./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 e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/ss4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0 --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-e04fb08 [2022-11-16 20:36:53,610 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 20:36:53,612 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 20:36:53,655 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 20:36:53,657 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 20:36:53,660 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 20:36:53,664 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 20:36:53,666 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 20:36:53,668 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 20:36:53,673 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 20:36:53,675 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 20:36:53,676 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 20:36:53,678 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 20:36:53,682 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 20:36:53,683 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 20:36:53,685 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 20:36:53,687 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 20:36:53,693 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 20:36:53,695 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 20:36:53,696 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 20:36:53,698 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 20:36:53,699 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 20:36:53,700 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 20:36:53,701 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 20:36:53,705 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 20:36:53,710 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 20:36:53,710 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 20:36:53,712 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 20:36:53,713 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 20:36:53,715 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 20:36:53,715 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 20:36:53,716 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 20:36:53,717 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 20:36:53,719 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 20:36:53,721 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 20:36:53,722 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 20:36:53,723 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 20:36:53,723 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 20:36:53,723 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 20:36:53,724 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 20:36:53,725 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 20:36:53,726 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 20:36:53,773 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 20:36:53,773 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 20:36:53,774 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 20:36:53,774 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 20:36:53,775 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 20:36:53,776 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 20:36:53,776 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 20:36:53,776 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 20:36:53,776 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 20:36:53,777 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 20:36:53,778 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 20:36:53,778 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 20:36:53,779 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 20:36:53,779 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 20:36:53,779 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 20:36:53,779 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 20:36:53,780 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 20:36:53,780 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 20:36:53,781 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 20:36:53,781 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 20:36:53,781 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 20:36:53,782 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 20:36:53,782 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 20:36:53,783 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 20:36:53,784 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 20:36:53,784 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 20:36:53,784 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 20:36:53,785 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 20:36:53,785 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 20:36:53,785 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 20:36:53,785 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 20:36:53,786 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 20:36:53,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:36:53,792 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 20:36:53,793 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 20:36:53,793 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 20:36:53,793 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 20:36:53,793 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 20:36:53,793 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 20:36:53,794 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 20:36:53,794 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 20:36:53,794 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_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb671fec0d42514b04873418e954f5a2df95ef7f393045434a478c03667a31d2 [2022-11-16 20:36:54,027 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 20:36:54,050 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 20:36:54,052 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 20:36:54,054 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 20:36:54,055 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 20:36:54,056 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/array-fpi/ss4.c [2022-11-16 20:36:54,128 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/data/4644cca92/daf7b3f29b6540bb9004727852f96969/FLAG65e823ee1 [2022-11-16 20:36:54,643 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 20:36:54,643 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/sv-benchmarks/c/array-fpi/ss4.c [2022-11-16 20:36:54,650 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/data/4644cca92/daf7b3f29b6540bb9004727852f96969/FLAG65e823ee1 [2022-11-16 20:36:55,009 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/data/4644cca92/daf7b3f29b6540bb9004727852f96969 [2022-11-16 20:36:55,013 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 20:36:55,018 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 20:36:55,020 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 20:36:55,020 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 20:36:55,024 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 20:36:55,025 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:36:55" (1/1) ... [2022-11-16 20:36:55,027 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f1e0b0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:36:55, skipping insertion in model container [2022-11-16 20:36:55,028 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:36:55" (1/1) ... [2022-11-16 20:36:55,036 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 20:36:55,053 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 20:36:55,287 WARN L229 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_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/sv-benchmarks/c/array-fpi/ss4.c[586,599] [2022-11-16 20:36:55,311 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:36:55,318 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 20:36:55,330 WARN L229 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_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/sv-benchmarks/c/array-fpi/ss4.c[586,599] [2022-11-16 20:36:55,339 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:36:55,352 INFO L208 MainTranslator]: Completed translation [2022-11-16 20:36:55,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:36:55 WrapperNode [2022-11-16 20:36:55,353 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 20:36:55,354 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 20:36:55,354 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 20:36:55,354 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 20:36:55,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:36:55" (1/1) ... [2022-11-16 20:36:55,373 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:36:55" (1/1) ... [2022-11-16 20:36:55,396 INFO L138 Inliner]: procedures = 17, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 96 [2022-11-16 20:36:55,396 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 20:36:55,397 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 20:36:55,397 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 20:36:55,397 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 20:36:55,406 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:36:55" (1/1) ... [2022-11-16 20:36:55,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:36:55" (1/1) ... [2022-11-16 20:36:55,409 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:36:55" (1/1) ... [2022-11-16 20:36:55,409 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:36:55" (1/1) ... [2022-11-16 20:36:55,416 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:36:55" (1/1) ... [2022-11-16 20:36:55,420 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:36:55" (1/1) ... [2022-11-16 20:36:55,421 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:36:55" (1/1) ... [2022-11-16 20:36:55,422 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:36:55" (1/1) ... [2022-11-16 20:36:55,424 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 20:36:55,425 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 20:36:55,426 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 20:36:55,426 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 20:36:55,427 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:36:55" (1/1) ... [2022-11-16 20:36:55,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:36:55,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:36:55,458 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 20:36:55,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 20:36:55,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 20:36:55,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 20:36:55,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 20:36:55,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 20:36:55,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 20:36:55,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 20:36:55,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 20:36:55,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 20:36:55,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 20:36:55,585 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 20:36:55,588 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 20:36:55,821 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 20:36:55,931 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 20:36:55,931 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-16 20:36:55,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:36:55 BoogieIcfgContainer [2022-11-16 20:36:55,934 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 20:36:55,936 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 20:36:55,936 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 20:36:55,940 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 20:36:55,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:36:55" (1/3) ... [2022-11-16 20:36:55,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73ddb47c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:36:55, skipping insertion in model container [2022-11-16 20:36:55,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:36:55" (2/3) ... [2022-11-16 20:36:55,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73ddb47c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:36:55, skipping insertion in model container [2022-11-16 20:36:55,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:36:55" (3/3) ... [2022-11-16 20:36:55,943 INFO L112 eAbstractionObserver]: Analyzing ICFG ss4.c [2022-11-16 20:36:55,978 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 20:36:55,978 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 20:36:56,050 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 20:36:56,060 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;@2f7d7224, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 20:36:56,060 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 20:36:56,064 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) [2022-11-16 20:36:56,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 20:36:56,071 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:36:56,073 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:36:56,074 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:36:56,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:36:56,083 INFO L85 PathProgramCache]: Analyzing trace with hash -228288665, now seen corresponding path program 1 times [2022-11-16 20:36:56,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:36:56,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26364797] [2022-11-16 20:36:56,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:36:56,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:36:56,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:36:56,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:36:56,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26364797] [2022-11-16 20:36:56,280 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-16 20:36:56,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927652896] [2022-11-16 20:36:56,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:36:56,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:36:56,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:36:56,284 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:36:56,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 20:36:56,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:36:56,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 20:36:56,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:36:56,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:36:56,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:36:56,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927652896] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:36:56,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:36:56,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:36:56,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853394241] [2022-11-16 20:36:56,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:36:56,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:36:56,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:36:56,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:36:56,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:36:56,558 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) [2022-11-16 20:36:56,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:36:56,657 INFO L93 Difference]: Finished difference Result 22 states and 31 transitions. [2022-11-16 20:36:56,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:36:56,660 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 [2022-11-16 20:36:56,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:36:56,668 INFO L225 Difference]: With dead ends: 22 [2022-11-16 20:36:56,668 INFO L226 Difference]: Without dead ends: 10 [2022-11-16 20:36:56,671 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 [2022-11-16 20:36:56,675 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-11-16 20:36:56,676 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] [2022-11-16 20:36:56,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-16 20:36:56,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-11-16 20:36:56,726 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) [2022-11-16 20:36:56,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2022-11-16 20:36:56,728 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 8 [2022-11-16 20:36:56,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:36:56,728 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2022-11-16 20:36:56,728 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) [2022-11-16 20:36:56,729 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2022-11-16 20:36:56,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 20:36:56,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:36:56,729 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:36:56,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 