11-25 19:00:45,253 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:00:45,254 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:00:45,254 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:00:45,254 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:00:45,255 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:00:45" (1/1) ... [2021-11-25 19:00:45,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:00:45,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:00:45,288 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:00:45,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:00:45,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:00:45,329 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 19:00:45,329 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 19:00:45,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:00:45,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 19:00:45,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 19:00:45,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:00:45,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:00:45,330 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 19:00:45,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:00:45,395 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:00:45,397 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:00:45,711 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:00:45,792 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:00:45,792 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-25 19:00:45,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:00:45 BoogieIcfgContainer [2021-11-25 19:00:45,795 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:00:45,796 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:00:45,797 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:00:45,804 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:00:45,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:00:44" (1/3) ... [2021-11-25 19:00:45,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5daebfeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:00:45, skipping insertion in model container [2021-11-25 19:00:45,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:00:45" (2/3) ... [2021-11-25 19:00:45,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5daebfeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:00:45, skipping insertion in model container [2021-11-25 19:00:45,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:00:45" (3/3) ... [2021-11-25 19:00:45,808 INFO L111 eAbstractionObserver]: Analyzing ICFG array12_pattern.c [2021-11-25 19:00:45,817 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:00:45,817 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:00:45,888 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:00:45,899 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 19:00:45,900 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:00:45,918 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:00:45,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 19:00:45,923 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:00:45,923 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:00:45,924 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:00:45,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:00:45,929 INFO L85 PathProgramCache]: Analyzing trace with hash -345104842, now seen corresponding path program 1 times [2021-11-25 19:00:45,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:00:45,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136272548] [2021-11-25 19:00:45,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:00:45,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:00:46,059 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:00:46,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1414143684] [2021-11-25 19:00:46,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:00:46,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:00:46,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:00:46,067 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:00:46,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:00:46,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:00:46,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-25 19:00:46,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:00:46,236 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 19:00:46,237 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:00:46,237 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:00:46,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136272548] [2021-11-25 19:00:46,238 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:00:46,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414143684] [2021-11-25 19:00:46,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414143684] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:00:46,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:00:46,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:00:46,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140386333] [2021-11-25 19:00:46,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:00:46,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 19:00:46,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:00:46,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 19:00:46,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 19:00:46,287 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) 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 19:00:46,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:00:46,330 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2021-11-25 19:00:46,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 19:00:46,333 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 19:00:46,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:00:46,340 INFO L225 Difference]: With dead ends: 28 [2021-11-25 19:00:46,341 INFO L226 Difference]: Without dead ends: 18 [2021-11-25 19:00:46,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 19:00:46,349 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:00:46,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:00:46,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-25 19:00:46,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-25 19:00:46,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:00:46,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2021-11-25 19:00:46,395 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 11 [2021-11-25 19:00:46,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:00:46,398 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2021-11-25 19:00:46,398 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 19:00:46,399 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2021-11-25 19:00:46,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-25 19:00:46,402 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:00:46,402 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:00:46,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:00:46,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-25 19:00:46,627 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:00:46,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:00:46,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1899476879, now seen corresponding path program 1 times [2021-11-25 19:00:46,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:00:46,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810037062] [2021-11-25 19:00:46,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:00:46,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:00:46,643 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:00:46,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [496184736] [2021-11-25 19:00:46,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:00:46,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:00:46,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:00:46,645 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:00:46,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:00:46,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:00:46,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:00:46,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:00:46,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:00:46,907 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:00:46,907 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:00:46,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810037062] [2021-11-25 19:00:46,908 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:00:46,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496184736] [2021-11-25 19:00:46,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496184736] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:00:46,908 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:00:46,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:00:46,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626468028] [2021-11-25 19:00:46,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:00:46,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:00:46,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:00:46,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:00:46,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:00:46,911 INFO L87 Difference]: Start difference. First operand 18 states and 24 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, (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 19:00:47,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:00:47,025 INFO L93 Difference]: Finished difference Result 37 states and 49 transitions. [2021-11-25 19:00:47,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:00:47,027 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, (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 19:00:47,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:00:47,028 INFO L225 Difference]: With dead ends: 37 [2021-11-25 19:00:47,029 INFO L226 Difference]: Without dead ends: 24 [2021-11-25 19:00:47,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 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 19:00:47,032 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:00:47,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 21 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:00:47,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-25 19:00:47,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2021-11-25 19:00:47,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:00:47,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2021-11-25 19:00:47,047 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 19 [2021-11-25 19:00:47,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:00:47,047 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2021-11-25 19:00:47,048 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, (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 19:00:47,048 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2021-11-25 19:00:47,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-25 19:00:47,050 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:00:47,051 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:00:47,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:00:47,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:00:47,275 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:00:47,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:00:47,276 INFO L85 PathProgramCache]: Analyzing trace with hash 980269376, now seen corresponding path program 1 times [2021-11-25 19:00:47,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:00:47,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832124691] [2021-11-25 19:00:47,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:00:47,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:00:47,290 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:00:47,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [61885158] [2021-11-25 19:00:47,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:00:47,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:00:47,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:00:47,292 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:00:47,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 19:00:47,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:00:47,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:00:47,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:00:47,469 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:00:47,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:00:47,470 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:00:47,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832124691] [2021-11-25 19:00:47,470 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:00:47,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61885158] [2021-11-25 19:00:47,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61885158] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:00:47,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:00:47,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:00:47,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534523761] [2021-11-25 