./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ssina.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/ssina.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh --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 4c9ca6c94ff0fae82185b19014fc033eef7a37c04f3b092e10c4eebb38e41241 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 06:45:36,548 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 06:45:36,550 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 06:45:36,569 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 06:45:36,570 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 06:45:36,571 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 06:45:36,572 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 06:45:36,574 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 06:45:36,575 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 06:45:36,576 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 06:45:36,577 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 06:45:36,578 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 06:45:36,578 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 06:45:36,579 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 06:45:36,581 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 06:45:36,582 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 06:45:36,583 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 06:45:36,584 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 06:45:36,586 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 06:45:36,587 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 06:45:36,589 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 06:45:36,590 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 06:45:36,591 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 06:45:36,592 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 06:45:36,596 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 06:45:36,596 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 06:45:36,596 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 06:45:36,597 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 06:45:36,598 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 06:45:36,599 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 06:45:36,599 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 06:45:36,600 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 06:45:36,600 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 06:45:36,601 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 06:45:36,602 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 06:45:36,602 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 06:45:36,603 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 06:45:36,603 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 06:45:36,603 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 06:45:36,604 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 06:45:36,605 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 06:45:36,606 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 06:45:36,627 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 06:45:36,628 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 06:45:36,628 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 06:45:36,628 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 06:45:36,629 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 06:45:36,629 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 06:45:36,629 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 06:45:36,629 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 06:45:36,630 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 06:45:36,630 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 06:45:36,630 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 06:45:36,630 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 06:45:36,630 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 06:45:36,631 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 06:45:36,631 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 06:45:36,631 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 06:45:36,631 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 06:45:36,631 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 06:45:36,632 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 06:45:36,632 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 06:45:36,632 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 06:45:36,633 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 06:45:36,633 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 06:45:36,633 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 06:45:36,633 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 06:45:36,633 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 06:45:36,633 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 06:45:36,634 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 06:45:36,634 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 06:45:36,634 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 06:45:36,634 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 06:45:36,634 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 06:45:36,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:45:36,635 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 06:45:36,635 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 06:45:36,635 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 06:45:36,635 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 06:45:36,635 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 06:45:36,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 06:45:36,636 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 06:45:36,636 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 06:45:36,636 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4c9ca6c94ff0fae82185b19014fc033eef7a37c04f3b092e10c4eebb38e41241 [2022-12-14 06:45:36,801 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 06:45:36,817 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 06:45:36,819 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 06:45:36,820 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 06:45:36,820 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 06:45:36,821 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-fpi/ssina.c [2022-12-14 06:45:39,406 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 06:45:39,537 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 06:45:39,538 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/sv-benchmarks/c/array-fpi/ssina.c [2022-12-14 06:45:39,542 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/data/3cf2b1705/f75de11e21b441618211780c558c191c/FLAG3fb36bdad [2022-12-14 06:45:39,552 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/data/3cf2b1705/f75de11e21b441618211780c558c191c [2022-12-14 06:45:39,554 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 06:45:39,555 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 06:45:39,556 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 06:45:39,556 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 06:45:39,559 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 06:45:39,559 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:45:39" (1/1) ... [2022-12-14 06:45:39,560 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b2cc560 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:45:39, skipping insertion in model container [2022-12-14 06:45:39,560 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:45:39" (1/1) ... [2022-12-14 06:45:39,565 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 06:45:39,576 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:45:39,680 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/sv-benchmarks/c/array-fpi/ssina.c[588,601] [2022-12-14 06:45:39,695 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:45:39,702 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 06:45:39,712 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/sv-benchmarks/c/array-fpi/ssina.c[588,601] [2022-12-14 06:45:39,718 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:45:39,728 INFO L208 MainTranslator]: Completed translation [2022-12-14 06:45:39,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:45:39 WrapperNode [2022-12-14 06:45:39,729 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 06:45:39,730 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 06:45:39,730 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 06:45:39,730 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 06:45:39,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:45:39" (1/1) ... [2022-12-14 06:45:39,741 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:45:39" (1/1) ... [2022-12-14 06:45:39,755 INFO L138 Inliner]: procedures = 17, calls = 37, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 119 [2022-12-14 06:45:39,755 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 06:45:39,756 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 06:45:39,756 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 06:45:39,756 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 06:45:39,763 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:45:39" (1/1) ... [2022-12-14 06:45:39,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:45:39" (1/1) ... [2022-12-14 06:45:39,765 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:45:39" (1/1) ... [2022-12-14 06:45:39,765 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:45:39" (1/1) ... [2022-12-14 06:45:39,769 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:45:39" (1/1) ... [2022-12-14 06:45:39,772 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:45:39" (1/1) ... [2022-12-14 06:45:39,773 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:45:39" (1/1) ... [2022-12-14 06:45:39,774 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:45:39" (1/1) ... [2022-12-14 06:45:39,775 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 06:45:39,776 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 06:45:39,776 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 06:45:39,776 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 06:45:39,777 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:45:39" (1/1) ... [2022-12-14 06:45:39,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:45:39,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:45:39,804 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 06:45:39,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 06:45:39,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 06:45:39,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 06:45:39,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 06:45:39,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 06:45:39,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 06:45:39,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 06:45:39,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 06:45:39,838 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 06:45:39,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 06:45:39,899 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 06:45:39,901 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 06:45:40,051 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 06:45:40,111 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 06:45:40,111 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-14 06:45:40,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:45:40 BoogieIcfgContainer [2022-12-14 06:45:40,114 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 06:45:40,117 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 06:45:40,117 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 06:45:40,120 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 06:45:40,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 06:45:39" (1/3) ... [2022-12-14 06:45:40,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cc7f44f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:45:40, skipping insertion in model container [2022-12-14 06:45:40,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:45:39" (2/3) ... [2022-12-14 06:45:40,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cc7f44f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:45:40, skipping insertion in model container [2022-12-14 06:45:40,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:45:40" (3/3) ... [2022-12-14 06:45:40,123 INFO L112 eAbstractionObserver]: Analyzing ICFG ssina.c [2022-12-14 06:45:40,145 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 06:45:40,145 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 06:45:40,186 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 06:45:40,192 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@41ad48a7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 06:45:40,192 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 06:45:40,196 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:45:40,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 06:45:40,201 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:45:40,201 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:45:40,202 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:45:40,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:45:40,208 INFO L85 PathProgramCache]: Analyzing trace with hash 718799361, now seen corresponding path program 1 times [2022-12-14 06:45:40,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:45:40,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853281636] [2022-12-14 06:45:40,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:45:40,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:45:40,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:45:40,361 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:45:40,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853281636] [2022-12-14 06:45:40,362 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-14 06:45:40,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527410688] [2022-12-14 06:45:40,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:45:40,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:45:40,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:45:40,375 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:45:40,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 06:45:40,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:45:40,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 06:45:40,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:45:40,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:45:40,521 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:45:40,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527410688] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:45:40,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:45:40,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:45:40,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852244331] [2022-12-14 06:45:40,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:45:40,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:45:40,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:45:40,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:45:40,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:45:40,556 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:45:40,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:45:40,611 INFO L93 Difference]: Finished difference Result 26 states and 39 transitions. [2022-12-14 06:45:40,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:45:40,613 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 06:45:40,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:45:40,618 INFO L225 Difference]: With dead ends: 26 [2022-12-14 06:45:40,618 INFO L226 Difference]: Without dead ends: 13 [2022-12-14 06:45:40,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:45:40,622 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:45:40,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:45:40,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-12-14 06:45:40,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-12-14 06:45:40,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:45:40,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 18 transitions. [2022-12-14 06:45:40,645 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 18 transitions. Word has length 10 [2022-12-14 06:45:40,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:45:40,646 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 18 transitions. [2022-12-14 06:45:40,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:45:40,646 