20:36:56,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-16 20:36:56,936 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:36:56,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:36:56,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1111661393, now seen corresponding path program 1 times [2022-11-16 20:36:56,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:36:56,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358302612] [2022-11-16 20:36:56,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:36:56,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:36:56,964 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:36:56,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [894271971] [2022-11-16 20:36:56,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:36:56,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:36:56,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:36:56,967 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:36:56,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 20:36:57,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:36:57,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 20:36:57,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:36:57,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:36:57,085 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:36:57,086 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:36:57,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358302612] [2022-11-16 20:36:57,088 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:36:57,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894271971] [2022-11-16 20:36:57,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894271971] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:36:57,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:36:57,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:36:57,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338431694] [2022-11-16 20:36:57,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:36:57,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:36:57,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:36:57,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:36:57,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:36:57,096 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) [2022-11-16 20:36:57,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:36:57,147 INFO L93 Difference]: Finished difference Result 18 states and 25 transitions. [2022-11-16 20:36:57,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 20:36:57,148 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 [2022-11-16 20:36:57,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:36:57,148 INFO L225 Difference]: With dead ends: 18 [2022-11-16 20:36:57,149 INFO L226 Difference]: Without dead ends: 13 [2022-11-16 20:36:57,149 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 [2022-11-16 20:36:57,152 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 10 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:36:57,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 4 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 20:36:57,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-16 20:36:57,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-16 20:36:57,161 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) [2022-11-16 20:36:57,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2022-11-16 20:36:57,162 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 9 [2022-11-16 20:36:57,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:36:57,162 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2022-11-16 20:36:57,162 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) [2022-11-16 20:36:57,163 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2022-11-16 20:36:57,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 20:36:57,163 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:36:57,163 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:36:57,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 20:36:57,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:36:57,369 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:36:57,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:36:57,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1860477013, now seen corresponding path program 1 times [2022-11-16 20:36:57,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:36:57,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926539109] [2022-11-16 20:36:57,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:36:57,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:36:57,445 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:36:57,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [782930519] [2022-11-16 20:36:57,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:36:57,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:36:57,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:36:57,455 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:36:57,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 20:36:57,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:36:57,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-16 20:36:57,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:36:57,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 20:36:57,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 20:36:57,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-16 20:36:57,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-16 20:36:57,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-16 20:36:57,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 23 [2022-11-16 20:36:58,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-16 20:36:58,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 31 [2022-11-16 20:36:58,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:36:58,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:37:00,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:37:00,824 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:37:00,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926539109] [2022-11-16 20:37:00,824 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:37:00,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782930519] [2022-11-16 20:37:00,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782930519] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:37:00,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1059046773] [2022-11-16 20:37:00,843 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-16 20:37:00,844 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:37:00,847 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:37:00,853 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:37:00,854 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:37:00,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:00,944 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 20:37:00,945 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:37:00,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:00,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:00,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:01,073 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-16 20:37:01,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-16 20:37:01,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:01,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:01,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-16 20:37:01,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:01,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:01,191 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:37:01,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:01,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:01,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:01,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:01,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:01,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:37:01,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:01,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:01,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:01,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:01,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:01,463 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-16 20:37:01,464 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:37:01,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 20:37:01,659 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 20:37:01,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 20:37:01,759 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:37:01,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:37:01,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:37:01,846 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 20:37:01,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-11-16 20:37:01,963 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-16 20:37:01,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-16 20:37:02,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 20:37:02,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:37:02,067 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-16 20:37:02,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 33 [2022-11-16 20:37:02,168 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:37:02,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:37:02,206 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:37:03,071 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '249#(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 [2022-11-16 20:37:03,071 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:37:03,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:37:03,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-11-16 20:37:03,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629782159] [2022-11-16 20:37:03,072 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:37:03,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 20:37:03,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:37:03,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 20:37:03,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=479, Unknown=1, NotChecked=0, Total=552 [2022-11-16 20:37:03,079 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 20 states, 20 states have (on average 1.1) internal successors, (22), 20 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) [2022-11-16 20:37:03,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:37:03,838 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2022-11-16 20:37:03,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 20:37:03,839 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.1) internal successors, (22), 20 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 12 [2022-11-16 20:37:03,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:37:03,839 INFO L225 Difference]: With dead ends: 27 [2022-11-16 20:37:03,839 INFO L226 Difference]: Without dead ends: 21 [2022-11-16 20:37:03,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=88, Invalid=613, Unknown=1, NotChecked=0, Total=702 [2022-11-16 20:37:03,841 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 20:37:03,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 23 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 156 Invalid, 0 Unknown, 13 Unchecked, 0.4s Time] [2022-11-16 20:37:03,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-16 20:37:03,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2022-11-16 20:37:03,848 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) [2022-11-16 20:37:03,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2022-11-16 20:37:03,849 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 12 [2022-11-16 20:37:03,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:37:03,849 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2022-11-16 20:37:03,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.1) internal successors, (22), 20 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) [2022-11-16 20:37:03,849 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2022-11-16 20:37:03,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 20:37:03,850 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:37:03,850 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:37:03,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 20:37:04,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:37:04,051 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:37:04,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:37:04,051 INFO L85 PathProgramCache]: Analyzing trace with hash -689266881, now seen corresponding path program 2 times [2022-11-16 20:37:04,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:37:04,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466730286] [2022-11-16 20:37:04,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:37:04,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:37:04,092 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:37:04,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1899536366] [2022-11-16 20:37:04,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:37:04,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:37:04,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:37:04,100 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:37:04,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 20:37:04,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 20:37:04,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:37:04,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 20:37:04,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:37:04,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 20:37:04,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:37:04,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 20:37:04,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:37:04,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466730286] [2022-11-16 20:37:04,275 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:37:04,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899536366] [2022-11-16 20:37:04,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899536366] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:37:04,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2070699014] [2022-11-16 20:37:04,277 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-16 20:37:04,277 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:37:04,277 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:37:04,278 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:37:04,278 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:37:04,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:04,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:04,441 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-16 20:37:04,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 57 [2022-11-16 20:37:04,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:04,499 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 20:37:04,499 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:37:04,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:04,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:04,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:04,629 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-16 20:37:04,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-16 20:37:04,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:04,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:04,685 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:37:04,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:04,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:04,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:04,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:04,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:04,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:37:04,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:37:04,887 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-16 20:37:04,888 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:37:05,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 20:37:05,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:37:05,092 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 20:37:05,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 20:37:05,177 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:37:05,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:37:05,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:37:05,262 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 20:37:05,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 20:37:05,344 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-16 20:37:05,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-16 20:37:05,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 20:37:05,395 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-16 20:37:05,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 