./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS --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 52a248b2b2cf395cf0c12ea6447af889ed3691d7fa3d2de2504a7728d19c705b --- 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-8393723 [2022-11-19 06:37:09,688 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:37:09,694 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:37:09,722 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:37:09,729 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:37:09,730 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:37:09,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:37:09,738 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:37:09,740 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:37:09,743 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:37:09,745 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:37:09,747 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:37:09,748 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:37:09,751 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:37:09,753 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:37:09,755 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:37:09,757 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:37:09,762 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:37:09,764 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:37:09,766 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:37:09,769 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:37:09,771 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:37:09,774 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:37:09,775 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:37:09,782 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:37:09,787 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:37:09,787 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:37:09,788 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:37:09,789 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:37:09,790 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:37:09,791 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:37:09,792 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:37:09,793 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:37:09,795 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:37:09,797 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:37:09,798 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:37:09,799 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:37:09,799 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:37:09,800 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:37:09,800 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:37:09,801 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:37:09,802 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 06:37:09,845 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:37:09,845 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:37:09,846 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:37:09,846 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:37:09,847 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:37:09,847 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:37:09,848 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:37:09,848 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:37:09,848 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:37:09,848 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:37:09,849 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:37:09,849 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:37:09,850 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:37:09,850 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:37:09,850 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:37:09,850 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:37:09,851 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:37:09,851 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:37:09,852 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:37:09,852 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 06:37:09,852 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:37:09,852 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 06:37:09,852 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:37:09,854 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 06:37:09,854 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:37:09,854 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 06:37:09,854 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 06:37:09,855 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 06:37:09,855 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:37:09,855 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 06:37:09,855 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:37:09,856 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:37:09,856 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:37:09,856 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:37:09,856 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:37:09,857 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:37:09,857 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 06:37:09,857 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:37:09,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:37:09,857 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 06:37:09,858 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:37:09,858 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_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52a248b2b2cf395cf0c12ea6447af889ed3691d7fa3d2de2504a7728d19c705b [2022-11-19 06:37:10,159 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:37:10,184 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:37:10,187 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:37:10,188 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:37:10,190 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:37:10,191 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c [2022-11-19 06:37:10,290 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/data/98df9c848/dd60577709a54e40873e3e8ad5009e95/FLAG9e8da74a2 [2022-11-19 06:37:10,731 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:37:10,732 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c [2022-11-19 06:37:10,738 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/data/98df9c848/dd60577709a54e40873e3e8ad5009e95/FLAG9e8da74a2 [2022-11-19 06:37:11,109 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/data/98df9c848/dd60577709a54e40873e3e8ad5009e95 [2022-11-19 06:37:11,114 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:37:11,118 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:37:11,122 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:37:11,122 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:37:11,125 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:37:11,126 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:37:11" (1/1) ... [2022-11-19 06:37:11,128 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ef32343 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:11, skipping insertion in model container [2022-11-19 06:37:11,129 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:37:11" (1/1) ... [2022-11-19 06:37:11,137 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:37:11,161 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:37:11,343 WARN L234 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_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c[414,427] [2022-11-19 06:37:11,368 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:37:11,376 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:37:11,390 WARN L234 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_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c[414,427] [2022-11-19 06:37:11,411 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:37:11,427 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:37:11,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:11 WrapperNode [2022-11-19 06:37:11,428 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:37:11,430 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:37:11,430 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:37:11,430 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:37:11,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:11" (1/1) ... [2022-11-19 06:37:11,456 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:11" (1/1) ... [2022-11-19 06:37:11,498 INFO L138 Inliner]: procedures = 15, calls = 22, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 132 [2022-11-19 06:37:11,500 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:37:11,501 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:37:11,502 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:37:11,502 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:37:11,511 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:11" (1/1) ... [2022-11-19 06:37:11,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:11" (1/1) ... [2022-11-19 06:37:11,525 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:11" (1/1) ... [2022-11-19 06:37:11,526 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:11" (1/1) ... [2022-11-19 06:37:11,537 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:11" (1/1) ... [2022-11-19 06:37:11,551 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:11" (1/1) ... [2022-11-19 06:37:11,552 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:11" (1/1) ... [2022-11-19 06:37:11,553 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:11" (1/1) ... [2022-11-19 06:37:11,556 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:37:11,556 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:37:11,557 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:37:11,557 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:37:11,558 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:11" (1/1) ... [2022-11-19 06:37:11,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:37:11,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:37:11,595 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:37:11,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:37:11,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:37:11,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 06:37:11,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 06:37:11,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 06:37:11,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:37:11,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:37:11,645 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 06:37:11,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 06:37:11,731 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:37:11,735 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:37:12,024 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:37:12,133 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:37:12,134 INFO L300 CfgBuilder]: Removed 12 assume(true) statements. [2022-11-19 06:37:12,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:37:12 BoogieIcfgContainer [2022-11-19 06:37:12,136 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:37:12,146 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:37:12,147 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:37:12,151 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:37:12,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:37:11" (1/3) ... [2022-11-19 06:37:12,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f097d0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:37:12, skipping insertion in model container [2022-11-19 06:37:12,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:11" (2/3) ... [2022-11-19 06:37:12,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f097d0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:37:12, skipping insertion in model container [2022-11-19 06:37:12,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:37:12" (3/3) ... [2022-11-19 06:37:12,156 INFO L112 eAbstractionObserver]: Analyzing ICFG copy-partial-3-u.c [2022-11-19 06:37:12,179 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:37:12,179 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 06:37:12,246 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:37:12,253 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;@30f28aa9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:37:12,254 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 06:37:12,258 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.875) internal successors, (30), 17 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) [2022-11-19 06:37:12,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 06:37:12,266 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:37:12,266 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:37:12,267 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:37:12,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:37:12,277 INFO L85 PathProgramCache]: Analyzing trace with hash 908962074, now seen corresponding path program 1 times [2022-11-19 06:37:12,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:37:12,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671417566] [2022-11-19 06:37:12,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:37:12,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:37:12,429 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:37:12,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [19826757] [2022-11-19 06:37:12,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:37:12,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:37:12,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:37:12,433 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:37:12,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 06:37:12,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:37:12,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 06:37:12,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:37:12,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:37:12,673 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:37:12,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:37:12,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671417566] [2022-11-19 06:37:12,691 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:37:12,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19826757] [2022-11-19 06:37:12,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19826757] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:37:12,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:37:12,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 06:37:12,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225247054] [2022-11-19 06:37:12,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:37:12,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:37:12,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:37:12,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:37:12,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:37:12,732 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.875) internal successors, (30), 17 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) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 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) [2022-11-19 06:37:12,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:37:12,811 INFO L93 Difference]: Finished difference Result 35 states and 59 transitions. [2022-11-19 06:37:12,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:37:12,814 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 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 [2022-11-19 06:37:12,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:37:12,822 INFO L225 Difference]: With dead ends: 35 [2022-11-19 06:37:12,822 INFO L226 Difference]: Without dead ends: 20 [2022-11-19 06:37:12,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:37:12,828 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 4 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:37:12,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 18 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:37:12,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-19 06:37:12,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2022-11-19 06:37:12,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:37:12,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 29 transitions. [2022-11-19 06:37:12,862 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 29 transitions. Word has length 9 [2022-11-19 06:37:12,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:37:12,862 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 29 transitions. [2022-11-19 06:37:12,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 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) [2022-11-19 06:37:12,863 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 29 transitions. [2022-11-19 06:37:12,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 06:37:12,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:37:12,864 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:37:12,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 06:37:13,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-19 06:37:13,070 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:37:13,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:37:13,071 INFO L85 PathProgramCache]: Analyzing trace with hash 648526984, now seen corresponding path program 1 times [2022-11-19 06:37:13,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:37:13,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253030156] [2022-11-19 06:37:13,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:37:13,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:37:13,086 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:37:13,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1078835270] [2022-11-19 06:37:13,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:37:13,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:37:13,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:37:13,088 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:37:13,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 06:37:13,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:37:13,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 06:37:13,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:37:13,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:37:13,217 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:37:13,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:37:13,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253030156] [2022-11-19 06:37:13,218 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:37:13,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078835270] [2022-11-19 06:37:13,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078835270] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:37:13,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:37:13,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:37:13,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844084291] [2022-11-19 06:37:13,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:37:13,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:37:13,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:37:13,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:37:13,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:37:13,221 INFO L87 Difference]: Start difference. First operand 18 states and 29 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:37:13,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:37:13,335 INFO L93 Difference]: Finished difference Result 47 states and 77 transitions. [2022-11-19 06:37:13,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:37:13,336 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-19 06:37:13,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:37:13,336 INFO L225 Difference]: With dead ends: 47 [2022-11-19 06:37:13,337 INFO L226 Difference]: Without dead ends: 31 [2022-11-19 06:37:13,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:37:13,341 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 59 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:37:13,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 9 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:37:13,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-19 06:37:13,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 20. [2022-11-19 06:37:13,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:37:13,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 31 transitions. [2022-11-19 06:37:13,363 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 31 transitions. Word has length 11 [2022-11-19 06:37:13,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:37:13,364 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 31 transitions. [2022-11-19 06:37:13,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:37:13,365 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 31 transitions. [2022-11-19 06:37:13,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 06:37:13,365 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:37:13,365 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:37:13,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 06:37:13,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:37:13,571 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:37:13,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:37:13,571 INFO L85 PathProgramCache]: Analyzing trace with hash -603899039, now seen corresponding path program 1 times [2022-11-19 06:37:13,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:37:13,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054977523] [2022-11-19 06:37:13,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:37:13,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:37:13,581 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:37:13,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [343610075] [2022-11-19 06:37:13,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:37:13,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:37:13,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:37:13,583 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:37:13,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 06:37:13,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:37:13,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 06:37:13,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:37:13,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:37:13,680 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:37:13,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:37:13,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054977523] [2022-11-19 