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 18 transitions. [2022-12-14 06:45:40,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 06:45:40,646 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:45:40,647 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:45:40,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 06:45:40,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:45:40,849 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:45:40,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:45:40,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1166592007, now seen corresponding path program 1 times [2022-12-14 06:45:40,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:45:40,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061707286] [2022-12-14 06:45:40,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:45:40,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:45:40,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:45:40,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:45:40,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061707286] [2022-12-14 06:45:40,980 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-14 06:45:40,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286808172] [2022-12-14 06:45:40,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:45:40,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:45:40,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:45:40,984 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:45:40,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 06:45:41,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:45:41,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 06:45:41,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:45:41,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 06:45:41,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:45:41,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286808172] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:45:41,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:45:41,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:45:41,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607680308] [2022-12-14 06:45:41,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:45:41,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:45:41,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:45:41,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:45:41,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:45:41,080 INFO L87 Difference]: Start difference. First operand 13 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:45:41,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:45:41,117 INFO L93 Difference]: Finished difference Result 30 states and 42 transitions. [2022-12-14 06:45:41,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:45:41,117 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 06:45:41,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:45:41,118 INFO L225 Difference]: With dead ends: 30 [2022-12-14 06:45:41,118 INFO L226 Difference]: Without dead ends: 22 [2022-12-14 06:45:41,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:45:41,120 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 26 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:45:41,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 6 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:45:41,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-12-14 06:45:41,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 17. [2022-12-14 06:45:41,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:45:41,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2022-12-14 06:45:41,125 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 11 [2022-12-14 06:45:41,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:45:41,125 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2022-12-14 06:45:41,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:45:41,125 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2022-12-14 06:45:41,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 06:45:41,126 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:45:41,126 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:45:41,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 06:45:41,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:45:41,328 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:45:41,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:45:41,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1067586039, now seen corresponding path program 1 times [2022-12-14 06:45:41,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:45:41,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476519633] [2022-12-14 06:45:41,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:45:41,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:45:41,451 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:45:41,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1992908632] [2022-12-14 06:45:41,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:45:41,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:45:41,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:45:41,456 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:45:41,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 06:45:41,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:45:41,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 64 conjunts are in the unsatisfiable core [2022-12-14 06:45:41,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:45:41,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 06:45:41,654 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 06:45:41,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 06:45:41,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-12-14 06:45:41,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-12-14 06:45:41,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 23 [2022-12-14 06:45:41,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-12-14 06:45:41,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-12-14 06:45:42,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 37 [2022-12-14 06:45:42,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:45:42,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:45:43,126 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:45:43,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:45:43,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476519633] [2022-12-14 06:45:43,127 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:45:43,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992908632] [2022-12-14 06:45:43,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992908632] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:45:43,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1428673558] [2022-12-14 06:45:43,143 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 06:45:43,143 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:45:43,147 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:45:43,152 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:45:43,152 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:45:43,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:43,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:43,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:43,246 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-12-14 06:45:43,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-12-14 06:45:43,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:43,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:43,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-12-14 06:45:43,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:43,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-12-14 06:45:43,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:43,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:43,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 37 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 123 [2022-12-14 06:45:43,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:43,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:43,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:43,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:43,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:43,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:43,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:43,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:45:43,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:43,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:43,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:43,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:43,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:43,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:43,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:43,542 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-12-14 06:45:43,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 43 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 24 case distinctions, treesize of input 448 treesize of output 436 [2022-12-14 06:45:43,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 06:45:43,676 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 06:45:43,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 06:45:43,741 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 06:45:43,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 06:45:43,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:45:43,798 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 06:45:43,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 06:45:43,853 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 06:45:43,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 06:45:43,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 06:45:43,896 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 06:45:43,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2022-12-14 06:45:43,952 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 06:45:43,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 06:45:44,016 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 06:45:44,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 06:45:44,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:45:44,055 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 06:45:44,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-12-14 06:45:44,108 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 06:45:44,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 06:45:44,146 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:45:44,929 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '325#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0) 1) |ULTIMATE.start_main_#t~mem20#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-12-14 06:45:44,929 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:45:44,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:45:44,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-12-14 06:45:44,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623008226] [2022-12-14 06:45:44,929 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 06:45:44,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 06:45:44,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:45:44,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 06:45:44,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2022-12-14 06:45:44,933 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 26 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:45:49,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:45:49,551 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2022-12-14 06:45:49,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-14 06:45:49,551 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-14 06:45:49,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:45:49,553 INFO L225 Difference]: With dead ends: 55 [2022-12-14 06:45:49,553 INFO L226 Difference]: Without dead ends: 46 [2022-12-14 06:45:49,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=204, Invalid=1776, Unknown=0, NotChecked=0, Total=1980 [2022-12-14 06:45:49,556 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 32 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 06:45:49,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 87 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 06:45:49,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-12-14 06:45:49,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 29. [2022-12-14 06:45:49,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:45:49,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2022-12-14 06:45:49,568 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 15 [2022-12-14 06:45:49,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:45:49,568 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2022-12-14 06:45:49,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:45:49,569 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2022-12-14 06:45:49,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 06:45:49,570 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:45:49,570 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:45:49,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 06:45:49,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:45:49,771 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:45:49,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:45:49,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1116341309, now seen corresponding path program 2 times [2022-12-14 06:45:49,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:45:49,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24325382] [2022-12-14 06:45:49,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:45:49,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:45:49,820 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:45:49,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [242552803] [2022-12-14 06:45:49,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:45:49,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:45:49,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:45:49,822 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:45:49,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 06:45:49,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 06:45:49,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:45:49,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 06:45:49,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:45:49,900 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 06:45:49,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:45:49,920 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 06:45:49,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:45:49,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24325382] [2022-12-14 06:45:49,921 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:45:49,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242552803] [2022-12-14 06:45:49,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242552803] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:45:49,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1778243526] [2022-12-14 06:45:49,923 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 06:45:49,924 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:45:49,924 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:45:49,924 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:45:49,924 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:45:49,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:49,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:49,995 INFO L321 Elim1Store]: treesize reduction 71, result has 30.4 percent of original size [2022-12-14 06:45:49,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 54 [2022-12-14 06:45:50,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:50,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:50,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:50,061 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-12-14 06:45:50,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-12-14 06:45:50,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:50,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-12-14 06:45:50,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:50,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:50,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 37 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 123 [2022-12-14 