./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ss4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/ss4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI --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 cb671fec0d42514b04873418e954f5a2df95ef7f393045434a478c03667a31d2 --- 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-5e519f3 [2022-11-03 04:01:17,531 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 04:01:17,534 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 04:01:17,575 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 04:01:17,576 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 04:01:17,577 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 04:01:17,579 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 04:01:17,581 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 04:01:17,583 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 04:01:17,584 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 04:01:17,586 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 04:01:17,587 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 04:01:17,588 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 04:01:17,589 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 04:01:17,591 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 04:01:17,592 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 04:01:17,593 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 04:01:17,595 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 04:01:17,597 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 04:01:17,604 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 04:01:17,606 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 04:01:17,612 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 04:01:17,614 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 04:01:17,615 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 04:01:17,620 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 04:01:17,620 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 04:01:17,621 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 04:01:17,622 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 04:01:17,622 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 04:01:17,624 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 04:01:17,624 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 04:01:17,625 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 04:01:17,636 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 04:01:17,638 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 04:01:17,639 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 04:01:17,640 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 04:01:17,641 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 04:01:17,641 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 04:01:17,641 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 04:01:17,643 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 04:01:17,643 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 04:01:17,646 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 04:01:17,701 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 04:01:17,702 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 04:01:17,702 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 04:01:17,703 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 04:01:17,704 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 04:01:17,704 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 04:01:17,704 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 04:01:17,705 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 04:01:17,705 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 04:01:17,705 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 04:01:17,707 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 04:01:17,707 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 04:01:17,708 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 04:01:17,708 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 04:01:17,708 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 04:01:17,708 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 04:01:17,709 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 04:01:17,709 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 04:01:17,710 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 04:01:17,710 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 04:01:17,711 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 04:01:17,711 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 04:01:17,711 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 04:01:17,714 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 04:01:17,714 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 04:01:17,715 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 04:01:17,715 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 04:01:17,715 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 04:01:17,716 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 04:01:17,716 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 04:01:17,716 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 04:01:17,717 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 04:01:17,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:01:17,718 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 04:01:17,718 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 04:01:17,718 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 04:01:17,719 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 04:01:17,719 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 04:01:17,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 04:01:17,719 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 04:01:17,720 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 04:01:17,720 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_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb671fec0d42514b04873418e954f5a2df95ef7f393045434a478c03667a31d2 [2022-11-03 04:01:18,051 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 04:01:18,099 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 04:01:18,103 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 04:01:18,104 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 04:01:18,105 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 04:01:18,107 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-fpi/ss4.c [2022-11-03 04:01:18,203 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/data/856e50e2f/f098259c7b9349e2a8fdd3816bf8aee6/FLAG43480622f [2022-11-03 04:01:18,761 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 04:01:18,762 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/sv-benchmarks/c/array-fpi/ss4.c [2022-11-03 04:01:18,774 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/data/856e50e2f/f098259c7b9349e2a8fdd3816bf8aee6/FLAG43480622f [2022-11-03 04:01:19,112 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/data/856e50e2f/f098259c7b9349e2a8fdd3816bf8aee6 [2022-11-03 04:01:19,121 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 04:01:19,122 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 04:01:19,125 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 04:01:19,126 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 04:01:19,129 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 04:01:19,130 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:01:19" (1/1) ... [2022-11-03 04:01:19,131 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a9f41ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:19, skipping insertion in model container [2022-11-03 04:01:19,131 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:01:19" (1/1) ... [2022-11-03 04:01:19,141 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 04:01:19,157 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 04:01:19,427 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/sv-benchmarks/c/array-fpi/ss4.c[586,599] [2022-11-03 04:01:19,476 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:01:19,493 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 04:01:19,516 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/sv-benchmarks/c/array-fpi/ss4.c[586,599] [2022-11-03 04:01:19,543 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:01:19,562 INFO L208 MainTranslator]: Completed translation [2022-11-03 04:01:19,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:19 WrapperNode [2022-11-03 04:01:19,563 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 04:01:19,565 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 04:01:19,566 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 04:01:19,566 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 04:01:19,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:19" (1/1) ... [2022-11-03 04:01:19,596 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:19" (1/1) ... [2022-11-03 04:01:19,636 INFO L138 Inliner]: procedures = 17, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 96 [2022-11-03 04:01:19,638 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 04:01:19,640 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 04:01:19,640 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 04:01:19,640 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 04:01:19,652 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:19" (1/1) ... [2022-11-03 04:01:19,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:19" (1/1) ... [2022-11-03 04:01:19,660 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:19" (1/1) ... [2022-11-03 04:01:19,661 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:19" (1/1) ... [2022-11-03 04:01:19,683 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:19" (1/1) ... [2022-11-03 04:01:19,691 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:19" (1/1) ... [2022-11-03 04:01:19,694 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:19" (1/1) ... [2022-11-03 04:01:19,697 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:19" (1/1) ... [2022-11-03 04:01:19,699 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 04:01:19,701 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 04:01:19,702 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 04:01:19,702 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 04:01:19,703 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:19" (1/1) ... [2022-11-03 04:01:19,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:01:19,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:01:19,743 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 04:01:19,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 04:01:19,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 04:01:19,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 04:01:19,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 04:01:19,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 04:01:19,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 04:01:19,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 04:01:19,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 04:01:19,818 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 04:01:19,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 04:01:19,948 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 04:01:19,950 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 04:01:20,276 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 04:01:20,369 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 04:01:20,370 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-03 04:01:20,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:01:20 BoogieIcfgContainer [2022-11-03 04:01:20,380 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 04:01:20,383 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 04:01:20,385 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 04:01:20,389 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 04:01:20,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:01:19" (1/3) ... [2022-11-03 04:01:20,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dbad7bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:01:20, skipping insertion in model container [2022-11-03 04:01:20,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:19" (2/3) ... [2022-11-03 04:01:20,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dbad7bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:01:20, skipping insertion in model container [2022-11-03 04:01:20,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:01:20" (3/3) ... [2022-11-03 04:01:20,393 INFO L112 eAbstractionObserver]: Analyzing ICFG ss4.c [2022-11-03 04:01:20,416 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 04:01:20,416 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 04:01:20,498 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 04:01:20,509 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;@45d09210, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 04:01:20,510 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 04:01:20,515 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:20,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 04:01:20,523 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:20,524 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:20,525 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:20,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:20,535 INFO L85 PathProgramCache]: Analyzing trace with hash -228288665, now seen corresponding path program 1 times [2022-11-03 04:01:20,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:01:20,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245834644] [2022-11-03 04:01:20,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:20,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:01:20,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:20,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:01:20,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245834644] [2022-11-03 04:01:20,756 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-03 04:01:20,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161609217] [2022-11-03 04:01:20,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:20,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:20,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:01:20,766 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:01:20,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 04:01:20,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:20,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 04:01:20,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:21,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:21,013 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:21,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161609217] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:21,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:21,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:01:21,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466589455] [2022-11-03 04:01:21,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:21,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:01:21,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:01:21,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:01:21,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:01:21,077 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 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 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:21,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:21,166 INFO L93 Difference]: Finished difference Result 22 states and 31 transitions. [2022-11-03 04:01:21,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:01:21,169 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2022-11-03 04:01:21,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:21,179 INFO L225 Difference]: With dead ends: 22 [2022-11-03 04:01:21,179 INFO L226 Difference]: Without dead ends: 10 [2022-11-03 04:01:21,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:01:21,187 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:21,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:01:21,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-03 04:01:21,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-11-03 04:01:21,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:21,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2022-11-03 04:01:21,223 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 8 [2022-11-03 04:01:21,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:21,223 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2022-11-03 04:01:21,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:21,224 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2022-11-03 04:01:21,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 04:01:21,224 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:21,225 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:21,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:21,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-03 04:01:21,439 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:21,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:21,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1111661393, now seen corresponding path program 1 times [2022-11-03 04:01:21,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:01:21,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867590086] [2022-11-03 04:01:21,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:21,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:01:21,471 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 04:01:21,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1182506470] [2022-11-03 04:01:21,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:21,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:21,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:01:21,474 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:01:21,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 04:01:21,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:21,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 04:01:21,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:21,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:01:21,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:21,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:01:21,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867590086] [2022-11-03 04:01:21,588 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 04:01:21,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182506470] [2022-11-03 04:01:21,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182506470] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:21,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:21,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:01:21,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134419603] [2022-11-03 04:01:21,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:21,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:01:21,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:01:21,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:01:21,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:01:21,592 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:21,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:21,635 INFO L93 Difference]: Finished difference Result 18 states and 25 transitions. [2022-11-03 04:01:21,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 