06:37:13,680 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:37:13,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343610075] [2022-11-19 06:37:13,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343610075] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:37:13,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:37:13,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:37:13,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183422973] [2022-11-19 06:37:13,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:37:13,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:37:13,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:37:13,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:37:13,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:37:13,683 INFO L87 Difference]: Start difference. First operand 20 states and 31 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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) [2022-11-19 06:37:13,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:37:13,759 INFO L93 Difference]: Finished difference Result 50 states and 79 transitions. [2022-11-19 06:37:13,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:37:13,760 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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) Word has length 13 [2022-11-19 06:37:13,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:37:13,761 INFO L225 Difference]: With dead ends: 50 [2022-11-19 06:37:13,761 INFO L226 Difference]: Without dead ends: 32 [2022-11-19 06:37:13,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:37:13,762 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 54 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:37:13,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 8 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:37:13,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-19 06:37:13,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 22. [2022-11-19 06:37:13,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:37:13,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 33 transitions. [2022-11-19 06:37:13,770 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 33 transitions. Word has length 13 [2022-11-19 06:37:13,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:37:13,770 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 33 transitions. [2022-11-19 06:37:13,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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) [2022-11-19 06:37:13,771 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 33 transitions. [2022-11-19 06:37:13,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 06:37:13,771 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:37:13,771 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:37:13,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 06:37:13,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:37:13,978 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:37:13,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:37:13,978 INFO L85 PathProgramCache]: Analyzing trace with hash -972286329, now seen corresponding path program 1 times [2022-11-19 06:37:13,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:37:13,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118439475] [2022-11-19 06:37:13,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:37:13,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:37:13,988 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:37:13,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [341222068] [2022-11-19 06:37:13,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:37:13,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:37:13,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:37:13,990 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:37:13,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 06:37:14,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:37:14,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 06:37:14,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:37:14,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:37:14,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:37:14,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:37:14,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:37:14,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118439475] [2022-11-19 06:37:14,159 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:37:14,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341222068] [2022-11-19 06:37:14,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341222068] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:37:14,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1883456676] [2022-11-19 06:37:14,180 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-19 06:37:14,181 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:37:14,184 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:37:14,191 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:37:14,192 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:37:14,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:14,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:14,397 INFO L321 Elim1Store]: treesize reduction 95, result has 28.0 percent of original size [2022-11-19 06:37:14,400 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 39 treesize of output 63 [2022-11-19 06:37:14,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:14,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:14,552 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 06:37:14,554 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 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 06:37:14,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:14,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2022-11-19 06:37:15,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:15,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:15,529 INFO L321 Elim1Store]: treesize reduction 89, result has 27.6 percent of original size [2022-11-19 06:37:15,530 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 4 case distinctions, treesize of input 410 treesize of output 396 [2022-11-19 06:37:15,967 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 28 treesize of output 24 [2022-11-19 06:37:16,206 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 28 treesize of output 24 [2022-11-19 06:37:16,384 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 28 treesize of output 24 [2022-11-19 06:37:16,623 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:37:17,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1883456676] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:37:17,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:37:17,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 4] total 11 [2022-11-19 06:37:17,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189461133] [2022-11-19 06:37:17,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:37:17,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 06:37:17,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:37:17,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 06:37:17,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-11-19 06:37:17,165 INFO L87 Difference]: Start difference. First operand 22 states and 33 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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) [2022-11-19 06:37:17,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:37:17,507 INFO L93 Difference]: Finished difference Result 50 states and 73 transitions. [2022-11-19 06:37:17,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:37:17,507 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2022-11-19 06:37:17,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:37:17,509 INFO L225 Difference]: With dead ends: 50 [2022-11-19 06:37:17,509 INFO L226 Difference]: Without dead ends: 35 [2022-11-19 06:37:17,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-11-19 06:37:17,511 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:37:17,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 6 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:37:17,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-19 06:37:17,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2022-11-19 06:37:17,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 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) [2022-11-19 06:37:17,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 36 transitions. [2022-11-19 06:37:17,526 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 36 transitions. Word has length 14 [2022-11-19 06:37:17,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:37:17,526 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 36 transitions. [2022-11-19 06:37:17,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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) [2022-11-19 06:37:17,527 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 36 transitions. [2022-11-19 06:37:17,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-19 06:37:17,527 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:37:17,528 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:37:17,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 06:37:17,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:37:17,734 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:37:17,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:37:17,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1749873230, now seen corresponding path program 1 times [2022-11-19 06:37:17,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:37:17,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283002873] [2022-11-19 06:37:17,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:37:17,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:37:17,747 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:37:17,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1605262481] [2022-11-19 06:37:17,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:37:17,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:37:17,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:37:17,754 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:37:17,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 06:37:17,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:37:17,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 06:37:17,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:37:17,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 06:37:17,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:37:17,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 06:37:17,877 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:37:17,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283002873] [2022-11-19 06:37:17,878 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:37:17,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605262481] [2022-11-19 06:37:17,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605262481] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:37:17,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [52850504] [2022-11-19 06:37:17,881 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-19 06:37:17,881 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:37:17,881 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:37:17,882 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:37:17,882 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:37:17,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:17,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:17,975 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 06:37:17,976 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 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 06:37:17,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:17,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:17,997 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 39 treesize of output 49 [2022-11-19 06:37:18,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:18,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2022-11-19 06:37:18,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:18,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:18,405 INFO L321 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-11-19 06:37:18,406 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 3 case distinctions, treesize of input 418 treesize of output 394 [2022-11-19 06:37:18,569 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 28 treesize of output 24 [2022-11-19 06:37:18,636 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 28 treesize of output 24 [2022-11-19 06:37:18,776 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 24 treesize of output 20 [2022-11-19 06:37:18,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-19 06:37:18,933 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 28 treesize of output 24 [2022-11-19 06:37:19,014 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 28 treesize of output 24 [2022-11-19 06:37:19,147 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 142 treesize of output 120 [2022-11-19 06:37:19,208 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 28 treesize of output 24 [2022-11-19 06:37:19,270 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 28 treesize of output 24 [2022-11-19 06:37:19,342 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 28 treesize of output 24 [2022-11-19 06:37:19,433 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 142 treesize of output 120 [2022-11-19 06:37:19,510 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 28 treesize of output 24 [2022-11-19 06:37:19,571 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 28 treesize of output 24 [2022-11-19 06:37:19,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:19,648 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:37:19,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:37:19,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:19,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:19,765 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-19 06:37:19,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 175 [2022-11-19 06:37:19,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:19,834 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:19,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:19,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:19,935 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:37:19,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:37:19,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:19,990 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:19,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:20,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:20,103 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:20,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:20,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:20,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:20,176 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-19 06:37:20,177 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 3 case distinctions, treesize of input 152 treesize of output 157 [2022-11-19 06:37:20,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:20,231 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:20,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:20,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:20,294 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:20,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:20,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:20,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:20,354 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-19 06:37:20,354 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 3 case distinctions, treesize of input 146 treesize of output 151 [2022-11-19 06:37:20,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:20,405 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:20,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:20,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:20,551 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:37:20,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:37:20,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:20,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:20,650 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-11-19 06:37:20,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 167 [2022-11-19 06:37:20,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:20,730 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:20,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:20,738 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:37:21,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [52850504] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:37:21,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:37:21,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 4] total 12 [2022-11-19 06:37:21,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925168352] [2022-11-19 06:37:21,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:37:21,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 06:37:21,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:37:21,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 06:37:21,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-11-19 06:37:21,326 INFO L87 Difference]: Start difference. First operand 25 states and 36 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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) [2022-11-19 06:37:22,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:37:22,365 INFO L93 Difference]: Finished difference Result 57 states and 86 transitions. [2022-11-19 06:37:22,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 06:37:22,366 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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 19 [2022-11-19 06:37:22,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:37:22,368 INFO L225 Difference]: With dead ends: 57 [2022-11-19 06:37:22,368 INFO L226 Difference]: Without dead ends: 45 [2022-11-19 06:37:22,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-11-19 06:37:22,369 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 20 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:37:22,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 9 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:37:22,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-19 06:37:22,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 27. [2022-11-19 06:37:22,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2022-11-19 06:37:22,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 38 transitions. [2022-11-19 06:37:22,392 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 38 transitions. Word has length 19 [2022-11-19 06:37:22,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:37:22,392 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 38 transitions. [2022-11-19 06:37:22,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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) [2022-11-19 06:37:22,393 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 38 transitions. [2022-11-19 06:37:22,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-19 06:37:22,394 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:37:22,394 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:37:22,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-19 06:37:22,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:37:22,600 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:37:22,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:37:22,601 INFO L85 PathProgramCache]: Analyzing trace with hash -494766001, now seen corresponding path program 1 times [2022-11-19 06:37:22,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:37:22,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882291172] [2022-11-19 06:37:22,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:37:22,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:37:22,614 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:37:22,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [426887455] [2022-11-19 06:37:22,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:37:22,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:37:22,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:37:22,616 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:37:22,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 06:37:22,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:37:22,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 06:37:22,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:37:22,735 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 06:37:22,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:37:22,763 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 06:37:22,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:37:22,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882291172] [2022-11-19 06:37:22,763 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:37:22,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426887455] [2022-11-19 06:37:22,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426887455] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:37:22,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [213508340] [2022-11-19 06:37:22,766 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-19 06:37:22,766 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:37:22,767 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:37:22,767 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:37:22,767 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:37:22,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:22,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:22,851 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 06:37:22,852 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 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 06:37:22,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:22,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:22,872 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 39 treesize of output 49 [2022-11-19 06:37:22,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:22,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2022-11-19 06:37:23,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:23,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:23,240 INFO L321 Elim1Store]: treesize reduction 89, result has 27.6 percent of original size [2022-11-19 06:37:23,240 