06:45:50,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:50,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:50,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:50,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:50,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:50,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:50,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:50,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:45:50,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:50,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:50,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:50,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:50,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:50,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:50,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:50,313 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-12-14 06:45:50,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 43 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 24 case distinctions, treesize of input 448 treesize of output 436 [2022-12-14 06:45:50,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 06:45:50,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:45:50,415 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 06:45:50,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 06:45:50,463 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 06:45:50,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 06:45:50,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:45:50,511 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 06:45:50,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-12-14 06:45:50,569 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 06:45:50,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 06:45:50,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 06:45:50,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:45:50,617 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 06:45:50,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2022-12-14 06:45:50,674 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 06:45:50,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 06:45:50,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:45:50,729 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 06:45:50,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-12-14 06:45:50,793 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 06:45:50,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 06:45:50,830 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:45:51,214 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '598#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0) 1) |ULTIMATE.start_main_#t~mem20#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-12-14 06:45:51,214 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:45:51,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:45:51,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-12-14 06:45:51,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326973281] [2022-12-14 06:45:51,214 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 06:45:51,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 06:45:51,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:45:51,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 06:45:51,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 06:45:51,216 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:45:51,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:45:51,376 INFO L93 Difference]: Finished difference Result 59 states and 77 transitions. [2022-12-14 06:45:51,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:45:51,377 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 06:45:51,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:45:51,378 INFO L225 Difference]: With dead ends: 59 [2022-12-14 06:45:51,378 INFO L226 Difference]: Without dead ends: 48 [2022-12-14 06:45:51,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 11 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-12-14 06:45:51,379 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:45:51,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 29 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:45:51,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-12-14 06:45:51,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 33. [2022-12-14 06:45:51,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.375) internal successors, (44), 32 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:45:51,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2022-12-14 06:45:51,390 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 16 [2022-12-14 06:45:51,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:45:51,391 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2022-12-14 06:45:51,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:45:51,391 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2022-12-14 06:45:51,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 06:45:51,391 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:45:51,391 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:45:51,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 06:45:51,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:45:51,592 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:45:51,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:45:51,593 INFO L85 PathProgramCache]: Analyzing trace with hash 139844905, now seen corresponding path program 3 times [2022-12-14 06:45:51,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:45:51,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405014896] [2022-12-14 06:45:51,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:45:51,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:45:51,617 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:45:51,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [437864986] [2022-12-14 06:45:51,617 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:45:51,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:45:51,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:45:51,618 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:45:51,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 06:45:51,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:45:51,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:45:51,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 06:45:51,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:45:51,694 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 06:45:51,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:45:51,718 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 06:45:51,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:45:51,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405014896] [2022-12-14 06:45:51,718 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:45:51,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437864986] [2022-12-14 06:45:51,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437864986] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:45:51,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1955232329] [2022-12-14 06:45:51,720 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 06:45:51,720 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:45:51,720 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:45:51,720 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:45:51,721 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:45:51,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:51,754 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 06:45:51,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 112 [2022-12-14 06:45:51,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:51,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:51,824 INFO L321 Elim1Store]: treesize reduction 71, result has 30.4 percent of original size [2022-12-14 06:45:51,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 54 [2022-12-14 06:45:51,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:51,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:51,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:51,903 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-12-14 06:45:51,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-12-14 06:45:51,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:51,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:51,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 37 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 123 [2022-12-14 06:45:52,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:52,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:52,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:52,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:52,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:52,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:52,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:52,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:45:52,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:52,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:52,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:52,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:52,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:52,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:52,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:52,082 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-12-14 06:45:52,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 43 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 24 case distinctions, treesize of input 448 treesize of output 436 [2022-12-14 06:45:52,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 06:45:52,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:45:52,187 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 06:45:52,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 06:45:52,238 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 06:45:52,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 06:45:52,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:45:52,278 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 06:45:52,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-12-14 06:45:52,324 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 06:45:52,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 06:45:52,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 06:45:52,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:45:52,373 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 06:45:52,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2022-12-14 06:45:52,418 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 06:45:52,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 06:45:52,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:45:52,460 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 06:45:52,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 06:45:52,503 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 06:45:52,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 06:45:52,517 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:45:52,833 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '874#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0) 1) |ULTIMATE.start_main_#t~mem20#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-12-14 06:45:52,834 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:45:52,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:45:52,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-12-14 06:45:52,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811019458] [2022-12-14 06:45:52,834 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 06:45:52,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 06:45:52,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:45:52,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 06:45:52,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 06:45:52,835 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:45:52,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:45:52,940 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2022-12-14 06:45:52,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 06:45:52,940 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-14 06:45:52,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:45:52,941 INFO L225 Difference]: With dead ends: 62 [2022-12-14 06:45:52,941 INFO L226 Difference]: Without dead ends: 32 [2022-12-14 06:45:52,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 9 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-12-14 06:45:52,942 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 23 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:45:52,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 19 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:45:52,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-12-14 06:45:52,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 22. [2022-12-14 06:45:52,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:45:52,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-12-14 06:45:52,949 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 17 [2022-12-14 06:45:52,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:45:52,949 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-12-14 06:45:52,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:45:52,949 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-12-14 06:45:52,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 06:45:52,949 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:45:52,949 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:45:52,953 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 06:45:53,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:45:53,151 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:45:53,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:45:53,152 INFO L85 PathProgramCache]: Analyzing trace with hash -706779071, now seen corresponding path program 4 times [2022-12-14 06:45:53,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:45:53,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379599383] [2022-12-14 06:45:53,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:45:53,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:45:53,206 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:45:53,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1483396184] [2022-12-14 06:45:53,207 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 06:45:53,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:45:53,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:45:53,208 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:45:53,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 06:45:53,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:45:53,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 85 conjunts are in the unsatisfiable core [2022-12-14 06:45:53,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:45:53,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 06:45:53,300 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 06:45:53,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 06:45:53,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:53,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-12-14 06:45:53,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:45:53,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:53,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-12-14 06:45:53,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:53,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2022-12-14 06:45:53,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:45:53,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:53,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 42 [2022-12-14 06:45:53,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:53,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 39 [2022-12-14 06:45:53,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:53,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 39 [2022-12-14 06:45:53,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:45:53,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:53,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 44 [2022-12-14 06:45:53,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:53,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 39 [2022-12-14 06:45:53,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:53,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 41 [2022-12-14 06:45:53,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:45:53,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 37 [2022-12-14 