19:00:47,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:00:47,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:00:47,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:00:47,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:00:47,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:00:47,474 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 19:00:47,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:00:47,526 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2021-11-25 19:00:47,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:00:47,527 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 19:00:47,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:00:47,529 INFO L225 Difference]: With dead ends: 40 [2021-11-25 19:00:47,530 INFO L226 Difference]: Without dead ends: 24 [2021-11-25 19:00:47,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:00:47,534 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:00:47,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 30 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:00:47,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-25 19:00:47,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-25 19:00:47,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:00:47,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-11-25 19:00:47,556 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 23 [2021-11-25 19:00:47,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:00:47,556 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-11-25 19:00:47,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 19:00:47,556 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-11-25 19:00:47,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-25 19:00:47,557 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:00:47,558 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:00:47,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:00:47,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-25 19:00:47,771 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:00:47,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:00:47,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1640466973, now seen corresponding path program 1 times [2021-11-25 19:00:47,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:00:47,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3163152] [2021-11-25 19:00:47,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:00:47,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:00:47,786 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:00:47,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1459393306] [2021-11-25 19:00:47,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:00:47,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:00:47,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:00:47,787 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:00:47,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 19:00:47,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:00:47,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-25 19:00:47,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:00:48,415 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 0 case distinctions, treesize of input 90 treesize of output 85 [2021-11-25 19:00:48,435 INFO L354 Elim1Store]: treesize reduction 182, result has 0.5 percent of original size [2021-11-25 19:00:48,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 58 [2021-11-25 19:00:48,461 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:00:48,480 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 18 treesize of output 3 [2021-11-25 19:00:48,929 INFO L354 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2021-11-25 19:00:48,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 26 [2021-11-25 19:00:49,027 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:00:49,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:00:49,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 85 [2021-11-25 19:00:51,731 INFO L354 Elim1Store]: treesize reduction 104, result has 55.0 percent of original size [2021-11-25 19:00:51,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 85 treesize of output 148 [2021-11-25 19:00:52,201 INFO L244 Elim1Store]: Index analysis took 203 ms [2021-11-25 19:00:52,402 INFO L354 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2021-11-25 19:00:52,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 24 [2021-11-25 19:00:52,860 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-25 19:00:53,510 INFO L354 Elim1Store]: treesize reduction 29, result has 3.3 percent of original size [2021-11-25 19:00:53,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 26 [2021-11-25 19:00:53,662 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:00:53,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 109 [2021-11-25 19:00:55,562 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:00:55,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3163152] [2021-11-25 19:00:55,563 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:00:55,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459393306] [2021-11-25 19:00:55,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459393306] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:00:55,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [864972518] [2021-11-25 19:00:55,592 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 19:00:55,592 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:00:55,596 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:00:55,601 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:00:55,602 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:00:55,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:00:55,759 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:00:55,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 19:00:55,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:00:55,777 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 0 case distinctions, treesize of input 52 treesize of output 60 [2021-11-25 19:00:55,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:00:55,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 47 [2021-11-25 19:00:55,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 19:00:56,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 19:00:56,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:00:56,825 INFO L354 Elim1Store]: treesize reduction 84, result has 48.1 percent of original size [2021-11-25 19:00:56,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 110 [2021-11-25 19:00:57,432 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2021-11-25 19:00:57,443 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:01:00,905 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '563#(and (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (= (ite (and (<= 0 |ULTIMATE.start_main_~sum~0#1|) (<= |ULTIMATE.start_main_~sum~0#1| ~ARR_SIZE~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2021-11-25 19:01:00,906 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:01:00,907 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:01:00,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-25 19:01:00,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67811374] [2021-11-25 19:01:00,908 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-25 19:01:00,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-25 19:01:00,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:01:00,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-25 19:01:00,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1176, Unknown=0, NotChecked=0, Total=1332 [2021-11-25 19:01:00,911 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 15 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:01:01,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:01:01,527 INFO L93 Difference]: Finished difference Result 75 states and 97 transitions. [2021-11-25 19:01:01,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-25 19:01:01,528 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2021-11-25 19:01:01,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:01:01,530 INFO L225 Difference]: With dead ends: 75 [2021-11-25 19:01:01,530 INFO L226 Difference]: Without dead ends: 56 [2021-11-25 19:01:01,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=304, Invalid=2146, Unknown=0, NotChecked=0, Total=2450 [2021-11-25 19:01:01,533 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 49 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:01:01,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 104 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 167 Invalid, 0 Unknown, 69 Unchecked, 0.2s Time] [2021-11-25 19:01:01,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-25 19:01:01,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 39. [2021-11-25 19:01:01,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 19:01:01,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2021-11-25 19:01:01,548 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 25 [2021-11-25 19:01:01,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:01:01,549 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2021-11-25 19:01:01,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:01:01,549 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2021-11-25 19:01:01,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 19:01:01,550 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:01:01,550 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:01:01,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:01:01,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:01:01,759 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:01:01,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:01:01,759 INFO L85 PathProgramCache]: Analyzing trace with hash 676074943, now seen corresponding path program 2 times [2021-11-25 19:01:01,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:01:01,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745927436] [2021-11-25 19:01:01,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:01:01,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:01:01,781 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:01:01,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1688974445] [2021-11-25 19:01:01,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:01:01,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:01:01,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:01:01,783 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:01:01,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 19:01:01,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 19:01:01,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:01:01,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:01:01,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:01:01,953 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 19:01:01,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:01:02,031 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 19:01:02,031 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:01:02,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745927436] [2021-11-25 19:01:02,032 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:01:02,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688974445] [2021-11-25 19:01:02,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688974445] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:01:02,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [980563540] [2021-11-25 19:01:02,035 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 19:01:02,035 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:01:02,036 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:01:02,036 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:01:02,036 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:01:02,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:02,132 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-25 19:01:02,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 68 [2021-11-25 19:01:02,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:02,259 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:01:02,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 19:01:02,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:02,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 47 [2021-11-25 19:01:02,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:02,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:02,659 INFO L354 Elim1Store]: treesize reduction 191, result has 17.3 percent of original size [2021-11-25 19:01:02,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 351 treesize of output 354 [2021-11-25 19:01:02,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 19:01:03,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:03,332 INFO L354 Elim1Store]: treesize reduction 84, result has 