20:37:05,470 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:37:05,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:37:05,547 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:37:05,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:37:05,567 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:37:05,931 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '418#(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 [2022-11-16 20:37:05,931 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:37:05,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:37:05,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-16 20:37:05,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778618482] [2022-11-16 20:37:05,932 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:37:05,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 20:37:05,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:37:05,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 20:37:05,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-16 20:37:05,933 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) [2022-11-16 20:37:06,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:37:06,094 INFO L93 Difference]: Finished difference Result 31 states and 41 transitions. [2022-11-16 20:37:06,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 20:37:06,094 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 [2022-11-16 20:37:06,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:37:06,095 INFO L225 Difference]: With dead ends: 31 [2022-11-16 20:37:06,095 INFO L226 Difference]: Without dead ends: 24 [2022-11-16 20:37:06,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-16 20:37:06,096 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 12 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:37:06,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 8 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:37:06,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-16 20:37:06,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2022-11-16 20:37:06,104 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) [2022-11-16 20:37:06,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2022-11-16 20:37:06,105 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 13 [2022-11-16 20:37:06,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:37:06,105 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2022-11-16 20:37:06,105 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) [2022-11-16 20:37:06,105 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2022-11-16 20:37:06,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 20:37:06,106 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:37:06,106 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:37:06,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 20:37:06,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:37:06,312 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:37:06,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:37:06,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1839906970, now seen corresponding path program 3 times [2022-11-16 20:37:06,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:37:06,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16607398] [2022-11-16 20:37:06,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:37:06,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:37:06,360 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:37:06,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2098139979] [2022-11-16 20:37:06,360 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 20:37:06,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:37:06,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:37:06,361 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:37:06,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 20:37:06,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 20:37:06,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:37:06,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 20:37:06,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:37:06,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 20:37:06,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:37:06,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 20:37:06,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:37:06,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16607398] [2022-11-16 20:37:06,513 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:37:06,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098139979] [2022-11-16 20:37:06,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098139979] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:37:06,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [638896438] [2022-11-16 20:37:06,515 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-16 20:37:06,516 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:37:06,516 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:37:06,516 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:37:06,516 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:37:06,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:06,556 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 20:37:06,556 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:37:06,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:06,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:06,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:06,658 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-16 20:37:06,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-16 20:37:06,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:06,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:06,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-16 20:37:06,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:06,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:06,731 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:37:06,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:06,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:06,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:06,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:06,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:06,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:37:06,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:37:06,924 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-16 20:37:06,924 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:37:07,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 20:37:07,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:37:07,190 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-16 20:37:07,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 20:37:07,271 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:37:07,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:37:07,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:37:07,348 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 20:37:07,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-11-16 20:37:07,428 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-16 20:37:07,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-16 20:37:07,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 20:37:07,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:37:07,497 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-16 20:37:07,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 20:37:07,585 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:37:07,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:37:07,615 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:37:08,013 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '602#(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 [2022-11-16 20:37:08,014 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:37:08,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:37:08,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-16 20:37:08,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638102871] [2022-11-16 20:37:08,014 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:37:08,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 20:37:08,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:37:08,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 20:37:08,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-16 20:37:08,015 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) [2022-11-16 20:37:08,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:37:08,119 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2022-11-16 20:37:08,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 20:37:08,119 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 [2022-11-16 20:37:08,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:37:08,120 INFO L225 Difference]: With dead ends: 33 [2022-11-16 20:37:08,120 INFO L226 Difference]: Without dead ends: 17 [2022-11-16 20:37:08,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-11-16 20:37:08,121 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:37:08,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 8 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:37:08,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-16 20:37:08,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-16 20:37:08,127 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) [2022-11-16 20:37:08,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-11-16 20:37:08,127 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 13 [2022-11-16 20:37:08,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:37:08,127 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-11-16 20:37:08,128 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) [2022-11-16 20:37:08,128 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-11-16 20:37:08,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 20:37:08,128 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:37:08,128 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:37:08,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 20:37:08,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:37:08,329 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:37:08,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:37:08,330 INFO L85 PathProgramCache]: Analyzing trace with hash 664323303, now seen corresponding path program 4 times [2022-11-16 20:37:08,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:37:08,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402493747] [2022-11-16 20:37:08,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:37:08,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:37:08,373 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:37:08,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [123396457] [2022-11-16 20:37:08,373 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 20:37:08,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:37:08,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:37:08,377 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:37:08,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 20:37:08,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:37:08,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-16 20:37:08,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:37:08,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 20:37:08,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 20:37:08,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-16 20:37:08,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:08,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-16 20:37:08,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:08,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-11-16 20:37:08,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:08,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 35 [2022-11-16 20:37:08,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:37:08,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:08,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 44 [2022-11-16 20:37:08,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:08,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 39 [2022-11-16 20:37:08,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:08,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 41 [2022-11-16 20:37:08,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:37:08,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:08,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 44 [2022-11-16 20:37:08,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 37 [2022-11-16 20:37:09,087 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:37:09,127 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:37:09,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:37:14,318 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:37:14,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:37:14,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402493747] [2022-11-16 20:37:14,319 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:37:14,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123396457] [2022-11-16 20:37:14,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123396457] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:37:14,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [215267624] [2022-11-16 20:37:14,321 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-16 20:37:14,321 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:37:14,322 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:37:14,322 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:37:14,322 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:37:14,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:14,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:14,422 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-16 20:37:14,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 57 [2022-11-16 20:37:14,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:14,461 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 20:37:14,461 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:37:14,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:14,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:14,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:14,569 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-16 20:37:14,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-16 20:37:14,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:14,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:14,614 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:37:14,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:14,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:14,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:14,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:14,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:14,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:37:14,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:37:14,805 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-16 20:37:14,806 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:37:14,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 20:37:14,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:37:14,971 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-16 20:37:14,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 20:37:15,050 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:37:15,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:37:15,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:37:15,113 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 20:37:15,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 20:37:15,177 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-16 20:37:15,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-16 20:37:15,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 20:37:15,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:37:15,228 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-16 20:37:15,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 33 [2022-11-16 20:37:15,295 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:37:15,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:37:15,364 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:37:15,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:37:15,383 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:37:16,103 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '815#(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 [2022-11-16 20:37:16,103 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:37:16,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:37:16,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-11-16 20:37:16,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118394301] [2022-11-16 20:37:16,103 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:37:16,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 20:37:16,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:37:16,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 