06:45:53,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 37 [2022-12-14 06:45:53,885 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:45:53,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:46:24,396 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:46:24,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:46:24,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379599383] [2022-12-14 06:46:24,397 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:46:24,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483396184] [2022-12-14 06:46:24,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483396184] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:46:24,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1239847135] [2022-12-14 06:46:24,398 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 06:46:24,398 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:46:24,399 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:46:24,399 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:46:24,399 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:46:24,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:46:24,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:46:24,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:46:24,475 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-12-14 06:46:24,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-12-14 06:46:24,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:46:24,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-12-14 06:46:24,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:46:24,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:46:24,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-12-14 06:46:24,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:46:24,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:46:24,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 37 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 118 [2022-12-14 06:46:24,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:46:24,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:46:24,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:46:24,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:46:24,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:46:24,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:46:24,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:46:24,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:46:24,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:46:24,669 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-12-14 06:46:24,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 35 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 25 case distinctions, treesize of input 443 treesize of output 437 [2022-12-14 06:46:24,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 06:46:24,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:46:24,787 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 06:46:24,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 06:46:24,838 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 06:46:24,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 06:46:24,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:46:24,883 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 06:46:24,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-12-14 06:46:24,940 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 06:46:24,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 06:46:24,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 06:46:24,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:46:24,982 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 06:46:24,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2022-12-14 06:46:25,031 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 06:46:25,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 06:46:25,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:46:25,073 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 06:46:25,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-12-14 06:46:25,123 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 06:46:25,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 06:46:25,152 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:46:26,147 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1174#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0) 1) |ULTIMATE.start_main_#t~mem20#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-12-14 06:46:26,147 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:46:26,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:46:26,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2022-12-14 06:46:26,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258006473] [2022-12-14 06:46:26,147 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 06:46:26,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-14 06:46:26,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:46:26,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-14 06:46:26,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1500, Unknown=4, NotChecked=0, Total=1640 [2022-12-14 06:46:26,149 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 36 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:47:01,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-12-14 06:47:02,736 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-14 06:47:14,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2022-12-14 06:47:19,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:47:19,445 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2022-12-14 06:47:19,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-14 06:47:19,445 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-12-14 06:47:19,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:47:19,446 INFO L225 Difference]: With dead ends: 73 [2022-12-14 06:47:19,446 INFO L226 Difference]: Without dead ends: 62 [2022-12-14 06:47:19,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 69.2s TimeCoverageRelationStatistics Valid=313, Invalid=3343, Unknown=4, NotChecked=0, Total=3660 [2022-12-14 06:47:19,447 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 60 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 26 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:47:19,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 116 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 681 Invalid, 1 Unknown, 0 Unchecked, 15.2s Time] [2022-12-14 06:47:19,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-12-14 06:47:19,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 39. [2022-12-14 06:47:19,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:47:19,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2022-12-14 06:47:19,458 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 20 [2022-12-14 06:47:19,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:47:19,458 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2022-12-14 06:47:19,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:47:19,458 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2022-12-14 06:47:19,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 06:47:19,458 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:47:19,458 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:47:19,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 06:47:19,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 06:47:19,660 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:47:19,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:47:19,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1272127801, now seen corresponding path program 5 times [2022-12-14 06:47:19,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:47:19,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925924115] [2022-12-14 06:47:19,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:47:19,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:47:19,714 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:47:19,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [85128965] [2022-12-14 06:47:19,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:47:19,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:47:19,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:47:19,716 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:47:19,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 06:47:19,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 06:47:19,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:47:19,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 06:47:19,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:47:19,851 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 06:47:19,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:47:19,884 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 06:47:19,884 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:47:19,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925924115] [2022-12-14 06:47:19,885 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:47:19,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85128965] [2022-12-14 06:47:19,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85128965] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:47:19,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [609861191] [2022-12-14 06:47:19,886 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 06:47:19,886 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:47:19,886 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:47:19,886 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:47:19,886 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:47:19,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:47:19,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:47:19,954 INFO L321 Elim1Store]: treesize reduction 71, result has 30.4 percent of original size [2022-12-14 06:47:19,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 54 [2022-12-14 06:47:19,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:47:19,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:47:19,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:47:20,022 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-12-14 06:47:20,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-12-14 06:47:20,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:47:20,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-12-14 06:47:20,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:47:20,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:47:20,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 37 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 118 [2022-12-14 06:47:20,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:47:20,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:47:20,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:47:20,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:47:20,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:47:20,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:47:20,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:47:20,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:47:20,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:47:20,193 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-12-14 06:47:20,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 35 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 25 case distinctions, treesize of input 443 treesize of output 437 [2022-12-14 06:47:20,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 06:47:20,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:47:20,317 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 06:47:20,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 06:47:20,376 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 06:47:20,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 06:47:20,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:47:20,431 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 06:47:20,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 06:47:20,477 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 06:47:20,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 06:47:20,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 06:47:20,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:47:20,514 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 06:47:20,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 33 [2022-12-14 06:47:20,565 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 06:47:20,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 06:47:20,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:47:20,609 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 06:47:20,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 06:47:20,665 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 06:47:20,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 06:47:20,682 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:47:20,960 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1544#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0) 1) |ULTIMATE.start_main_#t~mem20#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-12-14 06:47:20,960 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:47:20,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:47:20,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-12-14 06:47:20,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141995493] [2022-12-14 06:47:20,961 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 06:47:20,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 06:47:20,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:47:20,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 06:47:20,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-12-14 06:47:20,962 INFO L87 Difference]: Start difference. First operand 39 states and 51 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:47:21,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:47:21,202 INFO L93 Difference]: Finished difference Result 83 states and 102 transitions. [2022-12-14 06:47:21,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 06:47:21,202 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-14 06:47:21,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:47:21,203 INFO L225 Difference]: With dead ends: 83 [2022-12-14 06:47:21,203 INFO L226 Difference]: Without dead ends: 69 [2022-12-14 06:47:21,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2022-12-14 06:47:21,204 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 63 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:47:21,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 49 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:47:21,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-12-14 06:47:21,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 43. [2022-12-14 06:47:21,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 42 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:47:21,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2022-12-14 06:47:21,218 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 21 [2022-12-14 06:47:21,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:47:21,219 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2022-12-14 06:47:21,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:47:21,219 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2022-12-14 06:47:21,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 06:47:21,219 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:47:21,219 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:47:21,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 06:47:21,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:47:21,420 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:47:21,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:47:21,420 INFO L85 PathProgramCache]: Analyzing trace with hash -300753242, now seen corresponding path program 6 times [2022-12-14 06:47:21,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:47:21,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681576498] [2022-12-14 06:47:21,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:47:21,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:47:21,437 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:47:21,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1601562242] [2022-12-14 06:47:21,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:47:21,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:47:21,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:47:21,438 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:47:21,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 