04:01:21,636 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2022-11-03 04:01:21,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:21,637 INFO L225 Difference]: With dead ends: 18 [2022-11-03 04:01:21,637 INFO L226 Difference]: Without dead ends: 13 [2022-11-03 04:01:21,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:01:21,639 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 7 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:21,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 4 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:01:21,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-03 04:01:21,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-03 04:01:21,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:21,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2022-11-03 04:01:21,645 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 9 [2022-11-03 04:01:21,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:21,646 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2022-11-03 04:01:21,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:21,646 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2022-11-03 04:01:21,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-03 04:01:21,647 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:21,647 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:21,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:21,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:21,864 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:21,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:21,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1860477013, now seen corresponding path program 1 times [2022-11-03 04:01:21,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:01:21,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648971528] [2022-11-03 04:01:21,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:21,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:01:21,906 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 04:01:21,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1476880038] [2022-11-03 04:01:21,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:21,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:21,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:01:21,909 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:01:21,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 04:01:22,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:22,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-03 04:01:22,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:22,087 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-03 04:01:22,115 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 04:01:22,177 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 04:01:22,308 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-03 04:01:22,475 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-03 04:01:22,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 23 [2022-11-03 04:01:22,619 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-03 04:01:22,727 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 51 treesize of output 31 [2022-11-03 04:01:22,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:22,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:23,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:23,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:01:23,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648971528] [2022-11-03 04:01:23,492 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 04:01:23,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476880038] [2022-11-03 04:01:23,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476880038] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:23,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1610592392] [2022-11-03 04:01:23,515 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 04:01:23,515 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:01:23,520 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:01:23,526 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:01:23,527 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:01:23,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:23,614 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 04:01:23,614 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2022-11-03 04:01:23,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:23,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:23,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:23,759 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 04:01:23,760 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 04:01:23,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:23,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:23,836 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-03 04:01:23,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:23,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:23,946 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-03 04:01:24,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:24,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:24,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:24,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:24,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:24,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:24,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:24,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:24,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:24,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:24,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:24,360 INFO L356 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-03 04:01:24,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 20 case distinctions, treesize of input 420 treesize of output 410 [2022-11-03 04:01:24,560 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 04:01:24,629 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 04:01:24,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:01:24,753 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 04:01:24,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:01:24,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:24,854 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 04:01:24,856 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:01:24,992 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-03 04:01:24,993 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:01:25,041 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 04:01:25,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:25,102 INFO L356 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-03 04:01:25,103 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:01:25,212 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 04:01:25,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:01:25,259 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:01:26,272 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '248#(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_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#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 (= |ULTIMATE.start_main_#t~mem16#1| (+ ~N~0 (* ~N~0 ~N~0))) 1 0)) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-03 04:01:26,272 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 04:01:26,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:01:26,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2022-11-03 04:01:26,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632710918] [2022-11-03 04:01:26,273 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 04:01:26,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-03 04:01:26,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:01:26,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-03 04:01:26,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-11-03 04:01:26,276 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 19 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 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) [2022-11-03 04:01:27,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:27,104 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2022-11-03 04:01:27,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 04:01:27,106 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 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) Word has length 12 [2022-11-03 04:01:27,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:27,107 INFO L225 Difference]: With dead ends: 27 [2022-11-03 04:01:27,107 INFO L226 Difference]: Without dead ends: 21 [2022-11-03 04:01:27,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-11-03 04:01:27,109 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:27,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 23 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 138 Invalid, 0 Unknown, 18 Unchecked, 0.5s Time] [2022-11-03 04:01:27,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-03 04:01:27,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2022-11-03 04:01:27,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:27,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2022-11-03 04:01:27,119 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 12 [2022-11-03 04:01:27,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:27,120 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2022-11-03 04:01:27,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 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) [2022-11-03 04:01:27,120 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2022-11-03 04:01:27,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 04:01:27,121 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:27,121 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:27,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:27,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:27,347 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:27,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:27,347 INFO L85 PathProgramCache]: Analyzing trace with hash -689266881, now seen corresponding path program 2 times [2022-11-03 04:01:27,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:01:27,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284800468] [2022-11-03 04:01:27,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:27,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:01:27,387 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 04:01:27,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [754190572] [2022-11-03 04:01:27,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:01:27,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:27,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:01:27,390 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:01:27,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 04:01:27,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 04:01:27,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:01:27,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:01:27,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:27,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 04:01:27,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:27,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 04:01:27,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:01:27,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284800468] [2022-11-03 04:01:27,706 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 04:01:27,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754190572] [2022-11-03 04:01:27,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754190572] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:27,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1064255525] [2022-11-03 04:01:27,717 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 04:01:27,717 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:01:27,718 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:01:27,718 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:01:27,718 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:01:27,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:27,797 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 04:01:27,797 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2022-11-03 04:01:27,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:27,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:27,968 INFO L356 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-03 04:01:27,969 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 57 [2022-11-03 04:01:27,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:28,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:28,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:28,124 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 04:01:28,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 04:01:28,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:28,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:28,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-03 04:01:28,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:28,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:28,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:28,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:28,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:28,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:28,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:28,475 INFO L356 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-03 04:01:28,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 415 treesize of output 411 [2022-11-03 04:01:28,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 04:01:28,697 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 04:01:28,698 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:01:28,797 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 04:01:28,797 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:01:28,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:28,888 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 04:01:28,888 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:01:28,979 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-03 04:01:28,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:01:29,002 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 04:01:29,039 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 04:01:29,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:01:29,134 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 04:01:29,135 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:01:29,254 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 04:01:29,254 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:01:29,287 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:01:29,680 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '417#(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_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#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 (= |ULTIMATE.start_main_#t~mem16#1| (+ ~N~0 (* ~N~0 ~N~0))) 1 0)) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-03 04:01:29,680 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 04:01:29,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:01:29,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-03 04:01:29,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293323691] [2022-11-03 04:01:29,681 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 04:01:29,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 04:01:29,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:01:29,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 04:01:29,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-03 04:01:29,683 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:29,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:29,872 INFO L93 Difference]: Finished difference Result 31 states and 41 transitions. [2022-11-03 04:01:29,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:01:29,872 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 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 13 [2022-11-03 04:01:29,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:29,873 INFO L225 Difference]: With dead ends: 31 [2022-11-03 04:01:29,873 INFO L226 Difference]: Without dead ends: 24 [2022-11-03 04:01:29,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-03 04:01:29,875 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:29,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 4 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:01:29,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-03 04:01:29,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2022-11-03 04:01:29,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:29,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2022-11-03 04:01:29,886 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 13 [2022-11-03 04:01:29,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:29,886 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2022-11-03 04:01:29,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:29,887 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2022-11-03 04:01:29,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 04:01:29,887 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:29,888 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:29,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:30,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:30,108 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:30,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:30,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1839906970, now seen corresponding path program 3 times [2022-11-03 04:01:30,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:01:30,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581639530] [2022-11-03 04:01:30,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:30,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:01:30,157 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 04:01:30,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [93776372] [2022-11-03 04:01:30,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 04:01:30,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:30,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:01:30,164 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:01:30,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 04:01:30,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 04:01:30,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:01:30,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:01:30,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:30,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 04:01:30,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:30,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 04:01:30,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:01:30,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581639530] [2022-11-03 04:01:30,358 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 04:01:30,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93776372] [2022-11-03 04:01:30,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93776372] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:30,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [809559447] [2022-11-03 04:01:30,365 