48.1 percent of original size [2021-11-25 19:01:03,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 110 [2021-11-25 19:01:03,795 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 58 for LOIs [2021-11-25 19:01:03,806 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:01:06,034 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '945#(and (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (= (ite (and (<= 0 |ULTIMATE.start_main_~sum~0#1|) (<= |ULTIMATE.start_main_~sum~0#1| ~ARR_SIZE~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2021-11-25 19:01:06,034 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:01:06,034 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:01:06,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-11-25 19:01:06,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507313960] [2021-11-25 19:01:06,034 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:01:06,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 19:01:06,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:01:06,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 19:01:06,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-11-25 19:01:06,036 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 19:01:06,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:01:06,523 INFO L93 Difference]: Finished difference Result 68 states and 90 transitions. [2021-11-25 19:01:06,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 19:01:06,526 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2021-11-25 19:01:06,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:01:06,528 INFO L225 Difference]: With dead ends: 68 [2021-11-25 19:01:06,528 INFO L226 Difference]: Without dead ends: 53 [2021-11-25 19:01:06,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2021-11-25 19:01:06,530 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 13 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:01:06,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 71 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 19:01:06,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-25 19:01:06,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2021-11-25 19:01:06,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 37 states have internal predecessors, (49), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 19:01:06,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2021-11-25 19:01:06,541 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 26 [2021-11-25 19:01:06,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:01:06,542 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2021-11-25 19:01:06,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 19:01:06,542 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2021-11-25 19:01:06,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-25 19:01:06,543 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:01:06,544 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:01:06,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:01:06,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:01:06,759 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:01:06,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:01:06,759 INFO L85 PathProgramCache]: Analyzing trace with hash -182315624, now seen corresponding path program 3 times [2021-11-25 19:01:06,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:01:06,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521415038] [2021-11-25 19:01:06,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:01:06,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:01:06,773 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:01:06,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [730123967] [2021-11-25 19:01:06,774 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:01:06,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:01:06,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:01:06,776 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:01:06,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 19:01:06,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:01:06,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:01:06,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:01:06,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:01:06,931 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 19:01:06,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:01:07,022 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 19:01:07,023 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:01:07,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521415038] [2021-11-25 19:01:07,023 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:01:07,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730123967] [2021-11-25 19:01:07,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730123967] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:01:07,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [981540068] [2021-11-25 19:01:07,028 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 19:01:07,029 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:01:07,029 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:01:07,029 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:01:07,029 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:01:07,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:07,118 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:01:07,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 19:01:07,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:07,139 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 0 case distinctions, treesize of input 52 treesize of output 60 [2021-11-25 19:01:07,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:07,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 47 [2021-11-25 19:01:07,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 19:01:07,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 19:01:07,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:07,871 INFO L354 Elim1Store]: treesize reduction 84, result has 48.1 percent of original size [2021-11-25 19:01:07,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 110 [2021-11-25 19:01:08,343 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2021-11-25 19:01:08,353 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:01:10,880 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1332#(and (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (= (ite (and (<= 0 |ULTIMATE.start_main_~sum~0#1|) (<= |ULTIMATE.start_main_~sum~0#1| ~ARR_SIZE~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2021-11-25 19:01:10,880 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:01:10,880 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:01:10,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-25 19:01:10,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676298913] [2021-11-25 19:01:10,881 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:01:10,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 19:01:10,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:01:10,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 19:01:10,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-11-25 19:01:10,883 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 19:01:11,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:01:11,311 INFO L93 Difference]: Finished difference Result 76 states and 97 transitions. [2021-11-25 19:01:11,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 19:01:11,314 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 28 [2021-11-25 19:01:11,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:01:11,315 INFO L225 Difference]: With dead ends: 76 [2021-11-25 19:01:11,315 INFO L226 Difference]: Without dead ends: 58 [2021-11-25 19:01:11,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2021-11-25 19:01:11,316 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 34 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:01:11,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 56 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 19:01:11,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-25 19:01:11,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2021-11-25 19:01:11,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 38 states have internal predecessors, (50), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 19:01:11,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2021-11-25 19:01:11,326 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 28 [2021-11-25 19:01:11,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:01:11,327 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2021-11-25 19:01:11,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 19:01:11,327 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2021-11-25 19:01:11,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-25 19:01:11,328 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:01:11,328 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:01:11,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 19:01:11,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:01:11,529 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:01:11,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:01:11,530 INFO L85 PathProgramCache]: Analyzing trace with hash 2009154776, now seen corresponding path program 4 times [2021-11-25 19:01:11,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:01:11,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244935536] [2021-11-25 19:01:11,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:01:11,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:01:11,539 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:01:11,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1715641552] [2021-11-25 19:01:11,552 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:01:11,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:01:11,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:01:11,552 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:01:11,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 19:01:11,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:01:11,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:01:11,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:01:11,715 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 19:01:11,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:01:11,793 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-25 19:01:11,794 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:01:11,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244935536] [2021-11-25 19:01:11,794 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:01:11,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715641552] [2021-11-25 19:01:11,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715641552] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:01:11,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1104468530] [2021-11-25 19:01:11,798 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 19:01:11,798 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:01:11,799 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:01:11,799 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:01:11,799 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:01:11,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:11,894 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-25 19:01:11,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 68 [2021-11-25 19:01:11,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:11,970 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:01:11,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 19:01:12,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:12,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 51 [2021-11-25 19:01:12,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:12,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:12,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:12,225 INFO L354 Elim1Store]: treesize reduction 106, result has 6.2 percent of original size [2021-11-25 19:01:12,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 352 treesize of output 349 [2021-11-25 19:01:12,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 19:01:12,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:12,786 INFO L354 Elim1Store]: treesize reduction 84, result has 48.1 percent of original size [2021-11-25 19:01:12,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 110 [2021-11-25 19:01:13,219 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 58 for LOIs [2021-11-25 19:01:13,229 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:01:15,686 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1740#(and (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (= (ite (and (<= 0 |ULTIMATE.start_main_~sum~0#1|) (<= |ULTIMATE.start_main_~sum~0#1| ~ARR_SIZE~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:01:15,686 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:01:15,686 