20:37:16,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2022-11-16 20:37:16,105 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 28 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 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) [2022-11-16 20:37:20,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:37:20,223 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2022-11-16 20:37:20,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-16 20:37:20,223 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 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 [2022-11-16 20:37:20,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:37:20,225 INFO L225 Difference]: With dead ends: 42 [2022-11-16 20:37:20,226 INFO L226 Difference]: Without dead ends: 38 [2022-11-16 20:37:20,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=123, Invalid=1209, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 20:37:20,227 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 7 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 213 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:37:20,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 38 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 120 Invalid, 0 Unknown, 213 Unchecked, 0.1s Time] [2022-11-16 20:37:20,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-16 20:37:20,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2022-11-16 20:37:20,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.34375) internal successors, (43), 32 states have internal predecessors, (43), 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) [2022-11-16 20:37:20,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-11-16 20:37:20,258 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 16 [2022-11-16 20:37:20,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:37:20,259 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-11-16 20:37:20,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 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) [2022-11-16 20:37:20,259 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-11-16 20:37:20,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 20:37:20,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:37:20,260 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:37:20,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 20:37:20,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:37:20,476 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:37:20,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:37:20,476 INFO L85 PathProgramCache]: Analyzing trace with hash -881119672, now seen corresponding path program 5 times [2022-11-16 20:37:20,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:37:20,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919397008] [2022-11-16 20:37:20,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:37:20,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:37:20,527 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:37:20,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [854931232] [2022-11-16 20:37:20,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:37:20,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:37:20,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:37:20,538 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:37:20,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 20:37:20,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 20:37:20,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:37:20,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 20:37:20,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:37:20,721 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 20:37:20,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:37:20,788 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 20:37:20,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:37:20,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919397008] [2022-11-16 20:37:20,789 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:37:20,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854931232] [2022-11-16 20:37:20,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854931232] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:37:20,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [350846296] [2022-11-16 20:37:20,791 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-16 20:37:20,792 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:37:20,792 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:37:20,792 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:37:20,792 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:37:20,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:20,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:20,884 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-16 20:37:20,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 57 [2022-11-16 20:37:20,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:20,921 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 20:37:20,921 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:37:20,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:20,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:20,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:21,046 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-16 20:37:21,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-16 20:37:21,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:21,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:21,090 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:37:21,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:21,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:21,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:21,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:21,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:21,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:37:21,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:37:21,277 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-16 20:37:21,278 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:37:21,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 20:37:21,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:37:21,548 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-16 20:37:21,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 20:37:21,636 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:37:21,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:37:21,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:37:21,695 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 20:37:21,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-11-16 20:37:21,771 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-16 20:37:21,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-16 20:37:21,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 20:37:21,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:37:21,833 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-16 20:37:21,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 20:37:21,906 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:37:21,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:37:21,934 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:37:22,333 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1073#(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 [2022-11-16 20:37:22,334 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:37:22,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:37:22,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-16 20:37:22,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781518320] [2022-11-16 20:37:22,334 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:37:22,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 20:37:22,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:37:22,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 20:37:22,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-16 20:37:22,335 INFO L87 Difference]: Start difference. First operand 33 states and 43 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) [2022-11-16 20:37:22,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:37:22,527 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2022-11-16 20:37:22,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 20:37:22,531 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 [2022-11-16 20:37:22,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:37:22,532 INFO L225 Difference]: With dead ends: 62 [2022-11-16 20:37:22,532 INFO L226 Difference]: Without dead ends: 38 [2022-11-16 20:37:22,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2022-11-16 20:37:22,534 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 19 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:37:22,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 12 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:37:22,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-16 20:37:22,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2022-11-16 20:37:22,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:37:22,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2022-11-16 20:37:22,553 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 17 [2022-11-16 20:37:22,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:37:22,554 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2022-11-16 20:37:22,554 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) [2022-11-16 20:37:22,554 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2022-11-16 20:37:22,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 20:37:22,555 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:37:22,556 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:37:22,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 20:37:22,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:37:22,759 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:37:22,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:37:22,759 INFO L85 PathProgramCache]: Analyzing trace with hash -231139271, now seen corresponding path program 6 times [2022-11-16 20:37:22,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:37:22,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966484697] [2022-11-16 20:37:22,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:37:22,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:37:22,784 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:37:22,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [607382529] [2022-11-16 20:37:22,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 20:37:22,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:37:22,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:37:22,786 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:37:22,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 20:37:22,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 20:37:22,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:37:22,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 20:37:22,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:37:22,948 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 20:37:22,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:37:22,997 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 20:37:22,997 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:37:22,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966484697] [2022-11-16 20:37:22,997 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:37:22,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607382529] [2022-11-16 20:37:22,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607382529] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:37:22,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [937779950] [2022-11-16 20:37:23,000 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-16 20:37:23,000 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:37:23,000 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:37:23,000 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:37:23,000 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:37:23,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:23,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:23,113 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-16 20:37:23,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 57 [2022-11-16 20:37:23,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:23,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:23,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:23,210 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-16 20:37:23,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-16 20:37:23,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:23,229 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:37:23,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:23,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:23,270 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:37:23,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:23,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:23,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:23,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:23,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:23,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:37:23,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:37:23,443 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-16 20:37:23,444 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:37:23,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 20:37:23,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:37:23,620 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 20:37:23,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 20:37:23,699 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:37:23,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:37:23,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:37:23,760 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 20:37:23,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-11-16 20:37:23,835 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-16 20:37:23,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-16 20:37:23,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 20:37:23,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:37:23,897 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-16 20:37:23,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 33 [2022-11-16 20:37:23,966 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:37:23,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:37:24,001 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:37:24,355 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1366#(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 [2022-11-16 20:37:24,355 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:37:24,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:37:24,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-16 20:37:24,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485649051] [2022-11-16 20:37:24,356 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:37:24,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 20:37:24,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:37:24,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 20:37:24,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-11-16 20:37:24,357 INFO L87 Difference]: Start difference. First operand 31 states and 38 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) [2022-11-16 20:37:24,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:37:24,510 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2022-11-16 20:37:24,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 20:37:24,510 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 18 [2022-11-16 20:37:24,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:37:24,511 INFO L225 Difference]: With dead ends: 35 [2022-11-16 20:37:24,511 INFO L226 Difference]: Without dead ends: 26 [2022-11-16 20:37:24,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2022-11-16 20:37:24,512 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 20 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:37:24,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 8 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:37:24,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-16 20:37:24,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2022-11-16 20:37:24,521 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) [2022-11-16 20:37:24,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-11-16 20:37:24,521 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 18 [2022-11-16 20:37:24,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:37:24,522 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-11-16 20:37:24,522 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) [2022-11-16 20:37:24,522 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-11-16 20:37:24,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 20:37:24,523 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:37:24,523 