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 04:01:30,365 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:01:30,365 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:01:30,366 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:01:30,366 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:01:30,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:30,414 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 04:01:30,414 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2022-11-03 04:01:30,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:30,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:30,538 INFO L356 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-03 04:01:30,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 57 [2022-11-03 04:01:30,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:30,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:30,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:30,711 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 04:01:30,712 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 04:01:30,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:30,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:30,789 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-03 04:01:30,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:30,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:30,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:30,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:30,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:30,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:30,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:31,025 INFO L356 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-03 04:01:31,025 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 415 treesize of output 411 [2022-11-03 04:01:31,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 04:01:31,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:31,242 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 04:01:31,243 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:01:31,349 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 04:01:31,349 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:01:31,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:31,447 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 04:01:31,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:01:31,554 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-03 04:01:31,554 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:01:31,585 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 04:01:31,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:31,635 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 04:01:31,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:01:31,742 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 04:01:31,743 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:01:31,777 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:01:32,374 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '601#(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_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#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 (= |ULTIMATE.start_main_#t~mem16#1| (+ ~N~0 (* ~N~0 ~N~0))) 1 0)) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-03 04:01:32,374 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 04:01:32,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:01:32,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-03 04:01:32,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003163811] [2022-11-03 04:01:32,375 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 04:01:32,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 04:01:32,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:01:32,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 04:01:32,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-03 04:01:32,377 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:32,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:32,493 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2022-11-03 04:01:32,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:01:32,494 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 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 13 [2022-11-03 04:01:32,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:32,495 INFO L225 Difference]: With dead ends: 33 [2022-11-03 04:01:32,495 INFO L226 Difference]: Without dead ends: 17 [2022-11-03 04:01:32,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 10 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-11-03 04:01:32,496 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:32,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 10 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:01:32,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-03 04:01:32,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-03 04:01:32,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 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) [2022-11-03 04:01:32,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-11-03 04:01:32,507 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 13 [2022-11-03 04:01:32,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:32,507 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-11-03 04:01:32,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:32,508 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-11-03 04:01:32,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 04:01:32,509 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:32,509 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:32,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:32,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:32,715 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:32,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:32,715 INFO L85 PathProgramCache]: Analyzing trace with hash 664323303, now seen corresponding path program 4 times [2022-11-03 04:01:32,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:01:32,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545889286] [2022-11-03 04:01:32,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:32,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:01:32,749 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 04:01:32,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [255304035] [2022-11-03 04:01:32,750 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 04:01:32,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:32,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:01:32,752 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:01:32,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 04:01:32,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:32,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-03 04:01:32,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:32,896 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 04:01:32,902 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-03 04:01:32,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 04:01:32,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:32,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:01:33,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:33,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:33,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-11-03 04:01:33,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:33,135 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 35 [2022-11-03 04:01:33,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:33,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:33,265 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 44 [2022-11-03 04:01:33,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:33,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 39 [2022-11-03 04:01:33,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:33,430 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 41 [2022-11-03 04:01:33,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:33,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:33,514 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 44 [2022-11-03 04:01:33,602 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 37 [2022-11-03 04:01:33,709 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 80 treesize of output 44 [2022-11-03 04:01:33,751 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:33,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:56,462 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:56,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:01:56,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545889286] [2022-11-03 04:01:56,463 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 04:01:56,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255304035] [2022-11-03 04:01:56,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255304035] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:56,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2080106319] [2022-11-03 04:01:56,466 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 04:01:56,466 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:01:56,467 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:01:56,467 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:01:56,467 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:01:56,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:56,549 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 04:01:56,550 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2022-11-03 04:01:56,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:56,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:56,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:56,674 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 04:01:56,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 04:01:56,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:56,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:56,708 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-03 04:01:56,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:56,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:56,766 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-03 04:01:56,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:56,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:56,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:56,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:56,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:56,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:56,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:56,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:56,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:56,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:56,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:57,009 INFO L356 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-03 04:01:57,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 20 case distinctions, treesize of input 420 treesize of output 410 [2022-11-03 04:01:57,116 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 04:01:57,193 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 04:01:57,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:01:57,293 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 04:01:57,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:01:57,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:57,379 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 04:01:57,380 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:01:57,485 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-03 04:01:57,485 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:01:57,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 04:01:57,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:57,571 INFO L356 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-03 04:01:57,571 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:01:57,673 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 04:01:57,673 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:01:57,711 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:02:00,258 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '813#(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_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#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 (= |ULTIMATE.start_main_#t~mem16#1| (+ ~N~0 (* ~N~0 ~N~0))) 1 0)) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-03 04:02:00,259 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 04:02:00,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:02:00,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2022-11-03 04:02:00,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686397590] [2022-11-03 04:02:00,260 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 04:02:00,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-03 04:02:00,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:00,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-03 04:02:00,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=833, Unknown=4, NotChecked=0, Total=930 [2022-11-03 04:02:00,262 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 27 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:06,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:06,231 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2022-11-03 04:02:06,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 04:02:06,232 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-03 04:02:06,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:06,233 INFO L225 Difference]: With dead ends: 36 [2022-11-03 04:02:06,233 INFO L226 Difference]: Without dead ends: 29 [2022-11-03 04:02:06,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 7 SyntacticMatches, 10 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 28.9s TimeCoverageRelationStatistics Valid=125, Invalid=1131, Unknown=4, NotChecked=0, Total=1260 [2022-11-03 04:02:06,235 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:06,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 35 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 266 Invalid, 0 Unknown, 41 Unchecked, 2.0s Time] [2022-11-03 04:02:06,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-03 04:02:06,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2022-11-03 04:02:06,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:06,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2022-11-03 04:02:06,252 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 16 [2022-11-03 04:02:06,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:06,252 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2022-11-03 04:02:06,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:06,252 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2022-11-03 04:02:06,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 04:02:06,253 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:06,253 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:02:06,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-03 04:02:06,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 04:02:06,466 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:06,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:06,467 INFO L85 PathProgramCache]: Analyzing trace with hash 223428305, now seen corresponding path program 5 times [2022-11-03 04:02:06,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:06,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533193814] [2022-11-03 04:02:06,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:06,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:06,520 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 04:02:06,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1505581025] [2022-11-03 04:02:06,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:02:06,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:06,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:02:06,554 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:02:06,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 04:02:06,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 04:02:06,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:02:06,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 04:02:06,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:06,841 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 04:02:06,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:06,924 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 04:02:06,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:06,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533193814] [2022-11-03 04:02:06,925 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 04:02:06,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505581025] [2022-11-03 04:02:06,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505581025] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:06,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [34703538] [2022-11-03 04:02:06,930 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 04:02:06,930 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:02:06,931 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:02:06,931 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:02:06,931 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:02:06,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:06,990 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 04:02:06,991 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2022-11-03 04:02:07,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:07,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:07,123 INFO L356 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-03 04:02:07,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 57 [2022-11-03 04:02:07,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:07,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:07,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:07,250 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 04:02:07,250 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 04:02:07,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:07,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:07,297 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-03 04:02:07,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:07,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:07,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:07,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:07,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:07,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:02:07,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:02:07,521 INFO L356 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-03 04:02:07,522 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 415 treesize of output 411 [2022-11-03 04:02:07,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 04:02:07,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:02:07,696 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 04:02:07,696 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:02:07,785 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 04:02:07,786 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:02:07,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:02:07,870 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 04:02:07,871 