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:01:15,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-25 19:01:15,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594072478] [2021-11-25 19:01:15,687 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:01:15,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 19:01:15,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:01:15,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 19:01:15,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-11-25 19:01:15,688 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 19:01:16,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:01:16,901 INFO L93 Difference]: Finished difference Result 77 states and 98 transitions. [2021-11-25 19:01:16,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 19:01:16,902 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 30 [2021-11-25 19:01:16,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:01:16,903 INFO L225 Difference]: With dead ends: 77 [2021-11-25 19:01:16,903 INFO L226 Difference]: Without dead ends: 56 [2021-11-25 19:01:16,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2021-11-25 19:01:16,904 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 27 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:01:16,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 65 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-25 19:01:16,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-25 19:01:16,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2021-11-25 19:01:16,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 44 states have internal predecessors, (57), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 19:01:16,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2021-11-25 19:01:16,915 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 30 [2021-11-25 19:01:16,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:01:16,916 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2021-11-25 19:01:16,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 19:01:16,916 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2021-11-25 19:01:16,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-25 19:01:16,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:01:16,918 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:01:16,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 19:01:17,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:01:17,123 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:01:17,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:01:17,123 INFO L85 PathProgramCache]: Analyzing trace with hash -395185713, now seen corresponding path program 5 times [2021-11-25 19:01:17,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:01:17,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594636061] [2021-11-25 19:01:17,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:01:17,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:01:17,131 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:01:17,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1786827608] [2021-11-25 19:01:17,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:01:17,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:01:17,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:01:17,133 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:01:17,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 19:01:17,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-25 19:01:17,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:01:17,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:01:17,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:01:17,282 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 19:01:17,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:01:17,336 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 19:01:17,336 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:01:17,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594636061] [2021-11-25 19:01:17,336 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:01:17,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786827608] [2021-11-25 19:01:17,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786827608] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:01:17,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1007161934] [2021-11-25 19:01:17,339 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 19:01:17,339 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:01:17,340 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:01:17,340 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:01:17,340 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:01:17,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:17,419 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:01:17,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 19:01:17,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:17,430 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 0 case distinctions, treesize of input 52 treesize of output 60 [2021-11-25 19:01:17,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:17,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 51 [2021-11-25 19:01:17,528 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 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 19:01:17,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 19:01:18,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:18,185 INFO L354 Elim1Store]: treesize reduction 84, result has 48.1 percent of original size [2021-11-25 19:01:18,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 110 [2021-11-25 19:01:18,646 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2021-11-25 19:01:18,655 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:01:21,305 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2167#(and (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (= (ite (and (<= 0 |ULTIMATE.start_main_~sum~0#1|) (<= |ULTIMATE.start_main_~sum~0#1| ~ARR_SIZE~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2021-11-25 19:01:21,305 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:01:21,305 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:01:21,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-25 19:01:21,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339536824] [2021-11-25 19:01:21,305 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:01:21,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 19:01:21,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:01:21,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 19:01:21,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-11-25 19:01:21,311 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 19:01:21,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:01:21,431 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2021-11-25 19:01:21,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:01:21,432 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2021-11-25 19:01:21,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:01:21,433 INFO L225 Difference]: With dead ends: 64 [2021-11-25 19:01:21,433 INFO L226 Difference]: Without dead ends: 34 [2021-11-25 19:01:21,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-11-25 19:01:21,434 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 22 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:01:21,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 66 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:01:21,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-25 19:01:21,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-11-25 19:01:21,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:01:21,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-11-25 19:01:21,441 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 31 [2021-11-25 19:01:21,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:01:21,442 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-11-25 19:01:21,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 19:01:21,442 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-11-25 19:01:21,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-25 19:01:21,443 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:01:21,443 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:01:21,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 19:01:21,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-25 19:01:21,658 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:01:21,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:01:21,659 INFO L85 PathProgramCache]: Analyzing trace with hash -944111439, now seen corresponding path program 6 times [2021-11-25 19:01:21,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:01:21,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472327755] [2021-11-25 19:01:21,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:01:21,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:01:21,668 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:01:21,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1674403048] [2021-11-25 19:01:21,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:01:21,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:01:21,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:01:21,673 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:01:21,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 19:01:22,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:01:22,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:01:22,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-25 19:01:22,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:01:22,339 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 0 case distinctions, treesize of input 62 treesize of output 57 [2021-11-25 19:01:22,345 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 20 treesize of output 19 [2021-11-25 19:01:22,355 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 22 treesize of output 21 [2021-11-25 19:01:22,451 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 0 case distinctions, treesize of input 73 treesize of output 66 [2021-11-25 19:01:22,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:22,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:22,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:22,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 89 [2021-11-25 19:01:22,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:22,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-11-25 19:01:22,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:22,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 24 [2021-11-25 19:01:22,676 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 0 case distinctions, treesize of input 101 treesize of output 92 [2021-11-25 19:01:22,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:22,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:22,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:22,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:22,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:22,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:22,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 136 [2021-11-25 19:01:22,703 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:01:22,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:22,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:22,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:22,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 46 [2021-11-25 19:01:22,829 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 0 case distinctions, treesize of input 110 treesize of output 99 [2021-11-25 19:01:22,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:22,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:22,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:22,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:22,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:22,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:22,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:22,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:22,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:22,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:22,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 159 [2021-11-25 19:01:22,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:22,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:22,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:22,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:22,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:22,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:22,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 52 [2021-11-25 19:01:23,569 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 0 case distinctions, treesize of input 133 treesize of output 120 [2021-11-25 