06:47:21,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:47:21,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:47:21,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 06:47:21,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:47:21,538 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 06:47:21,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:47:21,575 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 06:47:21,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:47:21,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681576498] [2022-12-14 06:47:21,575 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:47:21,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601562242] [2022-12-14 06:47:21,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601562242] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:47:21,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [591560104] [2022-12-14 06:47:21,577 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 06:47:21,577 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:47:21,577 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:47:21,578 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:47:21,578 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:47:21,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:47:21,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:47:21,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:47:21,648 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-12-14 06:47:21,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-12-14 06:47:21,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:47:21,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:47:21,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-12-14 06:47:21,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:47:21,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-12-14 06:47:21,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:47:21,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:47:21,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 37 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 123 [2022-12-14 06:47:21,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:47:21,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:47:21,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:47:21,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:47:21,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:47:21,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:47:21,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:47:21,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:47:21,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:47:21,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:47:21,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:47:21,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:47:21,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:47:21,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:47:21,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:47:21,855 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-12-14 06:47:21,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 43 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 24 case distinctions, treesize of input 448 treesize of output 436 [2022-12-14 06:47:21,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 06:47:21,947 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 06:47:21,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 06:47:22,000 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 06:47:22,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 06:47:22,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:47:22,046 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 06:47:22,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-12-14 06:47:22,100 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 06:47:22,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 06:47:22,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 06:47:22,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:47:22,152 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 06:47:22,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2022-12-14 06:47:22,207 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 06:47:22,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 06:47:22,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:47:22,257 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 06:47:22,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-12-14 06:47:22,316 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 06:47:22,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 06:47:22,347 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:47:22,933 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1917#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0) 1) |ULTIMATE.start_main_#t~mem20#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-12-14 06:47:22,933 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:47:22,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:47:22,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-12-14 06:47:22,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051391534] [2022-12-14 06:47:22,933 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 06:47:22,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 06:47:22,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:47:22,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 06:47:22,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-12-14 06:47:22,934 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:47:23,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:47:23,075 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2022-12-14 06:47:23,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 06:47:23,075 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-12-14 06:47:23,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:47:23,076 INFO L225 Difference]: With dead ends: 85 [2022-12-14 06:47:23,076 INFO L226 Difference]: Without dead ends: 61 [2022-12-14 06:47:23,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 18 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2022-12-14 06:47:23,077 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 44 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:47:23,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 32 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:47:23,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-12-14 06:47:23,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 44. [2022-12-14 06:47:23,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 43 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:47:23,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2022-12-14 06:47:23,092 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 22 [2022-12-14 06:47:23,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:47:23,092 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2022-12-14 06:47:23,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:47:23,092 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2022-12-14 06:47:23,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 06:47:23,092 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:47:23,092 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:47:23,097 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 06:47:23,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:47:23,293 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:47:23,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:47:23,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1720314290, now seen corresponding path program 1 times [2022-12-14 06:47:23,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:47:23,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62170222] [2022-12-14 06:47:23,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:47:23,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:47:23,308 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:47:23,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1846437322] [2022-12-14 06:47:23,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:47:23,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:47:23,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:47:23,310 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:47:23,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 06:47:23,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:47:23,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 72 conjunts are in the unsatisfiable core [2022-12-14 06:47:23,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:47:23,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 06:47:23,386 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 06:47:23,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:47:23,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-14 06:47:23,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-12-14 06:47:23,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:47:23,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-12-14 06:47:23,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:47:23,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:47:23,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 37 [2022-12-14 06:47:23,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:47:23,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 34 [2022-12-14 06:47:23,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2022-12-14 06:47:23,534 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 21 [2022-12-14 06:47:23,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2022-12-14 06:47:23,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:47:23,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 27 [2022-12-14 06:47:23,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:47:23,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-12-14 06:47:23,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:47:23,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 31 [2022-12-14 06:47:23,765 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:47:23,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 44 [2022-12-14 06:47:23,779 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 06:47:23,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:47:40,903 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:47:40,904 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 75 [2022-12-14 06:47:40,931 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_1 (Array Int Int)) (~N~0 Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_arrayElimArr_1))) (let ((.cse0 (+ (* 2 ~N~0) (* ~N~0 ~N~0) 1)) (.cse1 (select .cse2 |c_ULTIMATE.start_main_~a~0#1.base|))) (or (= .cse0 (+ (select .cse1 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (select (select (store .cse2 |c_ULTIMATE.start_main_~a~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~a~0#1.offset| .cse0)) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (not (= .cse0 (+ (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) (select v_arrayElimArr_1 |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))))) is different from false [2022-12-14 06:47:40,969 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_1 (Array Int Int)) (~N~0 Int)) (let ((.cse2 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse3 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse4 (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse3 .cse4 (+ (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse3 .cse4))))) |c_ULTIMATE.start_main_~#sum~0#1.base| v_arrayElimArr_1))) (let ((.cse1 (select .cse2 |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse0 (+ (* 2 ~N~0) (* ~N~0 ~N~0) 1))) (or (not (= .cse0 (+ (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) (select v_arrayElimArr_1 |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (= .cse0 (+ (select .cse1 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (select (select (store .cse2 |c_ULTIMATE.start_main_~a~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~a~0#1.offset| .cse0)) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))))) is different from false [2022-12-14 06:47:43,349 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_1 (Array Int Int)) (~N~0 Int)) (let ((.cse3 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse2 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse5 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse4 (store .cse5 |c_ULTIMATE.start_main_~a~0#1.offset| (+ (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse5 |c_ULTIMATE.start_main_~a~0#1.offset|))))) (store .cse4 .cse3 (+ (select .cse5 .cse3) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse4) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))) |c_ULTIMATE.start_main_~#sum~0#1.base| v_arrayElimArr_1))) (let ((.cse1 (select .cse2 |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse0 (+ (* 2 ~N~0) (* ~N~0 ~N~0) 1))) (or (not (= .cse0 (+ (select v_arrayElimArr_1 |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (= (+ (select (select (store .cse2 |c_ULTIMATE.start_main_~a~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~a~0#1.offset| .cse0)) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse1 .cse3)) .cse0)))))) is different from false [2022-12-14 06:47:59,067 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:47:59,067 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 417 treesize of output 339 [2022-12-14 06:47:59,088 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_2 (Array Int Int)) (v_arrayElimArr_1 (Array Int Int)) (~N~0 Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (let ((.cse3 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse1 (store (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_arrayElimArr_2))) (store .cse4 |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse6 (select .cse4 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse5 (store .cse6 |c_ULTIMATE.start_main_~a~0#1.offset| (+ (select .cse6 |c_ULTIMATE.start_main_~a~0#1.offset|) (select v_arrayElimArr_2 |ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse5 .cse3 (+ (select .cse6 .cse3) (select (select (store .cse4 |c_ULTIMATE.start_main_~a~0#1.base| .cse5) |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|))))))) |c_ULTIMATE.start_main_~#sum~0#1.base| v_arrayElimArr_1))) (let ((.cse0 (+ (* 2 ~N~0) (* ~N~0 ~N~0) 1)) (.cse2 (select .cse1 |c_ULTIMATE.start_main_~a~0#1.base|))) (or (= .cse0 (+ (select (select (store .cse1 |c_ULTIMATE.start_main_~a~0#1.base| (store .cse2 |c_ULTIMATE.start_main_~a~0#1.offset| .cse0)) |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse2 .cse3))) (not (= .cse0 (+ (select .