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:37:24,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 20:37:24,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-16 20:37:24,728 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:37:24,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:37:24,728 INFO L85 PathProgramCache]: Analyzing trace with hash 449636693, now seen corresponding path program 7 times [2022-11-16 20:37:24,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:37:24,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437728360] [2022-11-16 20:37:24,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:37:24,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:37:24,752 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:37:24,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [157804385] [2022-11-16 20:37:24,752 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 20:37:24,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:37:24,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:37:24,754 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:37:24,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 20:37:24,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:37:24,887 WARN L261 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-16 20:37:24,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:37:24,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 20:37:24,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 20:37:24,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-16 20:37:24,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-11-16 20:37:25,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:25,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:25,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-16 20:37:25,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:25,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:25,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 47 [2022-11-16 20:37:25,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:25,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:25,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:25,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:25,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:37:25,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 50 [2022-11-16 20:37:25,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:25,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:25,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 49 [2022-11-16 20:37:25,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:25,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:25,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 52 [2022-11-16 20:37:25,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:25,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:25,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 54 [2022-11-16 20:37:25,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:25,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:25,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 53 [2022-11-16 20:37:25,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:25,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:25,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 51 [2022-11-16 20:37:25,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:25,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:37:25,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:25,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 52 [2022-11-16 20:37:25,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:25,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:37:25,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:37:25,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 55 [2022-11-16 20:37:25,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 43 [2022-11-16 20:37:25,956 INFO L350 Elim1Store]: Elim1 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 61 treesize of output 37 [2022-11-16 20:37:25,996 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:37:25,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:38:37,842 WARN L833 $PredicateComparison]: unable to prove that (forall ((~N~0 Int)) (or (< (+ 3 |c_ULTIMATE.start_main_~i~0#1|) ~N~0) (not (< (+ 2 |c_ULTIMATE.start_main_~i~0#1|) ~N~0)) (= (let ((.cse4 (+ 16 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse5 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse0 (let ((.cse16 (let ((.cse17 (* 8 |c_ULTIMATE.start_main_~i~0#1|))) (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse17 |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (+ .cse17 8 |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (+ .cse17 16 |c_ULTIMATE.start_main_~a~0#1.offset|) 1)))) (let ((.cse14 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse16))) (let ((.cse15 (select .cse14 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse10 (select .cse15 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse11 (select .cse16 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse12 (select (select (store .cse14 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse15 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse10 .cse11))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5))) (let ((.cse13 (select (select (store .cse14 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse15 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse10 .cse11 .cse12))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse4))) (let ((.cse6 (store .cse14 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse15 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse10 .cse11 .cse12 .cse13))))) (store .cse6 |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse8 (select .cse6 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse7 (let ((.cse9 (store .cse8 |c_ULTIMATE.start_main_~a~0#1.offset| (+ .cse10 .cse11 .cse12 .cse13 (select .cse8 |c_ULTIMATE.start_main_~a~0#1.offset|))))) (store .cse9 .cse5 (+ (select .cse8 .cse5) (select (select (store .cse6 |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|)))))) (store .cse7 .cse4 (+ (select .cse8 .cse4) (select (select (store .cse6 |c_ULTIMATE.start_main_~a~0#1.base| .cse7) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))))))))))))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse2 (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 ((.cse3 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse2)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5))) (+ (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse3))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse4) .cse2 .cse3)))))) (+ ~N~0 (* ~N~0 ~N~0))))) is different from false [2022-11-16 20:38:38,039 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-11-16 20:38:38,040 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:38:38,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437728360] [2022-11-16 20:38:38,040 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:38:38,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157804385] [2022-11-16 20:38:38,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157804385] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:38:38,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2089564788] [2022-11-16 20:38:38,047 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-16 20:38:38,047 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:38:38,048 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:38:38,048 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:38:38,048 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:38:38,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:38:38,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:38:38,152 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-16 20:38:38,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 57 [2022-11-16 20:38:38,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:38:38,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:38:38,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:38:38,265 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-16 20:38:38,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-16 20:38:38,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:38:38,290 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:38:38,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:38:38,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:38:38,340 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:38:38,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:38:38,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:38:38,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:38:38,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:38:38,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:38:38,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:38:38,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:38:38,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:38:38,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:38:38,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:38:38,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:38:38,479 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-16 20:38:38,480 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:38:38,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 20:38:38,599 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 20:38:38,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 20:38:38,664 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:38:38,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:38:38,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:38:38,744 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 20:38:38,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-11-16 20:38:38,815 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-16 20:38:38,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-16 20:38:38,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 20:38:38,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:38:38,881 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-16 20:38:38,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 20:38:38,950 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:38:38,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:38:38,975 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:38:42,548 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1630#(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 [2022-11-16 20:38:42,549 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:38:42,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:38:42,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2022-11-16 20:38:42,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546513098] [2022-11-16 20:38:42,549 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:38:42,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-16 20:38:42,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:38:42,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-16 20:38:42,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1351, Unknown=15, NotChecked=74, Total=1560 [2022-11-16 20:38:42,551 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 36 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:39:06,707 WARN L233 SmtUtils]: Spent 14.80s on a formula simplification. DAG size of input: 139 DAG size of output: 138 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 20:39:48,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:39:48,741 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2022-11-16 20:39:48,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 20:39:48,741 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-16 20:39:48,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:39:48,742 INFO L225 Difference]: With dead ends: 45 [2022-11-16 20:39:48,742 INFO L226 Difference]: Without dead ends: 37 [2022-11-16 20:39:48,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 8 SyntacticMatches, 12 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 133.0s TimeCoverageRelationStatistics Valid=162, Invalid=1802, Unknown=20, NotChecked=86, Total=2070 [2022-11-16 20:39:48,744 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-16 20:39:48,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 55 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 463 Invalid, 0 Unknown, 95 Unchecked, 6.7s Time] [2022-11-16 20:39:48,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-16 20:39:48,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2022-11-16 20:39:48,762 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) [2022-11-16 20:39:48,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-11-16 20:39:48,763 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 20 [2022-11-16 20:39:48,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:39:48,763 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-11-16 20:39:48,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:39:48,764 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-11-16 20:39:48,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 20:39:48,764 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:39:48,764 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:39:48,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 20:39:48,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:39:48,965 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:39:48,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:39:48,966 INFO L85 PathProgramCache]: Analyzing trace with hash 444751423, now seen corresponding path program 8 times [2022-11-16 20:39:48,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:39:48,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130819207] [2022-11-16 20:39:48,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:39:48,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:39:48,999 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:39:48,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1350454627] [2022-11-16 20:39:49,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:39:49,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:39:49,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:39:49,001 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:39:49,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 20:39:49,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 20:39:49,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:39:49,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 20:39:49,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:39:49,244 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 20:39:49,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:39:49,339 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 20:39:49,339 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:39:49,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130819207] [2022-11-16 20:39:49,339 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:39:49,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350454627] [2022-11-16 20:39:49,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350454627] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:39:49,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [321615554] [2022-11-16 20:39:49,341 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-16 20:39:49,341 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:39:49,341 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:39:49,341 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:39:49,341 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:39:49,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:49,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:49,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:49,438 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-16 20:39:49,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-16 20:39:49,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:49,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:49,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-16 20:39:49,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:49,480 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:39:49,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:49,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:49,520 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:39:49,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:49,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:49,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:49,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:49,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:49,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:39:49,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:49,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:49,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:49,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:49,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:49,700 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-16 