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 4 case distinctions, treesize of input 410 treesize of output 396 [2022-11-19 06:37:23,449 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 28 treesize of output 24 [2022-11-19 06:37:23,517 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 28 treesize of output 24 [2022-11-19 06:37:23,658 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 24 treesize of output 20 [2022-11-19 06:37:23,788 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 28 treesize of output 24 [2022-11-19 06:37:23,874 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 28 treesize of output 24 [2022-11-19 06:37:23,956 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 28 treesize of output 24 [2022-11-19 06:37:24,049 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 142 treesize of output 120 [2022-11-19 06:37:24,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-19 06:37:24,176 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 28 treesize of output 24 [2022-11-19 06:37:24,251 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 24 treesize of output 20 [2022-11-19 06:37:24,347 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-11-19 06:37:24,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 122 [2022-11-19 06:37:24,448 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 28 treesize of output 24 [2022-11-19 06:37:24,499 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 28 treesize of output 24 [2022-11-19 06:37:24,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:24,563 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:37:24,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:37:24,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:24,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:24,659 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-11-19 06:37:24,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 185 [2022-11-19 06:37:24,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:24,745 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:24,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:24,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:24,823 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:37:24,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:37:24,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:24,886 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:24,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:24,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:24,966 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:37:24,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:37:25,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:25,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:25,060 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-19 06:37:25,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 144 treesize of output 163 [2022-11-19 06:37:25,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:25,130 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:25,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:25,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:25,185 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:25,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:25,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:25,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:25,237 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-19 06:37:25,237 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 3 case distinctions, treesize of input 146 treesize of output 151 [2022-11-19 06:37:25,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:25,286 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:25,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:25,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:25,466 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:37:25,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:37:25,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:25,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:25,591 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-11-19 06:37:25,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 167 [2022-11-19 06:37:25,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:25,672 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:25,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:25,676 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:37:26,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [213508340] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:37:26,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:37:26,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4, 4] total 14 [2022-11-19 06:37:26,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490976530] [2022-11-19 06:37:26,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:37:26,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 06:37:26,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:37:26,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 06:37:26,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2022-11-19 06:37:26,496 INFO L87 Difference]: Start difference. First operand 27 states and 38 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 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) [2022-11-19 06:37:27,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:37:27,451 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2022-11-19 06:37:27,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 06:37:27,452 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-19 06:37:27,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:37:27,453 INFO L225 Difference]: With dead ends: 59 [2022-11-19 06:37:27,453 INFO L226 Difference]: Without dead ends: 46 [2022-11-19 06:37:27,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2022-11-19 06:37:27,460 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:37:27,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 12 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:37:27,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-19 06:37:27,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 29. [2022-11-19 06:37:27,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:37:27,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2022-11-19 06:37:27,479 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 23 [2022-11-19 06:37:27,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:37:27,479 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2022-11-19 06:37:27,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 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) [2022-11-19 06:37:27,480 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2022-11-19 06:37:27,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 06:37:27,480 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:37:27,480 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:37:27,485 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-19 06:37:27,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-19 06:37:27,681 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:37:27,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:37:27,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1997306399, now seen corresponding path program 1 times [2022-11-19 06:37:27,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:37:27,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340208146] [2022-11-19 06:37:27,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:37:27,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:37:27,690 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:37:27,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [459059270] [2022-11-19 06:37:27,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:37:27,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:37:27,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:37:27,692 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:37:27,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 06:37:27,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:37:27,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 06:37:27,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:37:27,794 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 06:37:27,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:37:27,817 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 06:37:27,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:37:27,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340208146] [2022-11-19 06:37:27,817 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:37:27,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459059270] [2022-11-19 06:37:27,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459059270] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:37:27,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [131841678] [2022-11-19 06:37:27,820 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-19 06:37:27,820 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:37:27,821 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:37:27,821 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:37:27,821 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:37:27,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:27,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:27,916 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 06:37:27,916 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 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 06:37:27,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:27,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:27,939 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 39 treesize of output 49 [2022-11-19 06:37:28,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:28,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2022-11-19 06:37:28,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:28,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:28,320 INFO L321 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-11-19 06:37:28,320 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 3 case distinctions, treesize of input 418 treesize of output 394 [2022-11-19 06:37:28,446 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 28 treesize of output 24 [2022-11-19 06:37:28,500 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 28 treesize of output 24 [2022-11-19 06:37:28,645 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 28 treesize of output 24 [2022-11-19 06:37:28,696 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 28 treesize of output 24 [2022-11-19 06:37:28,736 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 28 treesize of output 24 [2022-11-19 06:37:28,795 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 24 treesize of output 20 [2022-11-19 06:37:28,890 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-11-19 06:37:28,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 122 [2022-11-19 06:37:28,988 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 28 treesize of output 24 [2022-11-19 06:37:29,041 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 28 treesize of output 24 [2022-11-19 06:37:29,100 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 28 treesize of output 24 [2022-11-19 06:37:29,178 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 142 treesize of output 120 [2022-11-19 06:37:29,246 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 28 treesize of output 24 [2022-11-19 06:37:29,298 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 28 treesize of output 24 [2022-11-19 06:37:29,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:29,364 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:29,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:29,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:29,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:29,422 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-19 06:37:29,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2022-11-19 06:37:29,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:29,471 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:29,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:29,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:29,544 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:29,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:29,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:29,597 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:29,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:29,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:29,643 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:29,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:29,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:29,729 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:29,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:29,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:29,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:29,777 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-19 06:37:29,778 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 3 case distinctions, treesize of input 152 treesize of output 157 [2022-11-19 06:37:29,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:29,823 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:29,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:29,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:29,873 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:37:29,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:37:29,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:29,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:29,983 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-11-19 06:37:29,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 167 [2022-11-19 06:37:30,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:30,059 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:30,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:30,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:30,174 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:30,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:30,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:30,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:30,279 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-19 06:37:30,279 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 3 case distinctions, treesize of input 174 treesize of output 179 [2022-11-19 06:37:30,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:30,349 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:30,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:30,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:30,397 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:30,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:30,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:30,478 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-19 06:37:30,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-11-19 06:37:30,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:30,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:30,619 INFO L321 Elim1Store]: treesize reduction 147, result has 41.0 percent of original size [2022-11-19 06:37:30,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 205 [2022-11-19 06:37:30,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:30,761 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:30,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:30,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:30,818 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:30,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:30,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:30,913 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-19 06:37:30,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-11-19 06:37:31,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:31,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:31,080 INFO L321 Elim1Store]: treesize reduction 160, result has 35.7 percent of original size [2022-11-19 06:37:31,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 192 [2022-11-19 06:37:31,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:31,173 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:31,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:31,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:31,217 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:31,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:31,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:31,281 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:37:31,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:37:31,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:31,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:31,404 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-11-19 06:37:31,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 167 [2022-11-19 06:37:31,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:31,475 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:31,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:31,481 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:37:32,598 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1441#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-19 06:37:32,598 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:37:32,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:37:32,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-19 06:37:32,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465262404] [2022-11-19 06:37:32,599 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:37:32,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 06:37:32,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:37:32,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 06:37:32,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2022-11-19 06:37:32,600 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:37:32,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:37:32,801 INFO L93 Difference]: Finished difference Result 95 states and 135 transitions. [2022-11-19 06:37:32,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 06:37:32,801 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-19 06:37:32,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:37:32,804 INFO L225 Difference]: With dead ends: 95 [2022-11-19 06:37:32,804 INFO L226 Difference]: Without dead ends: 68 [2022-11-19 06:37:32,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2022-11-19 06:37:32,809 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 136 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:37:32,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 14 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:37:32,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-19 06:37:32,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 41. [2022-11-19 06:37:32,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.375) internal successors, (55), 40 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:37:32,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 55 transitions. [2022-11-19 06:37:32,844 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 55 transitions. Word has length 24 [2022-11-19 06:37:32,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:37:32,844 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 55 transitions. [2022-11-19 06:37:32,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:37:32,845 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 55 transitions. [2022-11-19 06:37:32,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-19 06:37:32,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:37:32,846 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:37:32,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-19 06:37:33,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:37:33,052 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:37:33,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:37:33,052 INFO L85 PathProgramCache]: Analyzing trace with hash 321559483, now seen corresponding path program 2 times [2022-11-19 06:37:33,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:37:33,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51676474] [2022-11-19 06:37:33,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:37:33,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:37:33,062 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:37:33,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2038672344] [2022-11-19 06:37:33,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:37:33,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:37:33,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:37:33,064 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:37:33,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 06:37:33,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 06:37:33,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:37:33,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 06:37:33,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:37:33,228 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-19 06:37:33,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:37:33,278 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-19 06:37:33,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:37:33,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51676474] [2022-11-19 06:37:33,279 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:37:33,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038672344] [2022-11-19 06:37:33,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038672344] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:37:33,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1115474882] [2022-11-19 06:37:33,282 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-19 06:37:33,283 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:37:33,283 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:37:33,283 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:37:33,283 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:37:33,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:33,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:33,372 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 06:37:33,373 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 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 06:37:33,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:33,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:33,390 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 39 treesize of output 49 [2022-11-19 06:37:33,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:33,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2022-11-19 