19:01:23,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:23,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:23,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:23,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:23,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:23,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:23,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:23,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:23,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:23,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:26,015 INFO L354 Elim1Store]: treesize reduction 584, result has 33.6 percent of original size [2021-11-25 19:01:26,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 119 treesize of output 387 [2021-11-25 19:01:26,403 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:01:28,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:28,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:28,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:28,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:28,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:28,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:28,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:28,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:28,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:28,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:28,524 INFO L354 Elim1Store]: treesize reduction 30, result has 75.6 percent of original size [2021-11-25 19:01:28,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 149 treesize of output 188 [2021-11-25 19:01:43,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:43,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:43,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:43,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:43,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:43,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:43,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:43,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:43,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:43,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:43,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:43,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:43,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:43,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:43,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:43,261 INFO L354 Elim1Store]: treesize reduction 48, result has 65.5 percent of original size [2021-11-25 19:01:43,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 279 treesize of output 199 [2021-11-25 19:01:44,037 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:01:44,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:01:53,858 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:01:53,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472327755] [2021-11-25 19:01:53,858 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:01:53,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674403048] [2021-11-25 19:01:53,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674403048] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:01:53,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1691961120] [2021-11-25 19:01:53,861 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 19:01:53,861 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:01:53,862 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:01:53,862 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:01:53,862 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:01:53,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:53,935 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:01:53,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 19:01:53,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:53,948 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 0 case distinctions, treesize of input 52 treesize of output 60 [2021-11-25 19:01:54,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:54,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 51 [2021-11-25 19:01:54,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 19:01:54,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 19:01:54,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:54,705 INFO L354 Elim1Store]: treesize reduction 84, result has 48.1 percent of original size [2021-11-25 19:01:54,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 110 [2021-11-25 19:01:55,138 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2021-11-25 19:01:55,148 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:02:00,144 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2545#(and (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (= (ite (and (<= 0 |ULTIMATE.start_main_~sum~0#1|) (<= |ULTIMATE.start_main_~sum~0#1| ~ARR_SIZE~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2021-11-25 19:02:00,144 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:02:00,144 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:02:00,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-11-25 19:02:00,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597013403] [2021-11-25 19:02:00,145 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-25 19:02:00,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-25 19:02:00,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:02:00,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-25 19:02:00,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=2728, Unknown=2, NotChecked=0, Total=3080 [2021-11-25 19:02:00,148 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 28 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 24 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:02:00,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:02:00,409 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2021-11-25 19:02:00,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-25 19:02:00,410 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 24 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 35 [2021-11-25 19:02:00,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:02:00,411 INFO L225 Difference]: With dead ends: 65 [2021-11-25 19:02:00,411 INFO L226 Difference]: Without dead ends: 62 [2021-11-25 19:02:00,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=350, Invalid=2728, Unknown=2, NotChecked=0, Total=3080 [2021-11-25 19:02:00,413 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 12 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:02:00,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 135 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 140 Invalid, 0 Unknown, 203 Unchecked, 0.2s Time] [2021-11-25 19:02:00,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-25 19:02:00,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2021-11-25 19:02:00,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 47 states have internal predecessors, (60), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 19:02:00,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2021-11-25 19:02:00,437 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 35 [2021-11-25 19:02:00,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:02:00,437 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2021-11-25 19:02:00,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 24 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:02:00,438 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2021-11-25 19:02:00,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-25 19:02:00,439 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:02:00,439 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:02:00,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 19:02:00,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:02:00,647 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:02:00,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:02:00,647 INFO L85 PathProgramCache]: Analyzing trace with hash 788260017, now seen corresponding path program 7 times [2021-11-25 19:02:00,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:02:00,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877692182] [2021-11-25 19:02:00,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:02:00,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:02:00,656 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:02:00,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1546331578] [2021-11-25 19:02:00,657 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:02:00,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:02:00,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:02:00,675 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:02:00,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 19:02:00,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:02:00,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:02:00,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:02:00,839 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 19:02:00,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:02:00,931 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 19:02:00,931 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:02:00,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877692182] [2021-11-25 19:02:00,931 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:02:00,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546331578] [2021-11-25 19:02:00,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546331578] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:02:00,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1143874194] [2021-11-25 19:02:00,934 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 19:02:00,934 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:02:00,934 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:02:00,934 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:02:00,935 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:02:00,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:01,002 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:02:01,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 19:02:01,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:01,015 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 0 case distinctions, treesize of input 52 treesize of output 60 [2021-11-25 19:02:01,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:01,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 47 [2021-11-25 19:02:01,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:01,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:02:01,324 INFO L354 Elim1Store]: treesize reduction 191, result has 17.3 percent of original size [2021-11-25 19:02:01,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 351 treesize of output 354 [2021-11-25 19:02:01,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 19:02:01,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:01,676 INFO L354 Elim1Store]: treesize reduction 84, result has 48.1 percent of original size [2021-11-25 19:02:01,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 110 [2021-11-25 19:02:01,904 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2021-11-25 19:02:01,907 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:02:03,533 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2988#(and (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (= (ite (and (<= 0 |ULTIMATE.start_main_~sum~0#1|) (<= |ULTIMATE.start_main_~sum~0#1| ~ARR_SIZE~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2021-11-25 19:02:03,533 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:02:03,534 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:02:03,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-25 19:02:03,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119528449] [2021-11-25 19:02:03,534 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:02:03,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 19:02:03,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:02:03,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 19:02:03,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-11-25 19:02:03,536 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 19:02:04,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:02:04,006 INFO L93 Difference]: Finished difference Result 120 states and 153 transitions. [2021-11-25 19:02:04,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 19:02:04,007 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-11-25 19:02:04,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:02:04,008 INFO L225 Difference]: With dead ends: 120 [2021-11-25 19:02:04,008 INFO L226 Difference]: Without dead ends: 96 [2021-11-25 19:02:04,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2021-11-25 19:02:04,009 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 90 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:02:04,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 54 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 19:02:04,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-25 19:02:04,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 76. [2021-11-25 19:02:04,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 64 states have (on average 1.25) internal successors, (80), 64 