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:02:07,971 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-03 04:02:07,972 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:02:08,002 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 04:02:08,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:02:08,062 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 04:02:08,063 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:02:08,160 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 04:02:08,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:02:08,197 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:02:08,819 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1043#(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_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#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 (= |ULTIMATE.start_main_#t~mem16#1| (+ ~N~0 (* ~N~0 ~N~0))) 1 0)) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-03 04:02:08,820 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 04:02:08,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:02:08,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-03 04:02:08,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056691647] [2022-11-03 04:02:08,820 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 04:02:08,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 04:02:08,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:08,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 04:02:08,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:02:08,822 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:09,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:09,130 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2022-11-03 04:02:09,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 04:02:09,132 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-03 04:02:09,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:09,132 INFO L225 Difference]: With dead ends: 41 [2022-11-03 04:02:09,132 INFO L226 Difference]: Without dead ends: 32 [2022-11-03 04:02:09,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 13 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2022-11-03 04:02:09,134 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:09,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 10 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:02:09,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-03 04:02:09,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2022-11-03 04:02:09,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:09,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-11-03 04:02:09,156 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 17 [2022-11-03 04:02:09,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:09,157 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-11-03 04:02:09,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:09,161 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-11-03 04:02:09,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 04:02:09,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:09,162 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:02:09,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:09,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-03 04:02:09,375 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:09,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:09,376 INFO L85 PathProgramCache]: Analyzing trace with hash -881119672, now seen corresponding path program 6 times [2022-11-03 04:02:09,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:09,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78958873] [2022-11-03 04:02:09,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:09,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:09,403 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 04:02:09,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1462364712] [2022-11-03 04:02:09,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 04:02:09,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:09,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:02:09,405 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:02:09,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 04:02:09,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 04:02:09,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:02:09,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 04:02:09,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:09,626 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 04:02:09,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:09,703 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 04:02:09,704 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:09,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78958873] [2022-11-03 04:02:09,704 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 04:02:09,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462364712] [2022-11-03 04:02:09,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462364712] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:09,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [933767703] [2022-11-03 04:02:09,707 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 04:02:09,707 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:02:09,707 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:02:09,707 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:02:09,708 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:02:09,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:09,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:09,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:09,849 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 04:02:09,850 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 04:02:09,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:09,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:09,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-03 04:02:09,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:09,896 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2022-11-03 04:02:09,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:09,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:09,946 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-03 04:02:10,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:10,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:10,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:10,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:10,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:10,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:02:10,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:02:10,173 INFO L356 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-03 04:02:10,174 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 415 treesize of output 411 [2022-11-03 04:02:10,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 04:02:10,350 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 04:02:10,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:02:10,440 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 04:02:10,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:02:10,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:02:10,526 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 04:02:10,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:02:10,626 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-03 04:02:10,626 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:02:10,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 04:02:10,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:02:10,706 INFO L356 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-03 04:02:10,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:02:10,803 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 04:02:10,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:02:10,840 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:02:11,529 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1288#(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_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#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 (= |ULTIMATE.start_main_#t~mem16#1| (+ ~N~0 (* ~N~0 ~N~0))) 1 0)) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-03 04:02:11,530 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 04:02:11,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:02:11,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-03 04:02:11,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456333791] [2022-11-03 04:02:11,531 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 04:02:11,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 04:02:11,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:11,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 04:02:11,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:02:11,532 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:11,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:11,731 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2022-11-03 04:02:11,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:02:11,732 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-03 04:02:11,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:11,732 INFO L225 Difference]: With dead ends: 42 [2022-11-03 04:02:11,733 INFO L226 Difference]: Without dead ends: 21 [2022-11-03 04:02:11,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 14 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:02:11,734 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:11,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 10 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:02:11,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-03 04:02:11,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-03 04:02:11,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:11,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-11-03 04:02:11,757 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 17 [2022-11-03 04:02:11,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:11,758 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-11-03 04:02:11,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:11,758 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-11-03 04:02:11,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-03 04:02:11,759 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:11,760 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:02:11,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:11,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-03 04:02:11,975 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:11,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:11,975 INFO L85 PathProgramCache]: Analyzing trace with hash 449636693, now seen corresponding path program 7 times [2022-11-03 04:02:11,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:11,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797661804] [2022-11-03 04:02:11,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:11,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:12,030 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 04:02:12,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1775400747] [2022-11-03 04:02:12,041 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 04:02:12,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:12,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:02:12,046 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:02:12,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 04:02:12,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:12,172 WARN L261 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-03 04:02:12,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:12,189 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 04:02:12,198 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-03 04:02:12,225 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-03 04:02:12,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:02:12,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:12,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:12,309 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-03 04:02:12,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:12,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:12,427 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 47 [2022-11-03 04:02:12,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:12,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:12,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:12,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:12,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:02:12,507 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 63 treesize of output 50 [2022-11-03 04:02:12,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:12,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:12,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 49 [2022-11-03 04:02:12,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:12,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:12,762 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 47 [2022-11-03 04:02:12,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:12,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:12,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 47 [2022-11-03 04:02:12,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:12,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:12,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 47 [2022-11-03 04:02:13,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:13,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:13,041 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 47 [2022-11-03 04:02:13,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:13,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:02:13,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:13,139 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:02:13,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:13,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:13,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:02:13,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 55 [2022-11-03 04:02:13,326 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 43 [2022-11-03 04:02:13,450 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 67 treesize of output 39 [2022-11-03 04:02:13,497 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:13,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:07,700 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:07,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:04:07,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797661804] [2022-11-03 04:04:07,701 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 04:04:07,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775400747] [2022-11-03 04:04:07,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775400747] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:07,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [470585555] [2022-11-03 04:04:07,715 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 04:04:07,715 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:04:07,716 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:04:07,716 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:04:07,716 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:04:07,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:04:07,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:04:07,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:04:07,862 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 04:04:07,862 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 04:04:07,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:04:07,886 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2022-11-03 04:04:07,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:04:07,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:04:07,916 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-03 04:04:07,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:04:07,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:04:07,969 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-03 04:04:08,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:04:08,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:04:08,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:04:08,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:04:08,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:04:08,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:04:08,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:04:08,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:04:08,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:04:08,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:04:08,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:04:08,159 INFO L356 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-03 04:04:08,159 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 20 case distinctions, treesize of input 420 treesize of output 410 [2022-11-03 04:04:08,292 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 04:04:08,338 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 04:04:08,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:04:08,433 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 04:04:08,434 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:04:08,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:04:08,516 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 04:04:08,516 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:04:08,633 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-03 04:04:08,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:04:08,670 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 04:04:08,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:04:08,718 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 04:04:08,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:04:08,815 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 04:04:08,816 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:04:08,846 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:04:17,235 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1560#(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_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#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 (= |ULTIMATE.start_main_#t~mem16#1| (+ ~N~0 (* ~N~0 ~N~0))) 1 0)) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-03 04:04:17,235 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 04:04:17,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:04:17,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 35 [2022-11-03 04:04:17,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158881606] [2022-11-03 04:04:17,235 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 04:04:17,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-03 04:04:17,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:04:17,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-03 04:04:17,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1342, Unknown=20, NotChecked=0, Total=1482 [2022-11-03 04:04:17,238 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 35 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:05,168 WARN L234 SmtUtils]: Spent 6.31s on a formula simplification. DAG size of input: 105 DAG size of output: 57 