06:37:33,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:33,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:33,703 INFO L321 Elim1Store]: treesize reduction 89, result has 27.6 percent of original size [2022-11-19 06:37:33,704 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 4 case distinctions, treesize of input 410 treesize of output 396 [2022-11-19 06:37:33,899 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 28 treesize of output 24 [2022-11-19 06:37:33,964 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 28 treesize of output 24 [2022-11-19 06:37:34,072 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 28 treesize of output 24 [2022-11-19 06:37:34,120 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 28 treesize of output 24 [2022-11-19 06:37:34,156 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 28 treesize of output 24 [2022-11-19 06:37:34,213 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 24 treesize of output 20 [2022-11-19 06:37:34,310 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-11-19 06:37:34,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 122 [2022-11-19 06:37:34,410 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 28 treesize of output 24 [2022-11-19 06:37:34,465 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 28 treesize of output 24 [2022-11-19 06:37:34,524 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 24 treesize of output 20 [2022-11-19 06:37:34,636 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-11-19 06:37:34,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 122 [2022-11-19 06:37:34,730 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 28 treesize of output 24 [2022-11-19 06:37:34,780 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 28 treesize of output 24 [2022-11-19 06:37:34,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:34,843 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:34,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:34,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:34,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:34,892 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-19 06:37:34,893 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 3 case distinctions, treesize of input 164 treesize of output 169 [2022-11-19 06:37:34,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:34,940 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:34,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:35,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:35,017 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:37:35,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:37:35,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:35,056 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:35,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:35,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:35,130 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:35,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:35,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:35,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:35,178 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-19 06:37:35,178 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 3 case distinctions, treesize of input 152 treesize of output 157 [2022-11-19 06:37:35,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:35,221 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:35,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:35,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:35,271 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:35,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:35,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:35,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:35,317 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-19 06:37:35,318 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 3 case distinctions, treesize of input 146 treesize of output 151 [2022-11-19 06:37:35,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:35,359 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:35,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:35,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:35,486 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-19 06:37:35,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-11-19 06:37:35,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:35,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:35,620 INFO L321 Elim1Store]: treesize reduction 160, result has 35.7 percent of original size [2022-11-19 06:37:35,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 198 [2022-11-19 06:37:35,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:35,698 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:35,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:35,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:35,745 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:35,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:35,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:35,833 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-19 06:37:35,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-11-19 06:37:35,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:35,877 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:35,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:35,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:35,923 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:35,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:35,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:36,003 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-19 06:37:36,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-11-19 06:37:36,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:36,050 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:36,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:36,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:36,099 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:36,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:36,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:36,162 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:36,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:36,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:36,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:36,210 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-19 06:37:36,211 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 3 case distinctions, treesize of input 146 treesize of output 151 [2022-11-19 06:37:36,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:36,256 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:36,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:36,261 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:37:37,476 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1868#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-19 06:37:37,476 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:37:37,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:37:37,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-19 06:37:37,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425504157] [2022-11-19 06:37:37,477 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:37:37,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 06:37:37,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:37:37,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 06:37:37,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2022-11-19 06:37:37,478 INFO L87 Difference]: Start difference. First operand 41 states and 55 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 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) [2022-11-19 06:37:37,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:37:37,690 INFO L93 Difference]: Finished difference Result 162 states and 220 transitions. [2022-11-19 06:37:37,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 06:37:37,691 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 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) Word has length 27 [2022-11-19 06:37:37,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:37:37,693 INFO L225 Difference]: With dead ends: 162 [2022-11-19 06:37:37,693 INFO L226 Difference]: Without dead ends: 131 [2022-11-19 06:37:37,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2022-11-19 06:37:37,695 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 145 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:37:37,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 16 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:37:37,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-19 06:37:37,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 76. [2022-11-19 06:37:37,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.36) internal successors, (102), 75 states have internal predecessors, (102), 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) [2022-11-19 06:37:37,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 102 transitions. [2022-11-19 06:37:37,740 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 102 transitions. Word has length 27 [2022-11-19 06:37:37,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:37:37,740 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 102 transitions. [2022-11-19 06:37:37,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 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) [2022-11-19 06:37:37,740 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 102 transitions. [2022-11-19 06:37:37,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-19 06:37:37,742 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:37:37,742 INFO L195 NwaCegarLoop]: trace histogram [16, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:37:37,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 06:37:37,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:37:37,948 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:37:37,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:37:37,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1772377171, now seen corresponding path program 3 times [2022-11-19 06:37:37,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:37:37,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876482615] [2022-11-19 06:37:37,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:37:37,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:37:37,962 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:37:37,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1639587323] [2022-11-19 06:37:37,963 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:37:37,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:37:37,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:37:37,964 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:37:37,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 06:37:38,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 06:37:38,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:37:38,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 06:37:38,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:37:38,176 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 8 proven. 89 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-11-19 06:37:38,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:37:38,261 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 8 proven. 89 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-11-19 06:37:38,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:37:38,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876482615] [2022-11-19 06:37:38,262 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:37:38,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639587323] [2022-11-19 06:37:38,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639587323] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:37:38,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1395177514] [2022-11-19 06:37:38,264 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-19 06:37:38,264 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:37:38,265 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:37:38,265 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:37:38,265 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:37:38,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:38,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:38,357 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 06:37:38,358 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 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 06:37:38,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:38,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:38,375 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 39 treesize of output 49 [2022-11-19 06:37:38,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:38,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2022-11-19 06:37:38,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:38,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:38,719 INFO L321 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-11-19 06:37:38,719 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 3 case distinctions, treesize of input 418 treesize of output 394 [2022-11-19 06:37:38,825 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 28 treesize of output 24 [2022-11-19 06:37:38,876 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 28 treesize of output 24 [2022-11-19 06:37:38,980 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 24 treesize of output 20 [2022-11-19 06:37:39,061 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 28 treesize of output 24 [2022-11-19 06:37:39,113 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 28 treesize of output 24 [2022-11-19 06:37:39,180 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 28 treesize of output 24 [2022-11-19 06:37:39,255 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 142 treesize of output 120 [2022-11-19 06:37:39,322 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 28 treesize of output 24 [2022-11-19 06:37:39,365 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 28 treesize of output 24 [2022-11-19 06:37:39,422 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 24 treesize of output 20 [2022-11-19 06:37:39,502 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-11-19 06:37:39,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 122 [2022-11-19 06:37:39,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-19 06:37:39,638 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 28 treesize of output 24 [2022-11-19 06:37:39,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:39,698 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:37:39,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:37:39,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:39,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:39,782 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-11-19 06:37:39,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 185 [2022-11-19 06:37:39,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:39,877 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:39,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:39,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:39,949 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:37:39,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:37:39,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:39,988 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:39,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:40,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:40,053 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:37:40,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:37:40,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:40,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:40,152 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-11-19 06:37:40,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 144 treesize of output 173 [2022-11-19 06:37:40,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:40,272 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:40,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:40,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:40,324 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:40,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:40,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:40,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:40,370 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-19 06:37:40,371 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 3 case distinctions, treesize of input 146 treesize of output 151 [2022-11-19 06:37:40,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:40,415 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:40,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:40,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:40,523 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:40,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:40,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:40,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:40,620 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-19 06:37:40,621 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 3 case distinctions, treesize of input 174 treesize of output 179 [2022-11-19 06:37:40,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:40,691 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:40,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:40,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:40,736 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:40,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:40,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:40,811 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:40,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:40,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:40,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:40,906 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-19 06:37:40,907 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 3 case distinctions, treesize of input 168 treesize of output 173 [2022-11-19 06:37:40,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:40,968 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:40,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:41,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:41,023 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:41,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:41,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:41,100 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:41,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:41,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:41,143 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:41,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:41,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:41,186 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:41,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:41,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:41,253 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:37:41,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:37:41,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:41,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:41,348 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-11-19 06:37:41,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 167 [2022-11-19 06:37:41,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:41,406 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:41,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:41,415 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:37:43,023 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2707#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-19 06:37:43,024 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:37:43,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:37:43,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-11-19 06:37:43,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399855772] [2022-11-19 06:37:43,025 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:37:43,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-19 06:37:43,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:37:43,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-19 06:37:43,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-11-19 06:37:43,026 INFO L87 Difference]: Start difference. First operand 76 states and 102 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2022-11-19 06:37:43,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:37:43,411 INFO L93 Difference]: Finished difference Result 260 states and 355 transitions. [2022-11-19 06:37:43,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 06:37:43,411 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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 63 [2022-11-19 06:37:43,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:37:43,413 INFO L225 Difference]: With dead ends: 260 [2022-11-19 06:37:43,413 INFO L226 Difference]: Without dead ends: 178 [2022-11-19 06:37:43,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 143 SyntacticMatches, 25 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2022-11-19 06:37:43,415 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 104 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:37:43,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 51 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:37:43,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-11-19 06:37:43,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 100. [2022-11-19 06:37:43,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.3131313131313131) internal successors, (130), 99 states have internal predecessors, (130), 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) [2022-11-19 06:37:43,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 130 transitions. [2022-11-19 06:37:43,453 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 130 transitions. Word has length 63 [2022-11-19 06:37:43,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:37:43,453 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 130 transitions. [2022-11-19 06:37:43,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2022-11-19 06:37:43,453 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 130 transitions. [2022-11-19 06:37:43,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-19 06:37:43,455 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:37:43,455 INFO L195 NwaCegarLoop]: trace histogram [32, 8, 8, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:37:43,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 06:37:43,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:37:43,658 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:37:43,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:37:43,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1481494967, now seen corresponding path program 4 times [2022-11-19 06:37:43,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:37:43,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924599452] [2022-11-19 06:37:43,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:37:43,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:37:43,681 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:37:43,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1459487311] [2022-11-19 06:37:43,681 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 06:37:43,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:37:43,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:37:43,682 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:37:43,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 06:37:43,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:37:43,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 06:37:43,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:37:43,902 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 190 proven. 