states have internal predecessors, (80), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-25 19:02:04,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 94 transitions. [2021-11-25 19:02:04,027 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 94 transitions. Word has length 36 [2021-11-25 19:02:04,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:02:04,027 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 94 transitions. [2021-11-25 19:02:04,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 19:02:04,028 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 94 transitions. [2021-11-25 19:02:04,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-25 19:02:04,032 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:02:04,033 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:02:04,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 19:02:04,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 19:02:04,239 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:02:04,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:02:04,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1951056432, now seen corresponding path program 8 times [2021-11-25 19:02:04,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:02:04,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767305047] [2021-11-25 19:02:04,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:02:04,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:02:04,251 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:02:04,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1622273308] [2021-11-25 19:02:04,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:02:04,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:02:04,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:02:04,252 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:02:04,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 19:02:05,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-25 19:02:05,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:02:05,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:02:05,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:02:05,783 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-25 19:02:05,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:02:05,867 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-25 19:02:05,867 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:02:05,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767305047] [2021-11-25 19:02:05,867 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:02:05,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622273308] [2021-11-25 19:02:05,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622273308] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:02:05,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1309785017] [2021-11-25 19:02:05,869 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 19:02:05,869 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:02:05,869 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:02:05,870 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:02:05,870 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:02:05,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:05,943 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:02:05,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 19:02:05,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:05,956 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 0 case distinctions, treesize of input 52 treesize of output 60 [2021-11-25 19:02:06,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:06,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 51 [2021-11-25 19:02:06,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 19:02:06,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 19:02:06,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:06,617 INFO L354 Elim1Store]: treesize reduction 84, result has 48.1 percent of original size [2021-11-25 19:02:06,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 110 [2021-11-25 19:02:06,967 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2021-11-25 19:02:06,975 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:02:09,362 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3566#(and (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (= (ite (and (<= 0 |ULTIMATE.start_main_~sum~0#1|) (<= |ULTIMATE.start_main_~sum~0#1| ~ARR_SIZE~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:02:09,362 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:02:09,362 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:02:09,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-25 19:02:09,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721040737] [2021-11-25 19:02:09,363 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:02:09,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 19:02:09,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:02:09,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 19:02:09,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-11-25 19:02:09,364 INFO L87 Difference]: Start difference. First operand 76 states and 94 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 19:02:10,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:02:10,865 INFO L93 Difference]: Finished difference Result 103 states and 123 transitions. [2021-11-25 19:02:10,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 19:02:10,866 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-11-25 19:02:10,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:02:10,867 INFO L225 Difference]: With dead ends: 103 [2021-11-25 19:02:10,867 INFO L226 Difference]: Without dead ends: 79 [2021-11-25 19:02:10,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2021-11-25 19:02:10,869 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 26 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:02:10,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 81 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-25 19:02:10,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-25 19:02:10,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2021-11-25 19:02:10,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 64 states have (on average 1.203125) internal successors, (77), 64 states have internal predecessors, (77), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-25 19:02:10,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 91 transitions. [2021-11-25 19:02:10,885 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 91 transitions. Word has length 36 [2021-11-25 19:02:10,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:02:10,886 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 91 transitions. [2021-11-25 19:02:10,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 19:02:10,886 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 91 transitions. [2021-11-25 19:02:10,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-25 19:02:10,887 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:02:10,887 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:02:10,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 19:02:11,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:02:11,093 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:02:11,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:02:11,094 INFO L85 PathProgramCache]: Analyzing trace with hash -744890248, now seen corresponding path program 9 times [2021-11-25 19:02:11,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:02:11,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107936746] [2021-11-25 19:02:11,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:02:11,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:02:11,113 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:02:11,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1272036310] [2021-11-25 19:02:11,115 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:02:11,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:02:11,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:02:11,117 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:02:11,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 19:02:11,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:02:11,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:02:11,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:02:11,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:02:11,325 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 37 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-25 19:02:11,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:02:11,416 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 33 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-25 19:02:11,416 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:02:11,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107936746] [2021-11-25 19:02:11,417 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:02:11,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272036310] [2021-11-25 19:02:11,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272036310] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:02:11,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [346841415] [2021-11-25 19:02:11,419 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 19:02:11,419 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:02:11,419 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:02:11,419 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:02:11,420 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:02:11,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:11,480 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:02:11,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 19:02:11,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:11,490 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 0 case distinctions, treesize of input 52 treesize of output 60 [2021-11-25 19:02:11,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:11,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 51 [2021-11-25 19:02:11,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 19:02:11,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 19:02:12,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:12,115 INFO L354 Elim1Store]: treesize reduction 84, result has 48.1 percent of original size [2021-11-25 19:02:12,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 110 [2021-11-25 19:02:12,498 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2021-11-25 19:02:12,506 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:02:15,162 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4135#(and (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (= (ite (and (<= 0 |ULTIMATE.start_main_~sum~0#1|) (<= |ULTIMATE.start_main_~sum~0#1| ~ARR_SIZE~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:02:15,162 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:02:15,163 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:02:15,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-25 19:02:15,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728037546] [2021-11-25 19:02:15,163 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:02:15,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 19:02:15,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:02:15,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 19:02:15,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-11-25 19:02:15,164 INFO L87 Difference]: Start difference. First operand 76 states and 91 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 19:02:15,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:02:15,327 INFO L93 Difference]: Finished difference Result 163 states and 193 transitions. [2021-11-25 19:02:15,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 19:02:15,328 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-11-25 19:02:15,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:02:15,329 INFO L225 Difference]: With dead ends: 163 [2021-11-25 19:02:15,329 INFO L226 Difference]: Without dead ends: 141 [2021-11-25 19:02:15,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2021-11-25 19:02:15,331 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 93 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:02:15,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 46 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:02:15,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-25 19:02:15,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 111. [2021-11-25 19:02:15,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 93 states have (on average 1.1935483870967742) internal successors, (111), 93 states have internal predecessors, (111), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-25 19:02:15,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 133 transitions. [2021-11-25 19:02:15,355 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 133 transitions. Word has length 39 [2021-11-25 19:02:15,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:02:15,356 