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:05:19,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:05:19,025 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2022-11-03 04:05:19,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 04:05:19,026 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 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 [2022-11-03 04:05:19,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:05:19,027 INFO L225 Difference]: With dead ends: 45 [2022-11-03 04:05:19,027 INFO L226 Difference]: Without dead ends: 37 [2022-11-03 04:05:19,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 8 SyntacticMatches, 13 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 175.8s TimeCoverageRelationStatistics Valid=163, Invalid=1791, Unknown=26, NotChecked=0, Total=1980 [2022-11-03 04:05:19,029 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-03 04:05:19,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 41 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 403 Invalid, 0 Unknown, 86 Unchecked, 6.6s Time] [2022-11-03 04:05:19,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-03 04:05:19,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2022-11-03 04:05:19,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:19,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-11-03 04:05:19,052 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 20 [2022-11-03 04:05:19,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:05:19,052 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-11-03 04:05:19,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:19,053 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-11-03 04:05:19,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-03 04:05:19,053 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:05:19,054 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:05:19,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 04:05:19,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:05:19,255 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:05:19,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:05:19,255 INFO L85 PathProgramCache]: Analyzing trace with hash 444751423, now seen corresponding path program 8 times [2022-11-03 04:05:19,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:05:19,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106440028] [2022-11-03 04:05:19,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:19,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:05:19,291 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 04:05:19,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [397897512] [2022-11-03 04:05:19,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:05:19,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:05:19,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:05:19,294 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:05:19,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 04:05:19,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 04:05:19,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:05:19,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 04:05:19,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:19,635 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 04:05:19,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:05:19,763 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 04:05:19,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:05:19,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106440028] [2022-11-03 04:05:19,764 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 04:05:19,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397897512] [2022-11-03 04:05:19,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397897512] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:05:19,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [335369453] [2022-11-03 04:05:19,766 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 04:05:19,767 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:05:19,767 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:05:19,767 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:05:19,767 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:05:19,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:19,818 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 04:05:19,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2022-11-03 04:05:19,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:19,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:19,986 INFO L356 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-03 04:05:19,987 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 57 [2022-11-03 04:05:20,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:20,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:20,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:20,168 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 04:05:20,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 04:05:20,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:20,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:20,229 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-03 04:05:20,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:20,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:20,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:20,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:20,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:20,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:05:20,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:20,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:20,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:20,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:20,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:20,482 INFO L356 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-03 04:05:20,483 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 20 case distinctions, treesize of input 420 treesize of output 410 [2022-11-03 04:05:20,571 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 04:05:20,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:05:20,632 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 04:05:20,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:05:20,760 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 04:05:20,760 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:05:20,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:05:20,849 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 04:05:20,850 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:05:20,955 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-03 04:05:20,955 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:05:20,978 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 04:05:20,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:05:21,016 INFO L356 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-03 04:05:21,017 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:05:21,127 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 04:05:21,128 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:05:21,230 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 04:05:21,231 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:05:21,258 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:05:21,741 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1849#(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_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#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 (= |ULTIMATE.start_main_#t~mem16#1| (+ ~N~0 (* ~N~0 ~N~0))) 1 0)) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-03 04:05:21,741 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 04:05:21,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:05:21,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-11-03 04:05:21,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129033708] [2022-11-03 04:05:21,742 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 04:05:21,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-03 04:05:21,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:05:21,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-03 04:05:21,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:05:21,744 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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) [2022-11-03 04:05:22,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:05:22,144 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2022-11-03 04:05:22,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 04:05:22,145 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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 [2022-11-03 04:05:22,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:05:22,146 INFO L225 Difference]: With dead ends: 51 [2022-11-03 04:05:22,146 INFO L226 Difference]: Without dead ends: 40 [2022-11-03 04:05:22,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 35 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2022-11-03 04:05:22,148 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:05:22,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 4 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 04:05:22,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-03 04:05:22,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2022-11-03 04:05:22,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:22,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2022-11-03 04:05:22,180 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 21 [2022-11-03 04:05:22,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:05:22,180 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2022-11-03 04:05:22,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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) [2022-11-03 04:05:22,187 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-11-03 04:05:22,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-03 04:05:22,188 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:05:22,188 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:05:22,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 04:05:22,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:05:22,389 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:05:22,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:05:22,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1053530010, now seen corresponding path program 9 times [2022-11-03 04:05:22,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:05:22,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480667854] [2022-11-03 04:05:22,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:22,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:05:22,451 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 04:05:22,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [235676996] [2022-11-03 04:05:22,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 04:05:22,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:05:22,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:05:22,467 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:05:22,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 04:05:22,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 04:05:22,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:05:22,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 04:05:22,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:22,693 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 04:05:22,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:05:22,804 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 04:05:22,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:05:22,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480667854] [2022-11-03 04:05:22,805 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 04:05:22,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235676996] [2022-11-03 04:05:22,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235676996] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:05:22,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1933486443] [2022-11-03 04:05:22,807 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 04:05:22,807 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:05:22,808 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:05:22,808 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:05:22,808 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:05:22,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:22,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:22,946 INFO L356 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-03 04:05:22,946 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 57 [2022-11-03 04:05:22,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:22,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:22,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:23,067 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 04:05:23,067 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 04:05:23,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:23,101 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2022-11-03 04:05:23,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:23,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:23,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-03 04:05:23,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:23,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:23,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:23,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:23,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:23,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:05:23,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:05:23,406 INFO L356 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-03 04:05:23,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 415 treesize of output 411 [2022-11-03 04:05:23,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 04:05:23,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:05:23,642 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 04:05:23,642 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:05:23,752 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 04:05:23,753 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:05:23,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:05:23,841 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 04:05:23,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:05:23,948 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-03 04:05:23,949 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:05:23,972 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 04:05:23,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:05:24,015 INFO L356 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-03 04:05:24,015 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:05:24,151 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 04:05:24,151 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:05:24,186 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:05:25,018 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2155#(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_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#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 (= |ULTIMATE.start_main_#t~mem16#1| (+ ~N~0 (* ~N~0 ~N~0))) 1 0)) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-03 04:05:25,018 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 04:05:25,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:05:25,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-11-03 04:05:25,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181276197] [2022-11-03 04:05:25,019 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 04:05:25,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-03 04:05:25,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:05:25,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-03 04:05:25,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:05:25,020 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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) [2022-11-03 04:05:25,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:05:25,391 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2022-11-03 04:05:25,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 04:05:25,392 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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 [2022-11-03 04:05:25,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:05:25,393 INFO L225 Difference]: With dead ends: 51 [2022-11-03 04:05:25,393 INFO L226 Difference]: Without dead ends: 25 [2022-11-03 04:05:25,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 14 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2022-11-03 04:05:25,395 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:05:25,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 8 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 04:05:25,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-03 04:05:25,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-03 04:05:25,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:25,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-11-03 04:05:25,416 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 21 [2022-11-03 04:05:25,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:05:25,416 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-11-03 04:05:25,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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) [2022-11-03 04:05:25,417 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-11-03 04:05:25,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-03 04:05:25,418 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:05:25,418 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:05:25,451 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-03 04:05:25,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-03 04:05:25,619 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:05:25,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:05:25,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1463476839, now seen corresponding path program 10 times [2022-11-03 04:05:25,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:05:25,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891395292] [2022-11-03 04:05:25,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:25,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:05:25,655 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 04:05:25,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [71383099] [2022-11-03 04:05:25,656 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 04:05:25,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:05:25,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:05:25,658 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:05:25,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 04:05:25,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:25,838 WARN L261 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 120 conjunts are in the unsatisfiable core [2022-11-03 04:05:25,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:25,864 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 04:05:25,870 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-03 04:05:25,904 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-03 