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|) (select v_arrayElimArr_1 |ULTIMATE.start_main_~#sum~0#1.offset|))))))))) is different from false [2022-12-14 06:47:59,134 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_2 (Array Int Int)) (v_arrayElimArr_1 (Array Int Int)) (~N~0 Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (let ((.cse3 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse2 (store (let ((.cse4 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1)) |c_ULTIMATE.start_main_~#sum~0#1.base| v_arrayElimArr_2))) (store .cse4 |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse6 (select .cse4 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse5 (store .cse6 |c_ULTIMATE.start_main_~a~0#1.offset| (+ (select .cse6 |c_ULTIMATE.start_main_~a~0#1.offset|) (select v_arrayElimArr_2 |ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse5 .cse3 (+ (select (select (store .cse4 |c_ULTIMATE.start_main_~a~0#1.base| .cse5) |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse6 .cse3))))))) |c_ULTIMATE.start_main_~#sum~0#1.base| v_arrayElimArr_1))) (let ((.cse0 (+ (* 2 ~N~0) (* ~N~0 ~N~0) 1)) (.cse1 (select .cse2 |c_ULTIMATE.start_main_~a~0#1.base|))) (or (not (= .cse0 (+ (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) (select v_arrayElimArr_1 |ULTIMATE.start_main_~#sum~0#1.offset|)))) (= .cse0 (+ (select (select (store .cse2 |c_ULTIMATE.start_main_~a~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~a~0#1.offset| .cse0)) |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse1 .cse3)))))))) is different from false [2022-12-14 06:47:59,164 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:47:59,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 909 treesize of output 374 [2022-12-14 06:47:59,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 715 treesize of output 677 [2022-12-14 06:47:59,371 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:47:59,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 1469 treesize of output 1287 [2022-12-14 06:47:59,433 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:47:59,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 5038 treesize of output 4062 [2022-12-14 06:47:59,528 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:47:59,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 4058 treesize of output 4020 [2022-12-14 06:48:00,168 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 11 not checked. [2022-12-14 06:48:00,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:48:00,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62170222] [2022-12-14 06:48:00,168 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:48:00,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846437322] [2022-12-14 06:48:00,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846437322] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:48:00,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2139208814] [2022-12-14 06:48:00,169 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 06:48:00,169 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:48:00,169 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:48:00,170 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:48:00,170 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:48:00,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:48:00,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:48:00,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:48:00,249 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-12-14 06:48:00,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-12-14 06:48:00,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:48:00,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-12-14 06:48:00,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:48:00,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:48:00,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-12-14 06:48:00,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:48:00,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:48:00,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 37 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 123 [2022-12-14 06:48:00,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:48:00,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:48:00,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:48:00,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:48:00,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:48:00,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:48:00,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:48:00,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:48:00,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:48:00,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:48:00,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:48:00,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:48:00,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:48:00,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:48:00,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:48:00,468 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-12-14 06:48:00,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 43 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 24 case distinctions, treesize of input 448 treesize of output 436 [2022-12-14 06:48:00,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 06:48:00,549 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 06:48:00,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 06:48:00,603 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 06:48:00,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 06:48:00,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:48:00,667 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 06:48:00,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-12-14 06:48:00,726 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 06:48:00,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 06:48:00,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 06:48:00,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:48:00,773 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 06:48:00,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 33 [2022-12-14 06:48:00,828 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 06:48:00,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 06:48:00,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:48:00,872 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 06:48:00,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 06:48:00,923 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 06:48:00,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 06:48:01,032 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:48:02,071 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2315#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 06:48:02,071 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:48:02,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:48:02,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 35 [2022-12-14 06:48:02,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702984927] [2022-12-14 06:48:02,071 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 06:48:02,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 06:48:02,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:48:02,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 06:48:02,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1009, Unknown=44, NotChecked=350, Total=1560 [2022-12-14 06:48:02,073 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 35 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:48:18,858 WARN L233 SmtUtils]: Spent 14.16s on a formula simplification. DAG size of input: 99 DAG size of output: 95 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:48:20,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-14 06:48:23,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-14 06:48:25,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-14 06:48:27,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-14 06:48:29,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-14 06:48:31,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-14 06:48:33,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-14 06:48:35,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-14 06:48:37,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-14 06:48:39,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-14 06:48:41,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-14 06:48:53,850 WARN L233 SmtUtils]: Spent 5.02s on a formula simplification. DAG size of input: 93 DAG size of output: 70 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:49:03,345 WARN L233 SmtUtils]: Spent 8.35s on a formula simplification. DAG size of input: 101 DAG size of output: 86 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:49:13,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:49:13,668 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2022-12-14 06:49:13,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 06:49:13,669 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-12-14 06:49:13,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:49:13,670 INFO L225 Difference]: With dead ends: 47 [2022-12-14 06:49:13,670 INFO L226 Difference]: Without dead ends: 28 [2022-12-14 06:49:13,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 12 SemanticMatches, 47 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 82.6s TimeCoverageRelationStatistics Valid=283, Invalid=1573, Unknown=56, NotChecked=440, Total=2352 [2022-12-14 06:49:13,671 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 24 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 29 mSolverCounterUnsat, 26 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 26 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 25.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:49:13,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 49 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 316 Invalid, 26 Unknown, 142 Unchecked, 25.4s Time] [2022-12-14 06:49:13,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-12-14 06:49:13,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-12-14 06:49:13,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:49:13,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-12-14 06:49:13,680 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 23 [2022-12-14 06:49:13,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:49:13,680 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-12-14 06:49:13,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:49:13,681 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-12-14 06:49:13,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 06:49:13,681 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:49:13,681 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:49:13,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 06:49:13,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-14 06:49:13,883 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:49:13,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:49:13,884 INFO L85 PathProgramCache]: Analyzing trace with hash 445363657, now seen corresponding path program 7 times [2022-12-14 06:49:13,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:49:13,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382295690] [2022-12-14 06:49:13,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:49:13,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:49:13,905 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:49:13,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [969665936] [2022-12-14 06:49:13,906 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 06:49:13,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:49:13,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:49:13,907 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:49:13,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 06:49:13,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:49:13,996 WARN L261 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 113 conjunts are in the unsatisfiable core [2022-12-14 06:49:14,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:49:14,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 06:49:14,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 06:49:14,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-12-14 06:49:14,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-12-14 06:49:14,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:49:14,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:49:14,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-12-14 06:49:14,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:49:14,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:49:14,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 47 [2022-12-14 06:49:15,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:49:15,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:49:15,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 47 [2022-12-14 06:49:15,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:49:15,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:49:15,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 49 [2022-12-14 06:49:15,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:49:15,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:49:15,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 49 [2022-12-14 06:49:16,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:49:16,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:49:16,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:49:16,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:49:16,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:49:16,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 50 [2022-12-14 06:49:16,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:49:16,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:49:16,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 49 [2022-12-14 06:49:16,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:49:16,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:49:16,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 45 [2022-12-14 06:49:16,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:49:16,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:49:16,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:49:16,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 52 [2022-12-14 06:49:17,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:49:17,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:49:17,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:49:17,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 55 [2022-12-14 06:49:17,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:49:17,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:49:17,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 49 [2022-12-14 06:49:18,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:49:18,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:49:18,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 49 [2022-12-14 06:49:18,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:49:18,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:49:18,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:49:18,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:49:18,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:49:18,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 48 [2022-12-14 06:49:18,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:49:18,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2022-12-14 06:49:19,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 37 [2022-12-14 06:49:19,669 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:49:19,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:51:51,655 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:51:51,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:51:51,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382295690] [2022-12-14 06:51:51,655 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:51:51,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969665936] [2022-12-14 06:51:51,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969665936] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:51:51,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [760257430] [2022-12-14 06:51:51,657 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 06:51:51,657 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:51:51,657 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:51:51,657 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:51:51,657 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:51:51,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:51,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:51,981 INFO L321 Elim1Store]: treesize reduction 71, result has 30.4 percent of original size [2022-12-14 06:51:51,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 54 [2022-12-14 06:51:52,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:52,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:52,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:52,312 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-12-14 06:51:52,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-12-14 06:51:52,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:52,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-12-14 06:51:52,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:52,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:52,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 37 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 118 [2022-12-14 06:51:52,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:52,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:52,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:52,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:52,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:52,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:52,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:51:52,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:52,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:52,741 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-12-14 06:51:52,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 35 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 25 case distinctions, treesize of input 443 treesize of output 437 [2022-12-14 06:51:52,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 06:51:53,032 