20:39:49,701 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:39:49,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 20:39:49,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:39:49,825 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-16 20:39:49,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 20:39:49,893 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:39:49,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:39:49,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:39:49,955 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 20:39:49,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 20:39:50,020 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-16 20:39:50,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-16 20:39:50,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 20:39:50,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:39:50,069 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-16 20:39:50,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 33 [2022-11-16 20:39:50,154 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:39:50,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:39:50,241 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:39:50,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:39:50,258 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:39:50,644 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1919#(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 [2022-11-16 20:39:50,644 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:39:50,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:39:50,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-11-16 20:39:50,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538244287] [2022-11-16 20:39:50,644 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:39:50,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 20:39:50,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:39:50,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 20:39:50,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-11-16 20:39:50,646 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) [2022-11-16 20:39:50,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:39:50,959 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2022-11-16 20:39:50,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 20:39:50,960 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 [2022-11-16 20:39:50,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:39:50,961 INFO L225 Difference]: With dead ends: 51 [2022-11-16 20:39:50,961 INFO L226 Difference]: Without dead ends: 40 [2022-11-16 20:39:50,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 35 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2022-11-16 20:39:50,962 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 12 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:39:50,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 12 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 20:39:50,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-16 20:39:50,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2022-11-16 20:39:50,982 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) [2022-11-16 20:39:50,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2022-11-16 20:39:50,983 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 21 [2022-11-16 20:39:50,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:39:50,983 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2022-11-16 20:39:50,983 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) [2022-11-16 20:39:50,984 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-11-16 20:39:50,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 20:39:50,984 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:39:50,984 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:39:50,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 20:39:51,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:39:51,190 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:39:51,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:39:51,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1053530010, now seen corresponding path program 9 times [2022-11-16 20:39:51,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:39:51,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117791377] [2022-11-16 20:39:51,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:39:51,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:39:51,224 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:39:51,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [184457411] [2022-11-16 20:39:51,225 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 20:39:51,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:39:51,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:39:51,226 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:39:51,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 20:39:51,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 20:39:51,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:39:51,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 20:39:51,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:39:51,406 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 20:39:51,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:39:51,485 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 20:39:51,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:39:51,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117791377] [2022-11-16 20:39:51,485 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:39:51,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184457411] [2022-11-16 20:39:51,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184457411] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:39:51,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1216145774] [2022-11-16 20:39:51,487 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-16 20:39:51,487 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:39:51,488 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:39:51,488 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:39:51,488 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:39:51,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:51,526 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 20:39:51,527 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:39:51,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:51,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:51,646 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-16 20:39:51,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 57 [2022-11-16 20:39:51,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:51,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:51,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:51,748 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-16 20:39:51,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-16 20:39:51,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:51,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:51,789 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:39:51,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:51,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:51,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:51,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:51,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:51,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:39:51,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:39:51,954 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-16 20:39:51,954 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:39:52,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 20:39:52,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:39:52,167 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-16 20:39:52,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 20:39:52,252 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:39:52,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:39:52,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:39:52,325 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 20:39:52,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 20:39:52,401 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-16 20:39:52,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-16 20:39:52,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 20:39:52,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:39:52,458 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-16 20:39:52,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 33 [2022-11-16 20:39:52,528 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:39:52,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:39:52,595 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:39:52,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:39:52,611 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:39:52,957 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2225#(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 [2022-11-16 20:39:52,957 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:39:52,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:39:52,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-11-16 20:39:52,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633404690] [2022-11-16 20:39:52,958 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:39:52,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 20:39:52,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:39:52,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 20:39:52,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-11-16 20:39:52,960 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) [2022-11-16 20:39:53,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:39:53,180 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2022-11-16 20:39:53,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 20:39:53,181 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 [2022-11-16 20:39:53,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:39:53,181 INFO L225 Difference]: With dead ends: 51 [2022-11-16 20:39:53,181 INFO L226 Difference]: Without dead ends: 25 [2022-11-16 20:39:53,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2022-11-16 20:39:53,182 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:39:53,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 16 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:39:53,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-16 20:39:53,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-16 20:39:53,199 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) [2022-11-16 20:39:53,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-11-16 20:39:53,199 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 21 [2022-11-16 20:39:53,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:39:53,200 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-11-16 20:39:53,200 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) [2022-11-16 20:39:53,200 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-11-16 20:39:53,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-16 20:39:53,201 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:39:53,201 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:39:53,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 20:39:53,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:39:53,406 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:39:53,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:39:53,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1463476839, now seen corresponding path program 10 times [2022-11-16 20:39:53,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:39:53,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189634452] [2022-11-16 20:39:53,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:39:53,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:39:53,432 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:39:53,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1970668710] [2022-11-16 20:39:53,432 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 20:39:53,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:39:53,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:39:53,434 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:39:53,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 20:39:53,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:39:53,608 WARN L261 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 121 conjunts are in the unsatisfiable core [2022-11-16 20:39:53,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:39:53,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 20:39:53,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 20:39:53,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-16 20:39:53,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:53,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-16 20:39:53,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:53,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:53,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-16 20:39:53,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:53,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:53,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:53,788 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:39:53,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:53,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:39:53,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:53,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:53,926 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:39:54,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:54,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:54,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:39:54,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:54,005 INFO L350 Elim1Store]: Elim1 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 82 treesize of output 67 [2022-11-16 20:39:54,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:54,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:54,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:54,101 INFO L350 Elim1Store]: Elim1 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 85 treesize of output 63 [2022-11-16 20:39:54,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:54,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:54,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:54,202 INFO L350 Elim1Store]: Elim1 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 86 treesize of output 64 [2022-11-16 20:39:54,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:54,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:39:54,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:54,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:54,350 INFO L350 Elim1Store]: Elim1 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 73 treesize of output 64 [2022-11-16 20:39:54,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:54,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:54,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:39:54,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:54,437 INFO L350 Elim1Store]: Elim1 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 78 treesize of output 67 [2022-11-16 20:39:54,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:54,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:54,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:54,522 INFO L350 Elim1Store]: Elim1 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 75 treesize of output 61 [2022-11-16 20:39:54,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:54,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:54,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:54,623 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:39:54,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:54,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:54,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:54,709 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:39:54,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:54,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:54,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:54,806 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:39:54,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:54,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:54,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:54,906 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:39:55,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:55,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:55,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:55,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:55,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:39:55,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:55,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:39:55,016 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:39:55,125 