10 refuted. 0 times theorem prover too weak. 707 trivial. 0 not checked. [2022-11-19 06:37:43,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:37:43,957 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 190 proven. 10 refuted. 0 times theorem prover too weak. 707 trivial. 0 not checked. [2022-11-19 06:37:43,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:37:43,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924599452] [2022-11-19 06:37:43,958 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:37:43,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459487311] [2022-11-19 06:37:43,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459487311] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:37:43,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1411378586] [2022-11-19 06:37:43,960 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-19 06:37:43,960 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:37:43,960 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:37:43,961 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:37:43,961 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:37:43,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:43,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:44,048 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 06:37:44,048 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 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 06:37:44,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:44,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:44,066 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 39 treesize of output 49 [2022-11-19 06:37:44,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:44,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2022-11-19 06:37:44,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:44,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:44,384 INFO L321 Elim1Store]: treesize reduction 89, result has 27.6 percent of original size [2022-11-19 06:37:44,385 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 4 case distinctions, treesize of input 410 treesize of output 396 [2022-11-19 06:37:44,576 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 28 treesize of output 24 [2022-11-19 06:37:44,634 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 28 treesize of output 24 [2022-11-19 06:37:44,723 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 28 treesize of output 24 [2022-11-19 06:37:44,768 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 28 treesize of output 24 [2022-11-19 06:37:44,801 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 28 treesize of output 24 [2022-11-19 06:37:44,852 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 24 treesize of output 20 [2022-11-19 06:37:44,938 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-11-19 06:37:44,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 122 [2022-11-19 06:37:45,033 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 28 treesize of output 24 [2022-11-19 06:37:45,073 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 28 treesize of output 24 [2022-11-19 06:37:45,120 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 28 treesize of output 24 [2022-11-19 06:37:45,184 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 142 treesize of output 120 [2022-11-19 06:37:45,231 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 28 treesize of output 24 [2022-11-19 06:37:45,277 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 28 treesize of output 24 [2022-11-19 06:37:45,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:45,341 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:37:45,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:37:45,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:45,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:45,428 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-11-19 06:37:45,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 185 [2022-11-19 06:37:45,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:45,519 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:45,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:45,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:45,600 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:45,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:45,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:45,647 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:45,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:45,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:45,688 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:45,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:45,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:45,783 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:45,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:45,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:45,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:45,823 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-19 06:37:45,823 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 3 case distinctions, treesize of input 152 treesize of output 157 [2022-11-19 06:37:45,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:45,871 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:45,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:45,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:45,917 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:45,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:45,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:45,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:45,958 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-19 06:37:45,958 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 3 case distinctions, treesize of input 146 treesize of output 151 [2022-11-19 06:37:45,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:45,996 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:45,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:46,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:46,094 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-19 06:37:46,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-11-19 06:37:46,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:46,137 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:46,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:46,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:46,183 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:46,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:46,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:46,263 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-19 06:37:46,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-11-19 06:37:46,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:46,309 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:46,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:46,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:46,355 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:46,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:46,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:46,415 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:46,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:46,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:46,457 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:46,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:46,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:46,501 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:46,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:46,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:46,569 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:37:46,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:37:46,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:46,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:46,669 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-11-19 06:37:46,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 167 [2022-11-19 06:37:46,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:46,746 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:46,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:46,750 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:37:48,551 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3947#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-19 06:37:48,552 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:37:48,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:37:48,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-19 06:37:48,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112598568] [2022-11-19 06:37:48,552 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:37:48,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 06:37:48,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:37:48,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 06:37:48,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=373, Unknown=0, NotChecked=0, Total=552 [2022-11-19 06:37:48,554 INFO L87 Difference]: Start difference. First operand 100 states and 130 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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) [2022-11-19 06:37:49,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:37:49,003 INFO L93 Difference]: Finished difference Result 327 states and 467 transitions. [2022-11-19 06:37:49,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 06:37:49,003 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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) Word has length 87 [2022-11-19 06:37:49,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:37:49,005 INFO L225 Difference]: With dead ends: 327 [2022-11-19 06:37:49,005 INFO L226 Difference]: Without dead ends: 235 [2022-11-19 06:37:49,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 195 SyntacticMatches, 42 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2022-11-19 06:37:49,006 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 214 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:37:49,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 32 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:37:49,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-11-19 06:37:49,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 166. [2022-11-19 06:37:49,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.2242424242424241) internal successors, (202), 165 states have internal predecessors, (202), 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) [2022-11-19 06:37:49,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 202 transitions. [2022-11-19 06:37:49,086 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 202 transitions. Word has length 87 [2022-11-19 06:37:49,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:37:49,086 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 202 transitions. [2022-11-19 06:37:49,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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) [2022-11-19 06:37:49,086 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 202 transitions. [2022-11-19 06:37:49,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-19 06:37:49,088 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:37:49,089 INFO L195 NwaCegarLoop]: trace histogram [80, 8, 8, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:37:49,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 06:37:49,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 06:37:49,291 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:37:49,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:37:49,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1651562313, now seen corresponding path program 5 times [2022-11-19 06:37:49,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:37:49,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731461459] [2022-11-19 06:37:49,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:37:49,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:37:49,326 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:37:49,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [675233234] [2022-11-19 06:37:49,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:37:49,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:37:49,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:37:49,328 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:37:49,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 06:37:49,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 06:37:49,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:37:49,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 06:37:49,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:37:49,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3955 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3954 trivial. 0 not checked. [2022-11-19 06:37:49,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:37:49,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3955 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3954 trivial. 0 not checked. [2022-11-19 06:37:49,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:37:49,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731461459] [2022-11-19 06:37:49,821 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:37:49,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675233234] [2022-11-19 06:37:49,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675233234] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:37:49,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1594857800] [2022-11-19 06:37:49,823 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-19 06:37:49,823 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:37:49,824 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:37:49,824 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:37:49,824 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:37:49,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:49,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:49,903 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 06:37:49,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 06:37:49,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:49,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:49,923 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 39 treesize of output 49 [2022-11-19 06:37:49,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:49,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2022-11-19 06:37:50,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:50,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:50,231 INFO L321 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-11-19 06:37:50,231 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 3 case distinctions, treesize of input 418 treesize of output 394 [2022-11-19 06:37:50,321 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 28 treesize of output 24 [2022-11-19 06:37:50,366 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 28 treesize of output 24 [2022-11-19 06:37:50,456 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 28 treesize of output 24 [2022-11-19 06:37:50,502 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 28 treesize of output 24 [2022-11-19 06:37:50,533 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 28 treesize of output 24 [2022-11-19 06:37:50,585 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 24 treesize of output 20 [2022-11-19 06:37:50,661 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-11-19 06:37:50,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 122 [2022-11-19 06:37:50,744 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 28 treesize of output 24 [2022-11-19 06:37:50,798 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 28 treesize of output 24 [2022-11-19 06:37:50,856 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 24 treesize of output 20 [2022-11-19 06:37:50,930 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-11-19 06:37:50,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 122 [2022-11-19 06:37:51,015 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 28 treesize of output 24 [2022-11-19 06:37:51,060 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 28 treesize of output 24 [2022-11-19 06:37:51,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:51,119 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:51,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:51,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:51,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:51,169 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-19 06:37:51,170 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 3 case distinctions, treesize of input 164 treesize of output 169 [2022-11-19 06:37:51,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:51,211 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:51,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:51,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:51,281 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:37:51,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:37:51,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:51,312 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:51,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:51,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:51,377 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:51,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:51,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:51,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:51,422 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-19 06:37:51,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2022-11-19 06:37:51,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:51,463 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:51,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:51,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:51,510 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:37:51,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:37:51,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:51,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:51,616 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-19 06:37:51,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2022-11-19 06:37:51,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:51,674 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:51,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:51,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:51,774 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-19 06:37:51,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-11-19 06:37:51,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:51,811 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:51,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:51,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:51,854 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:51,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:51,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:51,925 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:51,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:51,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:51,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:52,005 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-19 06:37:52,006 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 3 case distinctions, treesize of input 168 treesize of output 173 [2022-11-19 06:37:52,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:52,062 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:52,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:52,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:52,106 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:52,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:52,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:52,179 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:52,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:52,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:52,219 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:52,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:52,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:52,263 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:52,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:52,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:52,332 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:37:52,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:37:52,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:52,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:52,427 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-19 06:37:52,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2022-11-19 06:37:52,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:52,484 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:52,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:52,489 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:37:54,899 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5715#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-19 06:37:54,899 