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 06:51:53,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 06:51:53,284 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 06:51:53,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 06:51:53,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:53,466 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 06:51:53,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 06:51:53,697 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 06:51:53,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 06:51:53,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 06:51:53,835 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 06:51:53,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2022-12-14 06:51:54,046 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 06:51:54,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 06:51:54,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:51:54,211 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 06:51:54,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-12-14 06:51:54,456 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 06:51:54,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 06:51:54,513 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:52:07,973 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2662#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0) 1) |ULTIMATE.start_main_#t~mem20#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-12-14 06:52:07,973 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:52:07,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:52:07,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2022-12-14 06:52:07,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198210385] [2022-12-14 06:52:07,973 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 06:52:07,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-14 06:52:07,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:52:07,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-14 06:52:07,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=2353, Unknown=21, NotChecked=0, Total=2550 [2022-12-14 06:52:07,975 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 46 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:52:34,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-14 06:52:58,906 WARN L233 SmtUtils]: Spent 6.96s on a formula simplification. DAG size of input: 142 DAG size of output: 88 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:53:00,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-14 06:53:02,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-14 06:53:45,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-14 06:54:33,520 WARN L233 SmtUtils]: Spent 16.50s on a formula simplification. DAG size of input: 149 DAG size of output: 129 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:54:37,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-14 06:54:40,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-12-14 06:54:42,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-12-14 06:54:48,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-14 06:54:50,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-12-14 06:54:53,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-14 06:55:49,801 WARN L233 SmtUtils]: Spent 11.26s on a formula simplification that was a NOOP. DAG size: 151 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:55:51,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-12-14 06:55:57,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-12-14 06:56:03,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-14 06:56:55,462 WARN L233 SmtUtils]: Spent 5.95s on a formula simplification. DAG size of input: 108 DAG size of output: 107 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:57:49,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:57:49,436 INFO L93 Difference]: Finished difference Result 91 states and 112 transitions. [2022-12-14 06:57:49,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-14 06:57:49,437 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-12-14 06:57:49,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:57:49,437 INFO L225 Difference]: With dead ends: 91 [2022-12-14 06:57:49,437 INFO L226 Difference]: Without dead ends: 78 [2022-12-14 06:57:49,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 12 SyntacticMatches, 12 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1417 ImplicationChecksByTransitivity, 427.1s TimeCoverageRelationStatistics Valid=437, Invalid=5228, Unknown=35, NotChecked=0, Total=5700 [2022-12-14 06:57:49,439 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 80 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 35 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 79.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 1040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 80.6s IncrementalHoareTripleChecker+Time [2022-12-14 06:57:49,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 149 Invalid, 1040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 999 Invalid, 6 Unknown, 0 Unchecked, 80.6s Time] [2022-12-14 06:57:49,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-12-14 06:57:49,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 49. [2022-12-14 06:57:49,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 48 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:57:49,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2022-12-14 06:57:49,465 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 25 [2022-12-14 06:57:49,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:57:49,465 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2022-12-14 06:57:49,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:57:49,465 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2022-12-14 06:57:49,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 06:57:49,466 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:57:49,466 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:57:49,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 06:57:49,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 06:57:49,668 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:57:49,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:57:49,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1692492547, now seen corresponding path program 8 times [2022-12-14 06:57:49,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:57:49,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336717385] [2022-12-14 06:57:49,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:57:49,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:57:49,709 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:57:49,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1138857337] [2022-12-14 06:57:49,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:57:49,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:57:49,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:57:49,710 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:57:49,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 06:57:49,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 06:57:49,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:57:49,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 06:57:49,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:57:50,431 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 06:57:50,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:57:50,880 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 06:57:50,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:57:50,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336717385] [2022-12-14 06:57:50,880 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:57:50,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138857337] [2022-12-14 06:57:50,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138857337] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:57:50,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [724733215] [2022-12-14 06:57:50,882 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 06:57:50,882 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:57:50,882 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:57:50,882 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:57:50,882 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:57:50,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:57:51,004 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 06:57:51,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 112 [2022-12-14 06:57:51,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:57:51,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:57:51,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:57:51,470 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-12-14 06:57:51,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-12-14 06:57:51,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:57:51,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:57:51,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-12-14 06:57:51,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:57:51,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:57:51,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 37 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 118 [2022-12-14 06:57:51,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:57:51,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:57:51,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:57:51,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:57:51,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:57:51,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:57:51,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:57:51,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:57:51,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:57:51,961 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-12-14 06:57:51,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 35 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 25 case distinctions, treesize of input 443 treesize of output 437 [2022-12-14 06:57:52,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 06:57:52,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:57:52,231 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 06:57:52,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 06:57:52,503 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 06:57:52,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 06:57:52,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:57:52,685 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 06:57:52,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-12-14 06:57:52,960 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 06:57:52,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 06:57:52,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 06:57:53,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:57:53,132 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 06:57:53,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 33 [2022-12-14 06:57:53,398 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 06:57:53,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 06:57:53,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:57:53,582 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 06:57:53,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-12-14 06:57:53,850 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 06:57:53,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 06:57:53,914 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:57:55,842 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3127#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0) 1) |ULTIMATE.start_main_#t~mem20#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-12-14 06:57:55,843 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:57:55,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:57:55,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-12-14 06:57:55,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446915574] [2022-12-14 06:57:55,843 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 06:57:55,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 06:57:55,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:57:55,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 06:57:55,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-12-14 06:57:55,845 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:57:58,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:57:58,028 INFO L93 Difference]: Finished difference Result 107 states and 127 transitions. [2022-12-14 06:57:58,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 06:57:58,029 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-12-14 06:57:58,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:57:58,030 INFO L225 Difference]: With dead ends: 107 [2022-12-14 06:57:58,030 INFO L226 Difference]: Without dead ends: 90 [2022-12-14 06:57:58,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2022-12-14 06:57:58,031 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 69 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 06:57:58,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 104 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 06:57:58,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-12-14 06:57:58,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 53. [2022-12-14 06:57:58,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 52 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:57:58,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 66 transitions. [2022-12-14 06:57:58,057 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 66 transitions. Word has length 26 [2022-12-14 06:57:58,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:57:58,058 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 66 transitions. [2022-12-14 06:57:58,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:57:58,058 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 66 transitions. [2022-12-14 06:57:58,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 06:57:58,059 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:57:58,059 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:57:58,064 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 06:57:58,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:57:58,260 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:57:58,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:57:58,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1180293052, now seen corresponding path program 9 times [2022-12-14 06:57:58,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:57:58,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479042778] [2022-12-14 06:57:58,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:57:58,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:57:58,286 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:57:58,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1864296641] [2022-12-14 06:57:58,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:57:58,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:57:58,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:57:58,287 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:57:58,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 06:57:58,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:57:58,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:57:58,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 06:57:58,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:57:58,924 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 06:57:58,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:57:59,379 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 06:57:59,380 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:57:59,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479042778] [2022-12-14 06:57:59,380 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:57:59,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864296641] [2022-12-14 06:57:59,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864296641] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:57:59,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [531010743] [2022-12-14 06:57:59,382 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 06:57:59,382 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:57:59,382 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:57:59,383 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:57:59,383 