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:39:55,228 INFO L350 Elim1Store]: Elim1 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 85 treesize of output 45 [2022-11-16 20:39:55,273 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:39:55,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:40:57,394 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 [2022-11-16 20:43:23,803 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2022-11-16 20:43:23,803 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:43:23,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189634452] [2022-11-16 20:43:23,803 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:43:23,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970668710] [2022-11-16 20:43:23,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970668710] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:43:23,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1519301496] [2022-11-16 20:43:23,805 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-16 20:43:23,805 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:43:23,806 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:43:23,806 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:43:23,806 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:43:23,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:43:23,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:43:23,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:43:23,920 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-16 20:43:23,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-16 20:43:23,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:43:23,939 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:43:23,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:43:23,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:43:23,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-16 20:43:23,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:43:23,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:43:23,999 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:43:24,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:43:24,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:43:24,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:43:24,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:43:24,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:43:24,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:43:24,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:43:24,202 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-16 20:43:24,203 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:43:24,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 20:43:24,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:43:24,358 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 20:43:24,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 20:43:24,430 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:43:24,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:43:24,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:43:24,495 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 20:43:24,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-11-16 20:43:24,586 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-16 20:43:24,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-16 20:43:24,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 20:43:24,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:43:24,654 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-16 20:43:24,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 20:43:24,725 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:43:24,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:43:24,748 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:43:30,378 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2558#(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 [2022-11-16 20:43:30,378 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:43:30,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:43:30,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2022-11-16 20:43:30,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819707212] [2022-11-16 20:43:30,379 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:43:30,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-16 20:43:30,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:43:30,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-16 20:43:30,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1976, Unknown=40, NotChecked=90, Total=2256 [2022-11-16 20:43:30,380 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 44 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:44:13,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-16 20:45:05,406 WARN L233 SmtUtils]: Spent 12.89s on a formula simplification. DAG size of input: 184 DAG size of output: 100 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 20:45:40,537 WARN L233 SmtUtils]: Spent 8.33s on a formula simplification. DAG size of input: 157 DAG size of output: 93 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 20:46:32,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:46:32,785 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2022-11-16 20:46:32,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-16 20:46:32,785 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-16 20:46:32,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:46:32,786 INFO L225 Difference]: With dead ends: 54 [2022-11-16 20:46:32,786 INFO L226 Difference]: Without dead ends: 45 [2022-11-16 20:46:32,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 370.6s TimeCoverageRelationStatistics Valid=206, Invalid=2599, Unknown=61, NotChecked=104, Total=2970 [2022-11-16 20:46:32,787 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 20.8s IncrementalHoareTripleChecker+Time [2022-11-16 20:46:32,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 58 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 654 Invalid, 0 Unknown, 164 Unchecked, 20.8s Time] [2022-11-16 20:46:32,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-16 20:46:32,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2022-11-16 20:46:32,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 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) [2022-11-16 20:46:32,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-11-16 20:46:32,810 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 24 [2022-11-16 20:46:32,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:46:32,810 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-11-16 20:46:32,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:46:32,811 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-11-16 20:46:32,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-16 20:46:32,811 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:46:32,812 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:46:32,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 20:46:33,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 20:46:33,012 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:46:33,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:46:33,013 INFO L85 PathProgramCache]: Analyzing trace with hash -470298031, now seen corresponding path program 11 times [2022-11-16 20:46:33,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:46:33,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885392627] [2022-11-16 20:46:33,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:46:33,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:46:33,038 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:46:33,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [177394269] [2022-11-16 20:46:33,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:46:33,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:46:33,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:46:33,040 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:46:33,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 20:46:33,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 20:46:33,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:46:33,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 20:46:33,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:46:33,544 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 20:46:33,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:46:33,660 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 20:46:33,661 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:46:33,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885392627] [2022-11-16 20:46:33,661 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:46:33,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177394269] [2022-11-16 20:46:33,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177394269] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:46:33,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [102175691] [2022-11-16 20:46:33,663 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-16 20:46:33,663 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:46:33,663 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:46:33,663 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:46:33,664 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:46:33,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:33,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:33,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:33,772 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-16 20:46:33,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-16 20:46:33,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:33,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:33,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-16 20:46:33,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:33,811 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:46:33,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:33,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:33,866 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:46:33,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:33,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:33,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:33,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:33,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:33,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:46:33,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:46:34,050 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-16 20:46:34,050 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:46:34,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 20:46:34,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:46:34,273 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 20:46:34,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 20:46:34,352 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:46:34,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:46:34,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:46:34,411 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 20:46:34,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 20:46:34,477 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-16 20:46:34,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-16 20:46:34,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 20:46:34,523 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-16 20:46:34,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 20:46:34,584 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:46:34,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:46:34,612 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:46:35,025 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2907#(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 [2022-11-16 20:46:35,025 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:46:35,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:46:35,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-11-16 20:46:35,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161842748] [2022-11-16 20:46:35,025 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:46:35,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 20:46:35,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:46:35,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 20:46:35,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-11-16 20:46:35,027 INFO L87 Difference]: Start difference. First operand 37 states and 43 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) [2022-11-16 20:46:35,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:46:35,427 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2022-11-16 20:46:35,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 20:46:35,428 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 [2022-11-16 20:46:35,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:46:35,428 INFO L225 Difference]: With dead ends: 61 [2022-11-16 20:46:35,429 INFO L226 Difference]: Without dead ends: 48 [2022-11-16 20:46:35,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2022-11-16 20:46:35,429 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 13 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:46:35,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 6 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 20:46:35,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-16 20:46:35,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 39. [2022-11-16 20:46:35,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 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) [2022-11-16 20:46:35,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-11-16 20:46:35,455 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 25 [2022-11-16 20:46:35,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:46:35,455 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-11-16 20:46:35,455 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) [2022-11-16 20:46:35,455 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-11-16 20:46:35,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-16 20:46:35,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:46:35,456 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:46:35,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 20:46:35,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 20:46:35,656 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:46:35,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:46:35,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1877163832, now seen corresponding path program 12 times [2022-11-16 20:46:35,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:46:35,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399213858] [2022-11-16 20:46:35,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:46:35,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:46:35,678 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:46:35,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [31663930] [2022-11-16 20:46:35,678 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 20:46:35,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:46:35,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:46:35,680 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:46:35,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 20:46:35,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 20:46:35,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:46:35,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 20:46:35,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:46:35,929 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 20:46:35,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:46:36,039 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 20:46:36,040 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:46:36,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399213858] [2022-11-16 20:46:36,040 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:46:36,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31663930] [2022-11-16 20:46:36,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31663930] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:46:36,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [86021015] [2022-11-16 20:46:36,042 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-16 20:46:36,042 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:46:36,042 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:46:36,042 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:46:36,042 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:46:36,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:36,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:36,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:36,145 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-16 20:46:36,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-16 20:46:36,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:36,160 