04:05:25,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:25,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:05:26,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:26,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:26,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:26,015 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 45 [2022-11-03 04:05:26,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:26,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:26,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:26,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 54 [2022-11-03 04:05:26,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:26,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:05:26,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:26,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:26,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 64 [2022-11-03 04:05:26,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:26,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:26,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:26,378 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 59 [2022-11-03 04:05:26,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:26,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:26,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:26,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:26,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:05:26,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:26,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:26,507 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 64 [2022-11-03 04:05:26,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:26,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:26,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:26,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 62 [2022-11-03 04:05:26,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:26,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:05:26,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:26,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:26,862 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 69 [2022-11-03 04:05:27,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:27,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:27,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:27,026 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 66 [2022-11-03 04:05:27,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:27,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:27,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:27,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:27,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:05:27,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:27,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:27,184 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 68 [2022-11-03 04:05:27,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:27,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:27,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:27,301 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 59 [2022-11-03 04:05:27,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:27,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:27,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:27,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-11-03 04:05:27,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:27,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:27,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:27,551 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 59 [2022-11-03 04:05:27,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:27,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:27,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:27,662 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 59 [2022-11-03 04:05:27,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:27,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:27,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:27,817 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 61 [2022-11-03 04:05:27,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-11-03 04:05:28,083 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 40 [2022-11-03 04:05:28,155 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:28,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:03,406 WARN L833 $PredicateComparison]: unable to prove that (forall ((~N~0 Int)) (or (= (let ((.cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 24)) (.cse6 (+ 16 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse7 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse3 (let ((.cse20 (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))) (let ((.cse18 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse20))) (let ((.cse19 (select .cse18 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse13 (select .cse19 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse17 (select .cse20 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse15 (select (select (store .cse18 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse19 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse13 .cse17))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse7))) (let ((.cse14 (select (select (store .cse18 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse19 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse13 .cse15 .cse17))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse6))) (let ((.cse16 (select (select (store .cse18 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse19 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse13 .cse14 .cse15 .cse17))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5))) (let ((.cse8 (store .cse18 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse19 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse13 .cse14 .cse15 .cse16 .cse17))))) (store .cse8 |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse10 (select .cse8 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse9 (let ((.cse11 (let ((.cse12 (store .cse10 |c_ULTIMATE.start_main_~a~0#1.offset| (+ .cse13 .cse14 .cse15 (select .cse10 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse16 .cse17)))) (store .cse12 .cse7 (+ (select .cse10 .cse7) (select (select (store .cse8 |c_ULTIMATE.start_main_~a~0#1.base| .cse12) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))) (store .cse11 .cse6 (+ (select (select (store .cse8 |c_ULTIMATE.start_main_~a~0#1.base| .cse11) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse10 .cse6)))))) (store .cse9 .cse5 (+ (select .cse10 .cse5) (select (select (store .cse8 |c_ULTIMATE.start_main_~a~0#1.base| .cse9) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))))))))))))) (let ((.cse4 (select .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse1 (select (select (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset| 0)) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse0 (select (select (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse1)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse7))) (let ((.cse2 (select (select (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse1))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse6))) (+ .cse0 .cse1 .cse2 (select (select (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse1 .cse2))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5)))))))) (+ ~N~0 (* ~N~0 ~N~0))) (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) ~N~0) (not (< |c_ULTIMATE.start_main_~i~0#1| ~N~0)))) is different from false [2022-11-03 04:09:49,341 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2022-11-03 04:09:49,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:09:49,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891395292] [2022-11-03 04:09:49,341 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 04:09:49,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71383099] [2022-11-03 04:09:49,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71383099] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:09:49,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [983377664] [2022-11-03 04:09:49,343 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 04:09:49,343 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:09:49,343 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:09:49,343 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:09:49,344 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:09:49,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:09:49,382 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 04:09:49,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2022-11-03 04:09:49,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:09:49,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:09:49,488 INFO L356 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-03 04:09:49,488 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 57 [2022-11-03 04:09:49,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:09:49,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:09:49,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:09:49,645 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 04:09:49,645 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 04:09:49,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:09:49,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:09:49,681 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-03 04:09:49,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:09:49,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:09:49,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:09:49,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:09:49,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:09:49,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:09:49,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:09:49,843 INFO L356 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-03 04:09:49,843 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 415 treesize of output 411 [2022-11-03 04:09:49,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 04:09:50,002 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 04:09:50,002 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:09:50,084 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 04:09:50,084 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:09:50,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:09:50,160 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 04:09:50,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:09:50,253 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-03 04:09:50,253 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:09:50,274 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 04:09:50,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:09:50,303 INFO L356 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-03 04:09:50,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:09:50,371 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 04:09:50,372 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:09:50,395 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:10:05,730 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2487#(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_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#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 (= |ULTIMATE.start_main_#t~mem16#1| (+ ~N~0 (* ~N~0 ~N~0))) 1 0)) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-03 04:10:05,731 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 04:10:05,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:10:05,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 43 [2022-11-03 04:10:05,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990213700] [2022-11-03 04:10:05,731 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 04:10:05,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-03 04:10:05,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:10:05,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-03 04:10:05,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1889, Unknown=38, NotChecked=88, Total=2162 [2022-11-03 04:10:05,733 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 43 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:52,992 WARN L234 SmtUtils]: Spent 6.34s on a formula simplification. DAG size of input: 147 DAG size of output: 85 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:10:55,042 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 [] [2022-11-03 04:10:57,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 04:11:01,801 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse20 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse15 (select .cse20 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse39 (* 8 |c_ULTIMATE.start_main_~i~0#1|))) (let ((.cse40 (let ((.cse42 (+ .cse39 |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse0 .cse42 (+ .cse15 (select .cse0 .cse42)))))) (let ((.cse24 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse40))) (let ((.cse25 (select .cse24 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse37 (let ((.cse41 (+ .cse39 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse40 .cse41 (+ (select .cse0 .cse41) (select .cse25 |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))) (let ((.cse28 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse37)) (.cse8 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 24))) (let ((.cse21 (select .cse0 .cse8)) (.cse1 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse29 (select .cse28 |c_ULTIMATE.start_main_~#sum~0#1.base|)) (.cse2 (+ c_~N~0 (* c_~N~0 c_~N~0))) (.cse9 (+ 16 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse19 (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (= (select .cse0 .cse1) 5) (<= c_~N~0 4) (or (< |c_ULTIMATE.start_main_~i~0#1| c_~N~0) (= .cse2 (let ((.cse5 (let ((.cse16 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse20 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse15 .cse19))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1))) (let ((.cse18 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse20 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse15 .cse16 .cse19))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse9))) (let ((.cse17 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse20 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse15 .cse16 .cse18 .cse19))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse8))) (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse20 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse15 .cse16 .cse17 .cse18 .cse19))))) (store .cse10 |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse12 (select .cse10 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse11 (let ((.cse13 (let ((.cse14 (store .cse12 |c_ULTIMATE.start_main_~a~0#1.offset| (+ .cse15 .cse16 .cse17 .cse18 (select .cse12 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse19)))) (store .cse14 .cse1 (+ (select .cse12 .cse1) (select (select (store .cse10 |c_ULTIMATE.start_main_~a~0#1.base| .cse14) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))) (store .cse13 .cse9 (+ (select .cse12 .cse9) (select (select (store .cse10 |c_ULTIMATE.start_main_~a~0#1.base| .cse13) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))) (store .cse11 .cse8 (+ (select .cse12 .cse8) (select (select (store .cse10 |c_ULTIMATE.start_main_~a~0#1.base| .cse11) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))))))))) (let ((.cse6 (select .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse3 (select (select (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset| 0)) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse4 (select (select (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse3)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1))) (let ((.cse7 (select (select (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse3 .cse4))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse9))) (+ .cse3 .cse4 (select (select (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse3 .cse4 .cse7))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse8) .cse7)))))))) (= 5 .cse21) (= .cse2 (let ((.cse22 (select (select (store .cse24 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse25 |c_ULTIMATE.start_main_~#sum~0#1.offset| 0)) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse26 (select (select (store .cse24 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse25 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse22)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1))) (let ((.cse23 (select (select (store .cse24 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse25 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse22 .cse26))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse9))) (+ .cse22 .cse23 (select (select (store .cse24 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse25 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse22 .cse23 .cse26))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse8) .cse26))))) (not (= |c_ULTIMATE.start_main_~#sum~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (= (+ .cse15 1) .cse21) (= (let ((.cse30 (select (select (store .cse28 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse29 |c_ULTIMATE.start_main_~#sum~0#1.offset| 0)) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse27 (select (select (store .cse28 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse29 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse30)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1))) (let ((.cse31 (select (select (store .cse28 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse29 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse27 .cse30))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse9))) (+ .cse27 (select (select (store .cse28 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse29 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse27 .cse30 .cse31))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse8) .cse30 .cse31)))) .cse2) (= (let ((.cse34 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse38 (+ .cse39 16 |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse37 .cse38 (+ (select .cse29 |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse0 .cse38))))))) (let ((.cse35 (select .cse34 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse33 (select (select (store .cse34 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse35 |c_ULTIMATE.start_main_~#sum~0#1.offset| 0)) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse32 (select (select (store .cse34 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse35 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse33)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1))) (let ((.cse36 (select (select (store .cse34 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse35 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse32 .cse33))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse9))) (+ .cse32 .cse33 (select (select (store .cse34 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse35 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse32 .cse33 .cse36))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse8) .cse36)))))) .cse2) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= (select .cse0 .cse9) 5) (< 3 c_~N~0) (= 5 .cse19)))))))))) is different from false [2022-11-03 04:11:19,311 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse46 (* 8 |c_ULTIMATE.start_main_~i~0#1|))) (let ((.cse26 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse49 (+ .cse46 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse37 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse35 (select .cse37 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse36 (select .cse26 .cse49))) (let ((.cse41 (+ .cse35 .cse36))) (let ((.cse48 (store .cse26 .cse49 .cse41))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse48))) (let ((.cse42 (+ .cse46 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse4 (select .