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 133 transitions. [2021-11-25 19:02:15,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 19:02:15,356 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 133 transitions. [2021-11-25 19:02:15,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-25 19:02:15,357 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:02:15,357 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:02:15,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 19:02:15,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-25 19:02:15,563 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:02:15,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:02:15,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1025465669, now seen corresponding path program 10 times [2021-11-25 19:02:15,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:02:15,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56757050] [2021-11-25 19:02:15,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:02:15,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:02:15,571 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:02:15,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1243306906] [2021-11-25 19:02:15,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:02:15,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:02:15,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:02:15,574 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:02:15,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 19:02:15,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:02:15,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:02:15,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:02:15,729 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:02:15,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:02:15,844 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-25 19:02:15,844 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:02:15,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56757050] [2021-11-25 19:02:15,845 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:02:15,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243306906] [2021-11-25 19:02:15,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243306906] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:02:15,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1538877506] [2021-11-25 19:02:15,847 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 19:02:15,847 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:02:15,848 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:02:15,848 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:02:15,848 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:02:15,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:15,940 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-25 19:02:15,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 68 [2021-11-25 19:02:15,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:16,011 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:02:16,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 19:02:16,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:16,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 47 [2021-11-25 19:02:16,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:16,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:02:16,337 INFO L354 Elim1Store]: treesize reduction 191, result has 17.3 percent of original size [2021-11-25 19:02:16,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 351 treesize of output 354 [2021-11-25 19:02:16,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 19:02:16,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:16,821 INFO L354 Elim1Store]: treesize reduction 84, result has 48.1 percent of original size [2021-11-25 19:02:16,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 110 [2021-11-25 19:02:17,207 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 58 for LOIs [2021-11-25 19:02:17,215 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:02:19,294 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4878#(and (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (= (ite (and (<= 0 |ULTIMATE.start_main_~sum~0#1|) (<= |ULTIMATE.start_main_~sum~0#1| ~ARR_SIZE~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2021-11-25 19:02:19,294 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:02:19,294 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:02:19,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-11-25 19:02:19,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136858808] [2021-11-25 19:02:19,294 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:02:19,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 19:02:19,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:02:19,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 19:02:19,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=659, Unknown=0, NotChecked=0, Total=812 [2021-11-25 19:02:19,296 INFO L87 Difference]: Start difference. First operand 111 states and 133 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 19:02:19,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:02:19,541 INFO L93 Difference]: Finished difference Result 118 states and 138 transitions. [2021-11-25 19:02:19,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 19:02:19,542 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-11-25 19:02:19,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:02:19,543 INFO L225 Difference]: With dead ends: 118 [2021-11-25 19:02:19,543 INFO L226 Difference]: Without dead ends: 94 [2021-11-25 19:02:19,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=212, Invalid=910, Unknown=0, NotChecked=0, Total=1122 [2021-11-25 19:02:19,545 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 46 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:02:19,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 74 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:02:19,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-25 19:02:19,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2021-11-25 19:02:19,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 75 states have (on average 1.1866666666666668) internal successors, (89), 75 states have internal predecessors, (89), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-25 19:02:19,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 107 transitions. [2021-11-25 19:02:19,562 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 107 transitions. Word has length 39 [2021-11-25 19:02:19,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:02:19,562 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 107 transitions. [2021-11-25 19:02:19,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 19:02:19,563 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 107 transitions. [2021-11-25 19:02:19,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-25 19:02:19,564 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:02:19,564 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:02:19,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-25 19:02:19,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-25 19:02:19,778 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:02:19,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:02:19,779 INFO L85 PathProgramCache]: Analyzing trace with hash 203446095, now seen corresponding path program 11 times [2021-11-25 19:02:19,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:02:19,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880658291] [2021-11-25 19:02:19,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:02:19,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:02:19,793 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:02:19,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [910918455] [2021-11-25 19:02:19,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:02:19,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:02:19,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:02:19,799 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:02:19,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-25 19:02:20,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-25 19:02:20,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:02:20,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:02:20,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:02:20,797 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-25 19:02:20,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:02:20,892 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-25 19:02:20,892 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:02:20,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880658291] [2021-11-25 19:02:20,892 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:02:20,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910918455] [2021-11-25 19:02:20,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910918455] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:02:20,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1243970137] [2021-11-25 19:02:20,894 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 19:02:20,894 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:02:20,895 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:02:20,895 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:02:20,895 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:02:20,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:20,997 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-25 19:02:20,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 68 [2021-11-25 19:02:21,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:21,070 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:02:21,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 19:02:21,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:21,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 51 [2021-11-25 19:02:21,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 19:02:21,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 19:02:21,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:21,642 INFO L354 Elim1Store]: treesize reduction 84, result has 48.1 percent of original size [2021-11-25 19:02:21,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 110 [2021-11-25 19:02:21,954 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2021-11-25 19:02:21,969 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:02:24,259 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5501#(and (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (= (ite (and (<= 0 |ULTIMATE.start_main_~sum~0#1|) (<= |ULTIMATE.start_main_~sum~0#1| ~ARR_SIZE~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2021-11-25 19:02:24,259 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:02:24,259 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:02:24,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-11-25 19:02:24,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837891735] [2021-11-25 19:02:24,260 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:02:24,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 19:02:24,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:02:24,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 19:02:24,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2021-11-25 19:02:24,262 INFO L87 Difference]: Start difference. First operand 90 states and 107 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 19:02:24,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:02:24,618 INFO L93 Difference]: Finished difference Result 107 states and 127 transitions. [2021-11-25 19:02:24,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-25 19:02:24,619 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2021-11-25 19:02:24,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:02:24,620 INFO L225 Difference]: With dead ends: 107 [2021-11-25 19:02:24,620 INFO L226 Difference]: Without dead ends: 85 [2021-11-25 19:02:24,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=268, Invalid=1454, Unknown=0, NotChecked=0, Total=1722 [2021-11-25 19:02:24,621 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 23 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:02:24,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 52 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:02:24,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-25 19:02:24,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 77. [2021-11-25 19:02:24,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 65 states have internal predecessors, (76), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-25 19:02:24,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2021-11-25 19:02:24,635 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 39 [2021-11-25 19:02:24,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:02:24,636 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2021-11-25 19:02:24,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 19:02:24,636 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2021-11-25 