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:37:54,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:37:54,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-19 06:37:54,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189186783] [2022-11-19 06:37:54,900 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:37:54,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 06:37:54,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:37:54,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 06:37:54,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2022-11-19 06:37:54,901 INFO L87 Difference]: Start difference. First operand 166 states and 202 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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) [2022-11-19 06:37:55,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:37:55,188 INFO L93 Difference]: Finished difference Result 398 states and 510 transitions. [2022-11-19 06:37:55,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 06:37:55,188 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2022-11-19 06:37:55,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:37:55,190 INFO L225 Difference]: With dead ends: 398 [2022-11-19 06:37:55,191 INFO L226 Difference]: Without dead ends: 344 [2022-11-19 06:37:55,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 297 SyntacticMatches, 90 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2022-11-19 06:37:55,192 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 218 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:37:55,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 31 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:37:55,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-11-19 06:37:55,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 175. [2022-11-19 06:37:55,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.2471264367816093) internal successors, (217), 174 states have internal predecessors, (217), 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) [2022-11-19 06:37:55,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 217 transitions. [2022-11-19 06:37:55,264 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 217 transitions. Word has length 135 [2022-11-19 06:37:55,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:37:55,265 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 217 transitions. [2022-11-19 06:37:55,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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) [2022-11-19 06:37:55,265 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 217 transitions. [2022-11-19 06:37:55,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-19 06:37:55,267 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:37:55,267 INFO L195 NwaCegarLoop]: trace histogram [80, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:37:55,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 06:37:55,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-19 06:37:55,473 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:37:55,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:37:55,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1487790265, now seen corresponding path program 6 times [2022-11-19 06:37:55,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:37:55,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316309709] [2022-11-19 06:37:55,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:37:55,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:37:55,509 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:37:55,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1265750503] [2022-11-19 06:37:55,509 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:37:55,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:37:55,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:37:55,510 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:37:55,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 06:37:55,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 06:37:55,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:37:55,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 06:37:55,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:37:55,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3973 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 3941 trivial. 0 not checked. [2022-11-19 06:37:55,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:37:55,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3973 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 3941 trivial. 0 not checked. [2022-11-19 06:37:55,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:37:55,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316309709] [2022-11-19 06:37:55,720 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:37:55,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265750503] [2022-11-19 06:37:55,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265750503] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:37:55,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [140145013] [2022-11-19 06:37:55,723 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-19 06:37:55,723 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:37:55,723 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:37:55,724 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:37:55,724 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:37:55,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:55,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:55,791 INFO L321 Elim1Store]: treesize reduction 95, result has 28.0 percent of original size [2022-11-19 06:37:55,792 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 39 treesize of output 63 [2022-11-19 06:37:55,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:55,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:55,867 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 06:37:55,867 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 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 06:37:55,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:55,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2022-11-19 06:37:56,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:56,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:56,139 INFO L321 Elim1Store]: treesize reduction 89, result has 27.6 percent of original size [2022-11-19 06:37:56,139 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 4 case distinctions, treesize of input 410 treesize of output 396 [2022-11-19 06:37:56,299 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 28 treesize of output 24 [2022-11-19 06:37:56,353 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 28 treesize of output 24 [2022-11-19 06:37:56,449 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 24 treesize of output 20 [2022-11-19 06:37:56,527 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 28 treesize of output 24 [2022-11-19 06:37:56,565 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 28 treesize of output 24 [2022-11-19 06:37:56,629 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 28 treesize of output 24 [2022-11-19 06:37:56,695 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 142 treesize of output 120 [2022-11-19 06:37:56,741 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 28 treesize of output 24 [2022-11-19 06:37:56,783 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 28 treesize of output 24 [2022-11-19 06:37:56,836 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 28 treesize of output 24 [2022-11-19 06:37:56,898 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 142 treesize of output 120 [2022-11-19 06:37:56,958 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 28 treesize of output 24 [2022-11-19 06:37:56,995 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 28 treesize of output 24 [2022-11-19 06:37:57,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:57,055 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:37:57,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:37:57,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:57,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:57,145 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-19 06:37:57,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 175 [2022-11-19 06:37:57,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:57,231 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:57,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:57,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:57,294 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:57,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:57,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:57,337 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:57,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:57,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:57,384 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:57,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:57,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:57,475 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:37:57,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:37:57,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:57,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:57,553 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-19 06:37:57,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 144 treesize of output 163 [2022-11-19 06:37:57,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:57,613 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:57,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:57,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:57,673 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:37:57,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:37:57,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:57,718 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:57,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:57,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:57,810 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-19 06:37:57,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-11-19 06:37:57,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:57,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:57,963 INFO L321 Elim1Store]: treesize reduction 160, result has 35.7 percent of original size [2022-11-19 06:37:57,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 198 [2022-11-19 06:37:58,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:58,057 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:58,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:58,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:58,104 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:58,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:58,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:58,183 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:58,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:58,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:58,225 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:58,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:58,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:58,270 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:58,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:58,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:58,344 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:58,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:58,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:58,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:58,432 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-19 06:37:58,432 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 3 case distinctions, treesize of input 168 treesize of output 173 [2022-11-19 06:37:58,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:58,491 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:58,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:58,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:58,534 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:58,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:58,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:58,601 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:58,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:58,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:58,640 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:58,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:58,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:58,677 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:58,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:37:58,682 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:38:00,967 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7634#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-19 06:38:00,967 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:38:00,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:38:00,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2022-11-19 06:38:00,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348344456] [2022-11-19 06:38:00,967 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:38:00,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:38:00,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:38:00,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:38:00,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-11-19 06:38:00,969 INFO L87 Difference]: Start difference. First operand 175 states and 217 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:38:01,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:38:01,221 INFO L93 Difference]: Finished difference Result 293 states and 386 transitions. [2022-11-19 06:38:01,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 06:38:01,221 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2022-11-19 06:38:01,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:38:01,223 INFO L225 Difference]: With dead ends: 293 [2022-11-19 06:38:01,223 INFO L226 Difference]: Without dead ends: 234 [2022-11-19 06:38:01,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 307 SyntacticMatches, 103 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-19 06:38:01,224 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 22 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:38:01,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 21 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:38:01,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-11-19 06:38:01,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 181. [2022-11-19 06:38:01,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.2555555555555555) internal successors, (226), 180 states have internal predecessors, (226), 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) [2022-11-19 06:38:01,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 226 transitions. [2022-11-19 06:38:01,299 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 226 transitions. Word has length 141 [2022-11-19 06:38:01,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:38:01,300 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 226 transitions. [2022-11-19 06:38:01,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:38:01,300 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 226 transitions. [2022-11-19 06:38:01,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-19 06:38:01,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:38:01,302 INFO L195 NwaCegarLoop]: trace histogram [80, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:38:01,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 06:38:01,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-19 06:38:01,506 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:38:01,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:38:01,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1632527579, now seen corresponding path program 7 times [2022-11-19 06:38:01,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:38:01,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272735222] [2022-11-19 06:38:01,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:38:01,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:38:01,550 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:38:01,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1751369925] [2022-11-19 06:38:01,551 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 06:38:01,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:38:01,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:38:01,552 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:38:01,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 06:38:01,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:38:01,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 1015 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 06:38:01,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:38:02,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3984 backedges. 862 proven. 55 refuted. 0 times theorem prover too weak. 3067 trivial. 0 not checked. [2022-11-19 06:38:02,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:38:02,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3984 backedges. 862 proven. 55 refuted. 0 times theorem prover too weak. 3067 trivial. 0 not checked. [2022-11-19 06:38:02,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:38:02,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272735222] [2022-11-19 06:38:02,235 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:38:02,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751369925] [2022-11-19 06:38:02,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751369925] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:38:02,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1665314436] [2022-11-19 06:38:02,237 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-19 06:38:02,237 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:38:02,237 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:38:02,237 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:38:02,237 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:38:02,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:02,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:02,310 INFO L321 Elim1Store]: treesize reduction 95, result has 28.0 percent of original size [2022-11-19 06:38:02,311 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 39 treesize of output 63 [2022-11-19 06:38:02,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:02,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:02,386 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 06:38:02,387 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 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 06:38:02,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:02,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2022-11-19 06:38:02,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:02,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:02,655 INFO L321 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-11-19 06:38:02,656 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 3 case distinctions, treesize of input 418 treesize of output 394 [2022-11-19 06:38:02,758 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 28 treesize of output 24 [2022-11-19 06:38:02,810 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 28 treesize of output 24 [2022-11-19 06:38:02,912 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 28 treesize of output 24 [2022-11-19 06:38:02,954 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 28 treesize of output 24 [2022-11-19 06:38:02,986 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 28 treesize of output 24 [2022-11-19 06:38:03,036 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 24 treesize of output 20 [2022-11-19 06:38:03,108 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-11-19 06:38:03,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 122 [2022-11-19 06:38:03,195 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 28 treesize of output 24 [2022-11-19 06:38:03,265 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 28 treesize of output 24 [2022-11-19 06:38:03,318 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 24 treesize of output 20 [2022-11-19 06:38:03,405 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-11-19 06:38:03,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 122 [2022-11-19 06:38:03,495 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 28 treesize of output 24 [2022-11-19 06:38:03,538 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 28 treesize of output 24 [2022-11-19 06:38:03,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:03,593 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:03,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:03,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:03,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:03,639 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-19 06:38:03,639 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 3 case distinctions, treesize of input 164 treesize of output 169 [2022-11-19 06:38:03,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:03,681 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:03,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:03,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:03,748 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:38:03,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:38:03,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:03,793 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:03,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:03,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:03,864 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:03,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:03,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:03,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:03,908 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-19 06:38:03,908 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 3 case distinctions, treesize of input 152 treesize of output 157 [2022-11-19 06:38:03,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:03,947 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:03,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:03,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:04,009 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:04,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:04,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:04,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:04,063 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-19 06:38:04,063 