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse47 (store .cse48 .cse42 (+ (select .cse26 .cse42) (select .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse47))) (let ((.cse11 (select .cse10 |c_ULTIMATE.start_main_~#sum~0#1.base|)) (.cse40 (+ .cse46 16 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse24 (store .cse47 .cse40 (+ (select .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse26 .cse40))))) (let ((.cse16 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse24))) (let ((.cse17 (select .cse16 |c_ULTIMATE.start_main_~#sum~0#1.base|)) (.cse25 (+ .cse46 |c_ULTIMATE.start_main_~a~0#1.offset| 24)) (.cse6 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 24)) (.cse7 (+ 16 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse8 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse0 (+ c_~N~0 (* c_~N~0 c_~N~0)))) (and (= .cse0 (let ((.cse1 (select (select (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset| 0)) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse5 (select (select (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse1)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse8))) (let ((.cse2 (select (select (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse7))) (+ .cse1 .cse2 (select (select (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse2 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse6) .cse5))))) (= (let ((.cse12 (select (select (store .cse10 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset| 0)) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse9 (select (select (store .cse10 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse12)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse8))) (let ((.cse13 (select (select (store .cse10 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse9 .cse12))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse7))) (+ .cse9 (select (select (store .cse10 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse9 .cse12 .cse13))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse6) .cse12 .cse13)))) .cse0) (= (let ((.cse15 (select (select (store .cse16 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse17 |c_ULTIMATE.start_main_~#sum~0#1.offset| 0)) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse14 (select (select (store .cse16 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse17 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse15)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse8))) (let ((.cse18 (select (select (store .cse16 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse17 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse14 .cse15))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse7))) (+ .cse14 .cse15 (select (select (store .cse16 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse17 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse14 .cse15 .cse18))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse6) .cse18)))) .cse0) (= .cse0 (let ((.cse22 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store .cse24 .cse25 (+ (select .cse17 |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse26 .cse25)))))) (let ((.cse23 (select .cse22 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse20 (select (select (store .cse22 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse23 |c_ULTIMATE.start_main_~#sum~0#1.offset| 0)) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse21 (select (select (store .cse22 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse23 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse20)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse8))) (let ((.cse19 (select (select (store .cse22 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse23 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse20 .cse21))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse7))) (+ .cse19 .cse20 .cse21 (select (select (store .cse22 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse23 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse19 .cse20 .cse21))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse6)))))))) (= (let ((.cse28 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse32 (let ((.cse33 (let ((.cse34 (store .cse26 |c_ULTIMATE.start_main_~a~0#1.offset| (+ .cse35 (select .cse26 |c_ULTIMATE.start_main_~a~0#1.offset|))))) (store .cse34 .cse8 (+ (select .cse26 .cse8) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse34) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))) (store .cse33 .cse7 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse33) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse26 .cse7)))))) (store .cse32 .cse6 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse32) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse26 .cse6))))))) (let ((.cse29 (select .cse28 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse31 (select (select (store .cse28 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse29 |c_ULTIMATE.start_main_~#sum~0#1.offset| 0)) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse30 (select (select (store .cse28 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse29 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse31)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse8))) (let ((.cse27 (select (select (store .cse28 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse29 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse30 .cse31))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse7))) (+ .cse27 (select (select (store .cse28 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse29 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse27 .cse30 .cse31))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse6) .cse30 .cse31)))))) .cse0) (= (let ((.cse39 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse37 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse41)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse42))) (let ((.cse38 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse37 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse35 .cse36 .cse39))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse40))) (+ .cse35 .cse36 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse37 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse35 .cse36 .cse38 .cse39))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse25) .cse38 .cse39))) .cse0) (= (let ((.cse43 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse37 |c_ULTIMATE.start_main_~#sum~0#1.offset| 0)) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse45 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse37 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse43)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse8))) (let ((.cse44 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse37 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse43 .cse45))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse7))) (+ .cse43 .cse44 .cse45 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse37 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse43 .cse44 .cse45))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse6))))) .cse0))))))))))))))) is different from false [2022-11-03 04:12:04,056 WARN L234 SmtUtils]: Spent 8.23s on a formula simplification. DAG size of input: 167 DAG size of output: 107 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:12:05,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:12:05,068 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2022-11-03 04:12:05,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-03 04:12:05,069 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-03 04:12:05,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:12:05,071 INFO L225 Difference]: With dead ends: 53 [2022-11-03 04:12:05,071 INFO L226 Difference]: Without dead ends: 50 [2022-11-03 04:12:05,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 12 SemanticMatches, 52 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 360.3s TimeCoverageRelationStatistics Valid=191, Invalid=2320, Unknown=51, NotChecked=300, Total=2862 [2022-11-03 04:12:05,073 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 53 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 27.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:12:05,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 51 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 506 Invalid, 1 Unknown, 124 Unchecked, 27.2s Time] [2022-11-03 04:12:05,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-03 04:12:05,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2022-11-03 04:12:05,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.275) internal successors, (51), 40 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:05,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2022-11-03 04:12:05,100 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 24 [2022-11-03 04:12:05,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:12:05,100 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2022-11-03 04:12:05,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:05,101 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2022-11-03 04:12:05,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-03 04:12:05,101 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:12:05,102 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:12:05,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 04:12:05,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 04:12:05,306 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:12:05,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:12:05,307 INFO L85 PathProgramCache]: Analyzing trace with hash -470298031, now seen corresponding path program 11 times [2022-11-03 04:12:05,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:12:05,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32532814] [2022-11-03 04:12:05,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:05,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:12:05,356 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 04:12:05,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [405523495] [2022-11-03 04:12:05,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:12:05,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:12:05,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:12:05,364 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:12:05,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 04:12:05,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 04:12:05,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:12:05,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 04:12:05,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:06,007 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 04:12:06,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:12:06,130 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 04:12:06,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:12:06,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32532814] [2022-11-03 04:12:06,130 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 04:12:06,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405523495] [2022-11-03 04:12:06,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405523495] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:12:06,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1127053392] [2022-11-03 04:12:06,132 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 04:12:06,132 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:12:06,133 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:12:06,133 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:12:06,133 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:12:06,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:06,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:06,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:06,240 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 04:12:06,240 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 04:12:06,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:06,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:06,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-03 04:12:06,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:06,286 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2022-11-03 04:12:06,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:06,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:06,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-03 04:12:06,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:06,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:06,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:06,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:06,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:06,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:12:06,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:12:06,498 INFO L356 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-03 04:12:06,498 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 415 treesize of output 411 [2022-11-03 04:12:06,650 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 04:12:06,691 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 04:12:06,691 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:12:06,758 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 04:12:06,758 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:12:06,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:12:06,820 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 04:12:06,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:12:06,905 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-03 04:12:06,906 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:12:06,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 04:12:06,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:12:06,969 INFO L356 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-03 04:12:06,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:12:07,063 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 04:12:07,064 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:12:07,087 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:12:07,860 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2843#(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_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#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 (= |ULTIMATE.start_main_#t~mem16#1| (+ ~N~0 (* ~N~0 ~N~0))) 1 0)) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-03 04:12:07,860 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 04:12:07,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:12:07,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-11-03 04:12:07,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303092410] [2022-11-03 04:12:07,862 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 04:12:07,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-03 04:12:07,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:12:07,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-03 04:12:07,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-11-03 04:12:07,865 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:08,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:12:08,549 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2022-11-03 04:12:08,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 04:12:08,551 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-03 04:12:08,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:12:08,551 INFO L225 Difference]: With dead ends: 66 [2022-11-03 04:12:08,552 INFO L226 Difference]: Without dead ends: 53 [2022-11-03 04:12:08,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 32 SyntacticMatches, 21 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2022-11-03 04:12:08,554 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 12 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:12:08,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 10 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 04:12:08,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-03 04:12:08,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2022-11-03 04:12:08,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:08,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2022-11-03 04:12:08,574 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 25 [2022-11-03 04:12:08,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:12:08,574 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2022-11-03 04:12:08,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:08,574 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2022-11-03 04:12:08,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-03 04:12:08,575 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:12:08,575 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:12:08,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 04:12:08,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 04:12:08,778 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:12:08,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:12:08,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1877163832, now seen corresponding path program 12 times [2022-11-03 04:12:08,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:12:08,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075051147] [2022-11-03 04:12:08,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:08,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:12:08,802 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 04:12:08,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1556766234] [2022-11-03 04:12:08,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 04:12:08,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:12:08,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:12:08,804 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:12:08,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 04:12:08,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 04:12:08,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:12:08,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 04:12:08,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:09,030 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 04:12:09,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:12:09,157 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 04:12:09,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:12:09,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075051147] [2022-11-03 04:12:09,158 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 04:12:09,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556766234] [2022-11-03 04:12:09,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556766234] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:12:09,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1507154459] [2022-11-03 