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:57:59,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:57:59,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:57:59,744 INFO L321 Elim1Store]: treesize reduction 71, result has 30.4 percent of original size [2022-12-14 06:57:59,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 54 [2022-12-14 06:57:59,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:57:59,861 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 06:57:59,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 112 [2022-12-14 06:57:59,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:57:59,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:57:59,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:58:00,341 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-12-14 06:58:00,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-12-14 06:58:00,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:58:00,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:58:00,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 37 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 118 [2022-12-14 06:58:00,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:58:00,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:58:00,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:58:00,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:58:00,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:58:00,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:58:00,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:58:00,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:58:00,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:58:00,780 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-12-14 06:58:00,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 35 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 25 case distinctions, treesize of input 443 treesize of output 437 [2022-12-14 06:58:00,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 06:58:00,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:58:01,042 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 06:58:01,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 06:58:01,323 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 06:58:01,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 06:58:01,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:58:01,509 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 06:58:01,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 06:58:01,782 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 06:58:01,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 06:58:01,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 06:58:01,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:58:01,941 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 06:58:01,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 33 [2022-12-14 06:58:02,207 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 06:58:02,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 06:58:02,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:58:02,383 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 06:58:02,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-12-14 06:58:02,638 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 06:58:02,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 06:58:02,696 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:58:04,759 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3597#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0) 1) |ULTIMATE.start_main_#t~mem20#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-12-14 06:58:04,759 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:58:04,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:58:04,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-12-14 06:58:04,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319900370] [2022-12-14 06:58:04,760 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 06:58:04,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 06:58:04,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:58:04,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 06:58:04,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-12-14 06:58:04,762 INFO L87 Difference]: Start difference. First operand 53 states and 66 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:58:05,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:58:05,805 INFO L93 Difference]: Finished difference Result 108 states and 125 transitions. [2022-12-14 06:58:05,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 06:58:05,806 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-12-14 06:58:05,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:58:05,807 INFO L225 Difference]: With dead ends: 108 [2022-12-14 06:58:05,807 INFO L226 Difference]: Without dead ends: 80 [2022-12-14 06:58:05,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2022-12-14 06:58:05,808 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 91 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 06:58:05,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 47 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 06:58:05,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-12-14 06:58:05,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2022-12-14 06:58:05,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 55 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:58:05,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2022-12-14 06:58:05,843 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 27 [2022-12-14 06:58:05,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:58:05,843 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2022-12-14 06:58:05,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:58:05,843 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2022-12-14 06:58:05,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 06:58:05,844 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:58:05,844 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:58:05,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 06:58:06,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:58:06,046 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:58:06,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:58:06,046 INFO L85 PathProgramCache]: Analyzing trace with hash 680033222, now seen corresponding path program 2 times [2022-12-14 06:58:06,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:58:06,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342429866] [2022-12-14 06:58:06,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:58:06,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:58:06,076 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:58:06,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [892791684] [2022-12-14 06:58:06,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:58:06,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:58:06,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:58:06,078 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:58:06,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_327cd64d-cdb4-4437-ac18-bab87bad3458/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 06:58:06,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 06:58:06,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:58:06,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 95 conjunts are in the unsatisfiable core [2022-12-14 06:58:06,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:58:06,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 06:58:06,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:58:06,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-14 06:58:06,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:58:06,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:58:06,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:58:06,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-12-14 06:58:07,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:58:07,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-12-14 06:58:07,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:58:07,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-12-14 06:58:07,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:58:07,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:58:07,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-12-14 06:58:07,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:58:07,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:58:07,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-12-14 06:58:07,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:58:07,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:58:07,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 34 [2022-12-14 06:58:07,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:58:07,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:58:07,927 INFO L321 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2022-12-14 06:58:07,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 55 [2022-12-14 06:58:08,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:58:08,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 54 [2022-12-14 06:58:08,327 INFO L350 Elim1Store]: Elim1 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 49 treesize of output 43 [2022-12-14 06:58:08,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:58:08,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2022-12-14 06:58:08,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:58:08,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2022-12-14 06:58:08,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:58:08,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:58:08,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 27 [2022-12-14 06:58:08,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:58:08,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:58:08,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:58:08,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 34 [2022-12-14 06:58:09,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:58:09,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:58:09,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 31 [2022-12-14 06:58:09,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:58:09,401 INFO L321 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2022-12-14 06:58:09,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 43 [2022-12-14 06:58:10,614 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:58:10,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 44 [2022-12-14 06:58:10,735 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 06:58:10,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:58:13,905 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:58:13,906 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 198 treesize of output 168 [2022-12-14 06:58:29,402 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:58:29,402 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 1298 treesize of output 1052 [2022-12-14 06:58:29,577 WARN L837 $PredicateComparison]: unable to prove that (or (not (< 1 c_~N~0)) (forall ((v_arrayElimArr_5 (Array Int Int)) (|v_ULTIMATE.start_main_~i~0#1_478| Int) (|v_ULTIMATE.start_main_~i~0#1_486| Int) (v_arrayElimArr_4 (Array Int Int)) (|ULTIMATE.start_main_~#sum~0#1.offset| Int) (v_ArrVal_847 Int) (v_ArrVal_858 Int)) (let ((.cse1 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse0 (store (let ((.cse5 (store (let ((.cse6 (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_arrayElimArr_5))) (store .cse6 |c_ULTIMATE.start_main_~a~0#1.base| (store (let ((.cse8 (select .cse6 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse7 (store .cse8 |c_ULTIMATE.start_main_~a~0#1.offset| (+ (select .cse8 |c_ULTIMATE.start_main_~a~0#1.offset|) (select v_arrayElimArr_5 |ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse7 .cse1 (+ (select (select (store .cse6 |c_ULTIMATE.start_main_~a~0#1.base| .cse7) |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse8 .cse1))))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_486|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_847))) |c_ULTIMATE.start_main_~#sum~0#1.base| v_arrayElimArr_4))) (let ((.cse4 (select .cse5 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse3 (store .cse4 |c_ULTIMATE.start_main_~a~0#1.offset| (+ (select .cse4 |c_ULTIMATE.start_main_~a~0#1.offset|) (select v_arrayElimArr_4 |ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse3 .cse1 (+ (select .cse4 .cse1) (select (select (store .cse5 |c_ULTIMATE.start_main_~a~0#1.base| .cse3) |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|)))))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_478|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_858)) (.cse2 (+ (* c_~N~0 2) (* c_~N~0 c_~N~0) 1))) (or (= (select .cse0 .cse1) .cse2) (not (< |v_ULTIMATE.start_main_~i~0#1_486| c_~N~0)) (< (+ |v_ULTIMATE.start_main_~i~0#1_478| 1) c_~N~0) (not (= (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse2)) (not (< |v_ULTIMATE.start_main_~i~0#1_478| c_~N~0)) (< (+ |v_ULTIMATE.start_main_~i~0#1_486| 1) c_~N~0)))))) is different from false [2022-12-14 06:58:34,773 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_5 (Array Int Int)) (|v_ULTIMATE.start_main_~i~0#1_478| Int) (|v_ULTIMATE.start_main_~i~0#1_494| Int) (|v_ULTIMATE.start_main_~i~0#1_486| Int) (v_arrayElimArr_4 (Array Int Int)) (~N~0 Int) (v_ArrVal_838 Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int) (v_ArrVal_847 Int) (v_ArrVal_858 Int)) (let ((.cse1 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse2 (+ (* 2 ~N~0) (* ~N~0 ~N~0) 1)) (.cse0 (store (let ((.cse4 (store (let ((.cse6 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* 8 |v_ULTIMATE.start_main_~i~0#1_494|)) v_ArrVal_838)) |c_ULTIMATE.start_main_~#sum~0#1.base| v_arrayElimArr_5))) (store .cse6 |c_ULTIMATE.start_main_~a~0#1.base| (store (let ((.cse8 (select .cse6 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse7 (store .cse8 |c_ULTIMATE.start_main_~a~0#1.offset| (+ (select .cse8 |c_ULTIMATE.start_main_~a~0#1.offset|) (select v_arrayElimArr_5 |ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse7 .cse1 (+ (select .cse8 .cse1) (select (select (store .cse6 |c_ULTIMATE.start_main_~a~0#1.base| .cse7) |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|))))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_486|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_847))) |c_ULTIMATE.start_main_~#sum~0#1.base| v_arrayElimArr_4))) (let ((.cse5 (select .cse4 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse3 (store .cse5 |c_ULTIMATE.start_main_~a~0#1.offset| (+ (select .cse5 |c_ULTIMATE.start_main_~a~0#1.offset|) (select v_arrayElimArr_4 |ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse3 .cse1 (+ (select (select (store .cse4 |c_ULTIMATE.start_main_~a~0#1.base| .cse3) |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse5 .cse1)))))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_478|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_858))) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_494|)) (< (+ |v_ULTIMATE.start_main_~i~0#1_494| 1) ~N~0) (= (select .cse0 .cse1) .cse2) (not (< |v_ULTIMATE.start_main_~i~0#1_486| ~N~0)) (not (< |v_ULTIMATE.start_main_~i~0#1_478| ~N~0)) (< (+ |v_ULTIMATE.start_main_~i~0#1_478| 1) ~N~0) (not (= .cse2 (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|))) (not (< 1 ~N~0)) (< (+ |v_ULTIMATE.start_main_~i~0#1_486| 1) ~N~0) (not (< |v_ULTIMATE.start_main_~i~0#1_494| ~N~0)))))) is different from false [2022-12-14 06:58:34,994 INFO L321 Elim1Store]: treesize reduction 63, result has 37.6 percent of original size [2022-12-14 06:58:34,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 3362 treesize of output 1131 [2022-12-14 06:58:35,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4001 treesize of output 3741 [2022-12-14 06:58:35,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:58:35,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:58:35,191 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:58:35,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29024 treesize of output 24782 [2022-12-14 06:58:35,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:58:35,473 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:58:35,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24647 treesize of output 23753 [2022-12-14 06:58:35,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:58:35,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:58:36,123 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:58:36,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 18763 treesize of output 16889