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:46:36,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:36,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:36,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-16 20:46:36,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:36,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:36,216 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:46:36,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:36,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:36,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:36,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:36,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:36,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:46:36,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:36,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:36,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:36,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:36,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:36,401 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-16 20:46:36,401 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:46:36,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 20:46:36,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:46:36,515 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-16 20:46:36,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 20:46:36,588 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:46:36,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:46:36,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:46:36,654 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 20:46:36,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-11-16 20:46:36,729 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-16 20:46:36,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-16 20:46:36,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 20:46:36,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:46:36,801 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-16 20:46:36,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 20:46:36,893 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:46:36,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:46:36,916 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:46:37,833 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3274#(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 [2022-11-16 20:46:37,833 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:46:37,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:46:37,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-11-16 20:46:37,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858740072] [2022-11-16 20:46:37,834 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:46:37,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 20:46:37,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:46:37,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 20:46:37,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-11-16 20:46:37,835 INFO L87 Difference]: Start difference. First operand 39 states and 45 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) [2022-11-16 20:46:38,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:46:38,109 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2022-11-16 20:46:38,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 20:46:38,110 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 [2022-11-16 20:46:38,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:46:38,110 INFO L225 Difference]: With dead ends: 60 [2022-11-16 20:46:38,110 INFO L226 Difference]: Without dead ends: 29 [2022-11-16 20:46:38,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 22 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2022-11-16 20:46:38,112 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:46:38,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 10 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 20:46:38,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-16 20:46:38,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-16 20:46:38,136 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) [2022-11-16 20:46:38,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-11-16 20:46:38,136 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 25 [2022-11-16 20:46:38,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:46:38,137 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-11-16 20:46:38,137 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) [2022-11-16 20:46:38,137 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-11-16 20:46:38,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-16 20:46:38,138 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:46:38,138 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:46:38,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 20:46:38,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:46:38,342 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:46:38,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:46:38,342 INFO L85 PathProgramCache]: Analyzing trace with hash 616366677, now seen corresponding path program 13 times [2022-11-16 20:46:38,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:46:38,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420907300] [2022-11-16 20:46:38,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:46:38,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:46:38,365 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:46:38,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1255080680] [2022-11-16 20:46:38,365 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 20:46:38,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:46:38,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:46:38,367 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:46:38,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a30d54a-e475-42cd-afeb-2e5f2e2e0a3f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 20:46:38,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:46:38,543 WARN L261 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 143 conjunts are in the unsatisfiable core [2022-11-16 20:46:38,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:46:38,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 20:46:38,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:38,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-16 20:46:38,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:38,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-11-16 20:46:38,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:38,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 53 [2022-11-16 20:46:38,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:38,723 INFO L350 Elim1Store]: Elim1 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 60 treesize of output 68 [2022-11-16 20:46:38,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:38,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:38,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:38,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:38,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:38,813 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:46:38,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:38,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:38,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:46:38,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:38,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:38,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:38,997 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:46:39,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,097 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:46:39,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,195 INFO L350 Elim1Store]: Elim1 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 80 treesize of output 73 [2022-11-16 20:46:39,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:46:39,308 INFO L350 Elim1Store]: Elim1 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 98 treesize of output 79 [2022-11-16 20:46:39,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,415 INFO L350 Elim1Store]: Elim1 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 109 treesize of output 78 [2022-11-16 20:46:39,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,619 INFO L350 Elim1Store]: Elim1 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 93 treesize of output 76 [2022-11-16 20:46:39,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:46:39,726 INFO L350 Elim1Store]: Elim1 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 94 treesize of output 78 [2022-11-16 20:46:39,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,839 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:46:39,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:39,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:46:39,980 INFO L350 Elim1Store]: Elim1 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 90 treesize of output 76 [2022-11-16 20:46:40,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:40,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:40,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:40,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:40,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:40,099 INFO L350 Elim1Store]: Elim1 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 90 treesize of output 73 [2022-11-16 20:46:40,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:40,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:40,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:40,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:40,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:40,207 INFO L350 Elim1Store]: Elim1 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 71 [2022-11-16 20:46:40,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:40,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:40,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:40,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:40,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:40,341 INFO L350 Elim1Store]: Elim1 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 84 treesize of output 71 [2022-11-16 20:46:40,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:40,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:40,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:40,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:40,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:40,463 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:46:40,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:40,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:40,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:40,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:40,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:40,587 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:46:40,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:40,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:40,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:40,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:40,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:40,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:40,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:40,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:40,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:40,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:46:40,722 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:46:40,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:40,858 INFO L350 Elim1Store]: Elim1 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 70 treesize of output 65 [2022-11-16 20:46:40,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:46:40,997 INFO L350 Elim1Store]: Elim1 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 92 treesize of output 48 [2022-11-16 20:46:41,060 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:46:41,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:50:38,954 WARN L833 $PredicateComparison]: unable to prove that (forall ((~N~0 Int)) (or (< (+ 2 |c_ULTIMATE.start_main_~i~0#1|) ~N~0) (not (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) ~N~0)) (= (+ ~N~0 (* ~N~0 ~N~0)) (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 ((.cse4 (let ((.cse24 (let ((.cse25 (* 8 |c_ULTIMATE.start_main_~i~0#1|))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse25 |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (+ .cse25 8 |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|)) (.cse17 (select .cse24 |c_ULTIMATE.start_main_~a~0#1.offset|))) (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))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse9))) (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 .cse17 .cse19))) |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 .cse19))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse7))) (let ((.cse21 (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 .cse19 .cse20))) |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 .cse17 .cse18 .cse19 .cse20 (select .cse12 |c_ULTIMATE.start_main_~a~0#1.offset|) .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 .cse12 .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|)))))) (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 .cse12 .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|))))))))))))))))) (let ((.cse5 (select .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse0 (select (select (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse5 |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 ((.cse3 (select (select (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse0)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse9))) (let ((.cse1 (select (select (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse3))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse8))) (let ((.cse2 (select (select (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse1 .cse3))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse7))) (+ .cse0 .cse1 .cse2 .cse3 (select (select (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse1 .cse2 .cse3))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse6)))))))))))) is different from false [2022-11-16 20:50:41,965 WARN L833 $PredicateComparison]: unable to prove that (forall ((~N~0 Int)) (or (< (+ 3 |c_ULTIMATE.start_main_~i~0#1|) ~N~0) (= (+ ~N~0 (* ~N~0 ~N~0)) (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 ((.cse1 (let ((.cse24 (let ((.cse25 (* 8 |c_ULTIMATE.start_main_~i~0#1|))) (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse25 |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (+ .cse25 8 |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (+ .cse25 16 |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 ((.cse17 (select .cse23 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse18 (select .cse24 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse20 (select (select (store .cse22 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse23 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse17 .cse18))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse9))) (let ((.cse21 (select (select (store .cse22 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse23 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse17 .cse18 .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| (+ .cse17 .cse18 .cse20 .cse21))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse7))) (let ((.cse16 (select (select (store .cse22 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse23 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse17 .cse18 .cse19 .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 .cse17 .cse18 .cse19 .cse20 (select .cse12 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse21)))) (store .cse15 .cse9 (+ (select .cse12 .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|)))))) (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 ((.cse2 (select .cse1 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse0 (select (select (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse2 |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 ((.cse3 (select (select (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse2 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse0)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse9))) (let ((.cse4 (select (select (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse2 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse3))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse8))) (let ((.cse5 (select (select (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse2 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse3 .cse4))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse7))) (+ .cse0 (select (select (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse2 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse3 .cse4 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse6) .cse3 .cse4 .cse5))))))))) (not (< (+ 2 |c_ULTIMATE.start_main_~i~0#1|) ~N~0)))) is different from false