19:02:24,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-25 19:02:24,637 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:02:24,637 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:02:24,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-25 19:02:24,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:02:24,839 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:02:24,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:02:24,839 INFO L85 PathProgramCache]: Analyzing trace with hash -315184175, now seen corresponding path program 1 times [2021-11-25 19:02:24,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:02:24,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405958459] [2021-11-25 19:02:24,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:02:24,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:02:24,848 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:02:24,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1237843978] [2021-11-25 19:02:24,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:02:24,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:02:24,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:02:24,858 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:02:24,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afc0dff-d930-4222-ad64-75e5f4eb75bb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-25 19:02:26,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:02:26,547 WARN L261 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 119 conjunts are in the unsatisfiable core [2021-11-25 19:02:26,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:02:26,630 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 0 case distinctions, treesize of input 62 treesize of output 57 [2021-11-25 19:02:26,636 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 20 treesize of output 19 [2021-11-25 19:02:26,644 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 22 treesize of output 21 [2021-11-25 19:02:26,720 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 0 case distinctions, treesize of input 83 treesize of output 76 [2021-11-25 19:02:26,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:26,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:26,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:02:26,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 103 [2021-11-25 19:02:26,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:26,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 28 [2021-11-25 19:02:26,942 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 0 case distinctions, treesize of input 70 treesize of output 61 [2021-11-25 19:02:26,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:26,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:26,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:26,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:26,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:26,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:26,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 82 [2021-11-25 19:02:26,966 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:02:26,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:26,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:26,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:26,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 26 [2021-11-25 19:02:27,066 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 0 case distinctions, treesize of input 87 treesize of output 76 [2021-11-25 19:02:27,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:27,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:27,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:27,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:27,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:27,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:27,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:27,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:27,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:27,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:27,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 113 [2021-11-25 19:02:27,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:27,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:27,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:27,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:27,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:27,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:27,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 29 [2021-11-25 19:02:27,709 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 0 case distinctions, treesize of input 143 treesize of output 130 [2021-11-25 19:02:27,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:27,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:27,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:27,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:27,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:27,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:27,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:27,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:27,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:27,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:27,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:29,473 INFO L354 Elim1Store]: treesize reduction 636, result has 30.8 percent of original size [2021-11-25 19:02:29,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 129 treesize of output 379 [2021-11-25 19:02:29,550 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:02:29,656 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:02:29,935 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:02:31,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:31,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:31,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:31,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:31,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:31,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:31,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:31,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:31,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:31,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:31,723 INFO L354 Elim1Store]: treesize reduction 30, result has 75.6 percent of original size [2021-11-25 19:02:31,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 339 treesize of output 362 [2021-11-25 19:02:42,807 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 0 case distinctions, treesize of input 254 treesize of output 225 [2021-11-25 19:02:42,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:42,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:42,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:42,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:42,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:42,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:42,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:42,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:42,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:42,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:02:48,594 WARN L227 SmtUtils]: Spent 5.70s on a formula simplification. DAG size of input: 202 DAG size of output: 102 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-25 19:02:48,595 INFO L354 Elim1Store]: treesize reduction 1360, result has 25.4 percent of original size [2021-11-25 19:02:48,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 224 treesize of output 585 [2021-11-25 19:02:54,097 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:02:57,134 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:02:58,471 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:02:59,292 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:03:01,163 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:03:10,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:03:10,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:03:10,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:03:10,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:03:10,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:03:10,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:03:10,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:03:10,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:03:10,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:03:10,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:03:12,459 INFO L354 Elim1Store]: treesize reduction 220, result has 52.5 percent of original size [2021-11-25 19:03:12,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 1124 treesize of output 928 [2021-11-25 19:10:27,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:10:27,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:10:27,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:10:27,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:10:27,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:10:27,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:10:27,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:10:27,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:10:27,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:10:27,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:10:27,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:10:27,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:10:27,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:10:27,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:10:28,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:10:28,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:10:28,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:10:28,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:10:28,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:10:28,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:10:28,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:10:28,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:10:28,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:10:28,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:10:28,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:10:28,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:10:28,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:10:28,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:10:28,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:10:28,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:10:32,927 INFO L354 Elim1Store]: treesize reduction 520, result has 36.1 percent of original size [2021-11-25 19:10:32,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 22 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 1138 treesize of output 1012 [2021-11-25 19:11:31,613 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:11:31,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:13:09,533 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:13:09,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405958459] [2021-11-25 19:13:09,533 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:13:09,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237843978] [2021-11-25 19:13:09,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237843978] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:13:09,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1677510220] [2021-11-25 19:13:09,535 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 19:13:09,535 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:13:09,536 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:13:09,536 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:13:09,536 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:13:09,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:13:10,046 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-25 19:13:10,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 68 [2021-11-25 19:13:10,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:13:10,599 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:13:10,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 19:13:10,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:13:10,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 47 [2021-11-25 19:13:10,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:13:10,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:13:11,336 INFO L354 Elim1Store]: treesize reduction 191, result has 17.3 percent of original size [2021-11-25 19:13:11,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 351 treesize of output 354 [2021-11-25 19:13:11,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 19:13:12,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:13:12,406 INFO L354 Elim1Store]: treesize reduction 84, result has 48.1 percent of original size [2021-11-25 19:13:12,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 110 [2021-11-25 19:13:15,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:13:15,734 INFO L244 Elim1Store]: Index analysis took 152 ms