04:12:09,161 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 04:12:09,161 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:12:09,162 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:12:09,162 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:12:09,162 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:12:09,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:09,204 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 04:12:09,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2022-11-03 04:12:09,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:09,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:09,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:09,302 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 04:12:09,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 04:12:09,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:09,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:09,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-03 04:12:09,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:09,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:09,359 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-03 04:12:09,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:09,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:09,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:09,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:09,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:09,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:12:09,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:09,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:09,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:09,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:09,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:09,525 INFO L356 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-03 04:12:09,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 20 case distinctions, treesize of input 420 treesize of output 410 [2022-11-03 04:12:09,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 04:12:09,649 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 04:12:09,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:12:09,721 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 04:12:09,721 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:12:09,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:12:09,793 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 04:12:09,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:12:09,869 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-03 04:12:09,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:12:09,883 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 04:12:09,916 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 04:12:09,916 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:12:09,992 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 04:12:09,992 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 04:12:10,016 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:12:10,784 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3210#(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_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#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 (= |ULTIMATE.start_main_#t~mem16#1| (+ ~N~0 (* ~N~0 ~N~0))) 1 0)) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-03 04:12:10,784 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 04:12:10,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:12:10,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-11-03 04:12:10,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619108996] [2022-11-03 04:12:10,784 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 04:12:10,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-03 04:12:10,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:12:10,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-03 04:12:10,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-11-03 04:12:10,786 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:11,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:12:11,188 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2022-11-03 04:12:11,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 04:12:11,188 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-03 04:12:11,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:12:11,189 INFO L225 Difference]: With dead ends: 60 [2022-11-03 04:12:11,189 INFO L226 Difference]: Without dead ends: 29 [2022-11-03 04:12:11,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 36 SyntacticMatches, 17 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2022-11-03 04:12:11,190 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:12:11,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 14 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 04:12:11,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-03 04:12:11,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-03 04:12:11,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:11,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-11-03 04:12:11,216 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 25 [2022-11-03 04:12:11,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:12:11,216 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-11-03 04:12:11,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:11,216 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-11-03 04:12:11,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-03 04:12:11,217 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:12:11,217 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:12:11,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 04:12:11,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 04:12:11,438 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:12:11,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:12:11,439 INFO L85 PathProgramCache]: Analyzing trace with hash 616366677, now seen corresponding path program 13 times [2022-11-03 04:12:11,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:12:11,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624638652] [2022-11-03 04:12:11,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:11,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:12:11,466 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 04:12:11,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1671886301] [2022-11-03 04:12:11,466 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 04:12:11,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:12:11,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:12:11,469 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:12:11,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03dbfa76-6b34-4cf2-a1c4-f82fa60954d6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 04:12:11,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:11,676 WARN L261 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 140 conjunts are in the unsatisfiable core [2022-11-03 04:12:11,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:11,705 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 04:12:11,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:11,740 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 04:12:11,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:11,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:11,785 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 31 treesize of output 33 [2022-11-03 04:12:11,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:11,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:11,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:11,846 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-03 04:12:11,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:11,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:11,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:11,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:11,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:11,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:11,908 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 57 [2022-11-03 04:12:11,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:11,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:11,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:11,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:11,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:11,993 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 66 [2022-11-03 04:12:12,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:12,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:12,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:12:12,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:12,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:12,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:12,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 76 [2022-11-03 04:12:12,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:12,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:12,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:12,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:12,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:12:12,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:12,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:12,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 79 [2022-11-03 04:12:12,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:12,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:12,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:12,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:12,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:12:12,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:12,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:12,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:12,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:12,403 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 84 [2022-11-03 04:12:12,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:12,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:12,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:12,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:12,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:12,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 74 [2022-11-03 04:12:12,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:12,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:12,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:12,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:12,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:12,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 73 [2022-11-03 04:12:12,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:12,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:12,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:12:12,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:12,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:12,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:12,907 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 78 [2022-11-03 04:12:13,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:13,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:13,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:13,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:13,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:13,064 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 75 [2022-11-03 04:12:13,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:13,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:13,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:13,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:13,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:13,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:13,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:12:13,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:13,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:13,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:13,193 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 74 [2022-11-03 04:12:13,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:13,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:13,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:13,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:13,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:13,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:13,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:13,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:13,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:12:13,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:13,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:13,355 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 77 [2022-11-03 04:12:13,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:13,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:13,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:13,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:13,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:13,498 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 71 [2022-11-03 04:12:13,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:13,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:13,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:13,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:13,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:13,650 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2022-11-03 04:12:13,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:13,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:13,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:13,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:13,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:13,789 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 71 [2022-11-03 04:12:13,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:13,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:13,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:13,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:13,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:13,966 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 71 [2022-11-03 04:12:14,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:14,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:14,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:14,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:14,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:14,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:14,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:12:14,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:14,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:14,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:14,148 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 74 [2022-11-03 04:12:14,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:14,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:14,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:14,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:14,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:14,311 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 73 [2022-11-03 04:12:14,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:14,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 68 [2022-11-03 04:12:14,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:12:14,589 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 45 [2022-11-03 04:12:14,670 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:12:14,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:15:48,895 WARN L833 $PredicateComparison]: unable to prove that (forall ((~N~0 Int)) (or (= (let ((.cse6 (+ 32 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse7 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 24)) (.cse8 (+ 16 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse9 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse0 (let ((.cse24 (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))) (let ((.cse22 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse24))) (let ((.cse23 (select .cse22 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse16 (select .cse23 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse21 (select .cse24 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse18 (select (select (store .cse22 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse23 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse16 .cse21))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse9))) (let ((.cse17 (select (select (store .cse22 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse23 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse16 .cse18 .cse21))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse8))) (let ((.cse20 (select (select (store .cse22 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse23 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse16 .cse17 .cse18 .cse21))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse7))) (let ((.cse19 (select (select (store .cse22 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse23 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse16 .cse17 .cse18 .cse20 .cse21))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse6))) (let ((.cse10 (store .cse22 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse23 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse16 .cse17 .cse18 .cse19 .cse20 .cse21))))) (store .cse10 |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse12 (select .cse10 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse11 (let ((.cse13 (let ((.cse14 (let ((.cse15 (store .cse12 |c_ULTIMATE.start_main_~a~0#1.offset| (+ .cse16 (select .cse12 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse17 .cse18 .cse19 .cse20 .cse21)))) (store .cse15 .cse9 (+ (select (select (store .cse10 |c_ULTIMATE.start_main_~a~0#1.base| .cse15) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse12 .cse9)))))) (store .cse14 .cse8 (+ (select (select (store .cse10 |c_ULTIMATE.start_main_~a~0#1.base| .cse14) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse12 .cse8)))))) (store .cse13 .cse7 (+ (select .cse12 .cse7) (select (select (store .cse10 |c_ULTIMATE.start_main_~a~0#1.base| .cse13) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))) (store .cse11 .cse6 (+ (select (select (store .cse10 |c_ULTIMATE.start_main_~a~0#1.base| .cse11) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse12 .cse6))))))))))))))))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse3 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| 0)) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse5 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse3)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse9))) (let ((.cse2 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse3 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse8))) (let ((.cse4 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse3 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse7))) (+ (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse3 .cse4 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse6) .cse2 .cse3 .cse4 .cse5)))))))) (+ ~N~0 (* ~N~0 ~N~0))) (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) ~N~0) (not (< |c_ULTIMATE.start_main_~i~0#1| ~N~0)))) is different from false