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 3 case distinctions, treesize of input 146 treesize of output 151 [2022-11-19 06:38:04,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:04,105 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:04,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:04,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:04,202 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-19 06:38:04,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-11-19 06:38:04,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:04,241 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:04,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:04,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:04,284 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:04,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:04,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:04,352 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-19 06:38:04,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-11-19 06:38:04,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:04,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:04,478 INFO L321 Elim1Store]: treesize reduction 160, result has 35.7 percent of original size [2022-11-19 06:38:04,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 192 [2022-11-19 06:38:04,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:04,562 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:04,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:04,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:04,605 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:04,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:04,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:04,665 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:04,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:04,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:04,707 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:04,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:04,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:04,751 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:04,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:04,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:04,824 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:04,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:04,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:04,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:04,866 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-19 06:38:04,866 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 3 case distinctions, treesize of input 146 treesize of output 151 [2022-11-19 06:38:04,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:04,906 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:04,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:04,910 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:38:08,212 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9426#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-19 06:38:08,212 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:38:08,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:38:08,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-11-19 06:38:08,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477944945] [2022-11-19 06:38:08,213 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:38:08,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-19 06:38:08,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:38:08,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-19 06:38:08,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=823, Unknown=0, NotChecked=0, Total=1260 [2022-11-19 06:38:08,219 INFO L87 Difference]: Start difference. First operand 181 states and 226 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:38:09,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:38:09,470 INFO L93 Difference]: Finished difference Result 831 states and 1217 transitions. [2022-11-19 06:38:09,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-19 06:38:09,470 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2022-11-19 06:38:09,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:38:09,474 INFO L225 Difference]: With dead ends: 831 [2022-11-19 06:38:09,474 INFO L226 Difference]: Without dead ends: 664 [2022-11-19 06:38:09,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 303 SyntacticMatches, 90 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3855 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=756, Invalid=1406, Unknown=0, NotChecked=0, Total=2162 [2022-11-19 06:38:09,476 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 961 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 431 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 961 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 431 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:38:09,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [961 Valid, 68 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [431 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 06:38:09,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-11-19 06:38:09,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 313. [2022-11-19 06:38:09,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 1.185897435897436) internal successors, (370), 312 states have internal predecessors, (370), 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) [2022-11-19 06:38:09,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 370 transitions. [2022-11-19 06:38:09,604 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 370 transitions. Word has length 143 [2022-11-19 06:38:09,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:38:09,604 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 370 transitions. [2022-11-19 06:38:09,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:38:09,605 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 370 transitions. [2022-11-19 06:38:09,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-11-19 06:38:09,607 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:38:09,608 INFO L195 NwaCegarLoop]: trace histogram [176, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:38:09,620 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-19 06:38:09,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:38:09,820 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:38:09,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:38:09,820 INFO L85 PathProgramCache]: Analyzing trace with hash -398489307, now seen corresponding path program 8 times [2022-11-19 06:38:09,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:38:09,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067513576] [2022-11-19 06:38:09,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:38:09,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:38:09,889 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:38:09,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2022293723] [2022-11-19 06:38:09,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:38:09,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:38:09,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:38:09,891 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:38:09,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 06:38:10,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 06:38:10,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:38:10,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 06:38:10,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:38:10,463 INFO L134 CoverageAnalysis]: Checked inductivity of 16992 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16984 trivial. 0 not checked. [2022-11-19 06:38:10,463 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:38:10,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:38:10,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067513576] [2022-11-19 06:38:10,463 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:38:10,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022293723] [2022-11-19 06:38:10,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022293723] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:38:10,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:38:10,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:38:10,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81480156] [2022-11-19 06:38:10,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:38:10,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:38:10,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:38:10,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:38:10,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:38:10,465 INFO L87 Difference]: Start difference. First operand 313 states and 370 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 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) [2022-11-19 06:38:10,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:38:10,704 INFO L93 Difference]: Finished difference Result 493 states and 619 transitions. [2022-11-19 06:38:10,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:38:10,705 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 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 239 [2022-11-19 06:38:10,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:38:10,707 INFO L225 Difference]: With dead ends: 493 [2022-11-19 06:38:10,707 INFO L226 Difference]: Without dead ends: 390 [2022-11-19 06:38:10,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:38:10,709 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 34 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:38:10,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 11 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:38:10,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-11-19 06:38:10,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 316. [2022-11-19 06:38:10,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 1.1841269841269841) internal successors, (373), 315 states have internal predecessors, (373), 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) [2022-11-19 06:38:10,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 373 transitions. [2022-11-19 06:38:10,849 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 373 transitions. Word has length 239 [2022-11-19 06:38:10,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:38:10,849 INFO L495 AbstractCegarLoop]: Abstraction has 316 states and 373 transitions. [2022-11-19 06:38:10,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 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) [2022-11-19 06:38:10,850 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 373 transitions. [2022-11-19 06:38:10,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-11-19 06:38:10,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:38:10,853 INFO L195 NwaCegarLoop]: trace histogram [176, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:38:10,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-19 06:38:11,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-19 06:38:11,059 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:38:11,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:38:11,059 INFO L85 PathProgramCache]: Analyzing trace with hash -442724687, now seen corresponding path program 9 times [2022-11-19 06:38:11,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:38:11,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551488279] [2022-11-19 06:38:11,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:38:11,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:38:11,127 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:38:11,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [103970667] [2022-11-19 06:38:11,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:38:11,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:38:11,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:38:11,129 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:38:11,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 06:38:11,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 06:38:11,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:38:11,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 06:38:11,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:38:11,527 INFO L134 CoverageAnalysis]: Checked inductivity of 17019 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 16992 trivial. 0 not checked. [2022-11-19 06:38:11,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:38:11,567 INFO L134 CoverageAnalysis]: Checked inductivity of 17019 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 16992 trivial. 0 not checked. [2022-11-19 06:38:11,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:38:11,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551488279] [2022-11-19 06:38:11,568 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:38:11,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103970667] [2022-11-19 06:38:11,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103970667] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:38:11,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [197297606] [2022-11-19 06:38:11,570 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-19 06:38:11,571 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:38:11,571 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:38:11,571 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:38:11,571 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:38:11,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:11,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:11,666 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 06:38:11,666 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 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 06:38:11,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:11,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:11,683 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 39 treesize of output 49 [2022-11-19 06:38:11,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:11,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2022-11-19 06:38:11,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:11,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:11,979 INFO L321 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-11-19 06:38:11,979 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 3 case distinctions, treesize of input 418 treesize of output 394 [2022-11-19 06:38:12,072 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 28 treesize of output 24 [2022-11-19 06:38:12,134 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 28 treesize of output 24 [2022-11-19 06:38:12,244 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 24 treesize of output 20 [2022-11-19 06:38:12,321 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 28 treesize of output 24 [2022-11-19 06:38:12,366 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 28 treesize of output 24 [2022-11-19 06:38:12,429 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 28 treesize of output 24 [2022-11-19 06:38:12,508 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 142 treesize of output 120 [2022-11-19 06:38:12,555 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 28 treesize of output 24 [2022-11-19 06:38:12,623 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 28 treesize of output 24 [2022-11-19 06:38:12,686 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 24 treesize of output 20 [2022-11-19 06:38:12,778 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-11-19 06:38:12,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 122 [2022-11-19 06:38:12,883 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 28 treesize of output 24 [2022-11-19 06:38:12,930 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 28 treesize of output 24 [2022-11-19 06:38:12,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:12,985 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:38:12,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:38:13,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:13,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:13,081 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-11-19 06:38:13,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 185 [2022-11-19 06:38:13,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:13,159 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:13,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:13,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:13,223 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:38:13,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:38:13,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:13,261 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:13,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:13,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:13,325 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:13,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:13,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:13,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:13,373 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-19 06:38:13,373 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 3 case distinctions, treesize of input 152 treesize of output 157 [2022-11-19 06:38:13,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:13,416 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:13,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:13,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:13,462 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:13,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:13,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:13,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:13,504 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-19 06:38:13,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2022-11-19 06:38:13,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:13,545 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:13,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:13,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:13,666 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:13,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:13,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:13,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:13,750 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-19 06:38:13,750 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 3 case distinctions, treesize of input 174 treesize of output 179 [2022-11-19 06:38:13,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:13,807 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:13,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:13,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:13,855 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:13,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:13,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:13,937 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:13,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:14,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:14,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:14,034 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-19 06:38:14,034 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 3 case distinctions, treesize of input 168 treesize of output 173 [2022-11-19 06:38:14,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:14,093 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:14,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:14,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:14,137 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:14,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:14,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:14,209 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-19 06:38:14,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-11-19 06:38:14,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:14,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:14,350 INFO L321 Elim1Store]: treesize reduction 147, result has 41.0 percent of original size [2022-11-19 06:38:14,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 205 [2022-11-19 06:38:14,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:14,453 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:14,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:14,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:14,512 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:14,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:14,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:14,569 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:14,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:14,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:14,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:14,614 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-19 06:38:14,615 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 3 case distinctions, treesize of input 146 treesize of output 151 [2022-11-19 06:38:14,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:14,655 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:14,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:14,660 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:38:19,622 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15355#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-19 06:38:19,622 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:38:19,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:38:19,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-11-19 06:38:19,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808433647] [2022-11-19 06:38:19,623 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:38:19,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-19 06:38:19,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:38:19,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-19 06:38:19,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2022-11-19 06:38:19,624 INFO L87 Difference]: Start difference. First operand 316 states and 373 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 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) [2022-11-19 06:38:20,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:38:20,183 INFO L93 Difference]: Finished difference Result 493 states and 641 transitions. [2022-11-19 06:38:20,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 06:38:20,183 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 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 245 [2022-11-19 06:38:20,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:38:20,185 INFO L225 Difference]: With dead ends: 493 [2022-11-19 06:38:20,185 INFO L226 Difference]: Without dead ends: 358 [2022-11-19 06:38:20,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 741 GetRequests, 527 SyntacticMatches, 187 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1731 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=197, Invalid=615, Unknown=0, NotChecked=0, Total=812 [2022-11-19 06:38:20,187 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 55 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:38:20,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 30 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:38:20,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-11-19 06:38:20,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 326. [2022-11-19 06:38:20,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 1.1907692307692308) internal successors, (387), 325 states have internal predecessors, (387), 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) [2022-11-19 06:38:20,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 387 transitions. [2022-11-19 06:38:20,413 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 387 transitions. Word has length 245 [2022-11-19 06:38:20,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:38:20,414 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 387 transitions. [2022-11-19 06:38:20,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 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) [2022-11-19 06:38:20,414 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 387 transitions. [2022-11-19 06:38:20,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-11-19 06:38:20,416 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:38:20,416 INFO L195 NwaCegarLoop]: trace histogram [176, 8, 8, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:38:20,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-19 06:38:20,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 06:38:20,627 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:38:20,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:38:20,628 INFO L85 PathProgramCache]: Analyzing trace with hash -706577498, now seen corresponding path program 10 times [2022-11-19 06:38:20,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:38:20,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551552175] [2022-11-19 06:38:20,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:38:20,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:38:20,704 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:38:20,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [661232553] [2022-11-19 06:38:20,704 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 06:38:20,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:38:20,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:38:20,706 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:38:20,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-19 06:38:21,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:38:21,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 1932 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 06:38:21,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:38:21,755 INFO L134 CoverageAnalysis]: Checked inductivity of 17054 backedges. 3718 proven. 253 refuted. 0 times theorem prover too weak. 13083 trivial. 0 not checked. [2022-11-19 06:38:21,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:38:22,356 INFO L134 CoverageAnalysis]: Checked inductivity of 17054 backedges. 3718 proven. 253 refuted. 0 times theorem prover too weak. 13083 trivial. 0 not checked. [2022-11-19 06:38:22,356 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:38:22,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551552175] [2022-11-19 06:38:22,356 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:38:22,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661232553] [2022-11-19 06:38:22,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661232553] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:38:22,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [298403386] [2022-11-19 06:38:22,359 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-19 06:38:22,359 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:38:22,359 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:38:22,360 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:38:22,360 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:38:22,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:22,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:22,446 INFO L321 Elim1Store]: treesize reduction 95, result has 28.0 percent of original size [2022-11-19 06:38:22,446 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 39 treesize of output 63 [2022-11-19 06:38:22,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:22,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:22,529 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 06:38:22,529 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 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 06:38:22,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:22,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2022-11-19 06:38:22,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:22,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:22,789 INFO L321 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-11-19 06:38:22,789 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 3 case distinctions, treesize of input 418 treesize of output 394 [2022-11-19 06:38:22,895 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 28 treesize of output 24 [2022-11-19 06:38:22,949 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 28 treesize of output 24 [2022-11-19 06:38:23,034 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 28 treesize of output 24 [2022-11-19 06:38:23,076 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 28 treesize of output 24 [2022-11-19 06:38:23,108 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 28 treesize of output 24 [2022-11-19 06:38:23,158 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 24 treesize of output 20 [2022-11-19 06:38:23,232 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-11-19 06:38:23,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 122 [2022-11-19 06:38:23,319 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 28 treesize of output 24 [2022-11-19 06:38:23,373 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 28 treesize of output 24 [2022-11-19 06:38:23,464 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 24 treesize of output 20 [2022-11-19 06:38:23,541 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-11-19 06:38:23,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 122 [2022-11-19 06:38:23,633 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 28 treesize of output 24 [2022-11-19 06:38:23,669 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 28 treesize of output 24 [2022-11-19 06:38:23,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:23,731 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:23,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:23,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:23,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:23,776 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-19 06:38:23,777 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 3 case distinctions, treesize of input 164 treesize of output 169 [2022-11-19 06:38:23,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:23,834 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:23,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:23,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:23,904 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:38:23,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:38:23,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:23,941 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:23,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:23,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:24,008 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:24,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:24,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:24,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:24,050 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-19 06:38:24,051 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 3 case distinctions, treesize of input 152 treesize of output 157 [2022-11-19 06:38:24,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:24,089 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:24,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:24,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:24,136 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:38:24,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:38:24,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:24,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:24,216 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-19 06:38:24,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2022-11-19 06:38:24,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:24,268 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:24,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:24,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:24,367 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-19 06:38:24,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-11-19 06:38:24,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:24,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:24,489 INFO L321 Elim1Store]: treesize reduction 147, result has 41.0 percent of original size [2022-11-19 06:38:24,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 211 [2022-11-19 06:38:24,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:24,598 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:24,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:24,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:24,638 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:24,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:24,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:24,709 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:24,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:24,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:24,752 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:24,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:24,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:24,793 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:24,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:24,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:24,852 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:24,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:24,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:24,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:24,935 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-19 06:38:24,936 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 3 case distinctions, treesize of input 168 treesize of output 173 [2022-11-19 06:38:24,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:24,988 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:24,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:25,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:25,042 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:25,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:25,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:25,103 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:38:25,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:38:25,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:25,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:25,175 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-19 06:38:25,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2022-11-19 06:38:25,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:25,236 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:25,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:25,240 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:38:33,452 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18485#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-19 06:38:33,452 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:38:33,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:38:33,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2022-11-19 06:38:33,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238382693] [2022-11-19 06:38:33,453 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:38:33,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-19 06:38:33,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:38:33,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-19 06:38:33,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1385, Invalid=2155, Unknown=0, NotChecked=0, Total=3540 [2022-11-19 06:38:33,455 INFO L87 Difference]: Start difference. First operand 326 states and 387 transitions. Second operand has 50 states, 50 states have (on average 1.5) internal successors, (75), 49 states have internal predecessors, (75), 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) [2022-11-19 06:38:36,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:38:36,975 INFO L93 Difference]: Finished difference Result 1739 states and 2543 transitions. [2022-11-19 06:38:36,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-19 06:38:36,975 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.5) internal successors, (75), 49 states have internal predecessors, (75), 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 250 [2022-11-19 06:38:36,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:38:36,980 INFO L225 Difference]: With dead ends: 1739 [2022-11-19 06:38:36,981 INFO L226 Difference]: Without dead ends: 1439 [2022-11-19 06:38:36,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 771 GetRequests, 504 SyntacticMatches, 186 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15207 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=2604, Invalid=4202, Unknown=0, NotChecked=0, Total=6806 [2022-11-19 06:38:36,984 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 1762 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 754 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1762 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 1174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 754 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 06:38:36,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1762 Valid, 140 Invalid, 1174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [754 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 06:38:36,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1439 states. [2022-11-19 06:38:37,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1439 to 590. [2022-11-19 06:38:37,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 589 states have (on average 1.1460101867572157) internal successors, (675), 589 states have internal predecessors, (675), 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) [2022-11-19 06:38:37,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 675 transitions. [2022-11-19 06:38:37,252 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 675 transitions. Word has length 250 [2022-11-19 06:38:37,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:38:37,252 INFO L495 AbstractCegarLoop]: Abstraction has 590 states and 675 transitions. [2022-11-19 06:38:37,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.5) internal successors, (75), 49 states have internal predecessors, (75), 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) [2022-11-19 06:38:37,252 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 675 transitions. [2022-11-19 06:38:37,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2022-11-19 06:38:37,255 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:38:37,255 INFO L195 NwaCegarLoop]: trace histogram [368, 8, 8, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:38:37,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-19 06:38:37,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-19 06:38:37,456 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:38:37,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:38:37,456 INFO L85 PathProgramCache]: Analyzing trace with hash -612360282, now seen corresponding path program 11 times [2022-11-19 06:38:37,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:38:37,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117785717] [2022-11-19 06:38:37,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:38:37,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:38:37,583 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:38:37,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [581792146] [2022-11-19 06:38:37,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:38:37,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:38:37,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:38:37,584 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:38:37,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-19 06:38:38,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 06:38:38,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:38:38,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 06:38:38,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:38:38,667 INFO L134 CoverageAnalysis]: Checked inductivity of 70718 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 70698 trivial. 0 not checked. [2022-11-19 06:38:38,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:38:38,668 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:38:38,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117785717] [2022-11-19 06:38:38,668 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:38:38,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581792146] [2022-11-19 06:38:38,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581792146] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:38:38,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:38:38,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:38:38,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502773433] [2022-11-19 06:38:38,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:38:38,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:38:38,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:38:38,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:38:38,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:38:38,671 INFO L87 Difference]: Start difference. First operand 590 states and 675 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) [2022-11-19 06:38:39,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:38:39,108 INFO L93 Difference]: Finished difference Result 765 states and 911 transitions. [2022-11-19 06:38:39,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:38:39,109 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) Word has length 442 [2022-11-19 06:38:39,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:38:39,111 INFO L225 Difference]: With dead ends: 765 [2022-11-19 06:38:39,111 INFO L226 Difference]: Without dead ends: 594 [2022-11-19 06:38:39,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 439 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:38:39,113 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:38:39,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 11 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:38:39,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-11-19 06:38:39,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 591. [2022-11-19 06:38:39,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 1.1440677966101696) internal successors, (675), 590 states have internal predecessors, (675), 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) [2022-11-19 06:38:39,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 675 transitions. [2022-11-19 06:38:39,409 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 675 transitions. Word has length 442 [2022-11-19 06:38:39,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:38:39,410 INFO L495 AbstractCegarLoop]: Abstraction has 591 states and 675 transitions. [2022-11-19 06:38:39,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) [2022-11-19 06:38:39,410 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 675 transitions. [2022-11-19 06:38:39,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2022-11-19 06:38:39,412 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:38:39,412 INFO L195 NwaCegarLoop]: trace histogram [368, 8, 8, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:38:39,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-19 06:38:39,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-19 06:38:39,613 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:38:39,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:38:39,613 INFO L85 PathProgramCache]: Analyzing trace with hash -234018727, now seen corresponding path program 12 times [2022-11-19 06:38:39,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:38:39,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942381664] [2022-11-19 06:38:39,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:38:39,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:38:39,740 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:38:39,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1395852874] [2022-11-19 06:38:39,741 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:38:39,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:38:39,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:38:39,742 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:38:39,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-19 06:38:40,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 06:38:40,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:38:40,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 06:38:40,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:38:40,413 INFO L134 CoverageAnalysis]: Checked inductivity of 70728 backedges. 41 proven. 3 refuted. 0 times theorem prover too weak. 70684 trivial. 0 not checked. [2022-11-19 06:38:40,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:38:40,497 INFO L134 CoverageAnalysis]: Checked inductivity of 70728 backedges. 41 proven. 3 refuted. 0 times theorem prover too weak. 70684 trivial. 0 not checked. [2022-11-19 06:38:40,498 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:38:40,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942381664] [2022-11-19 06:38:40,498 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:38:40,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395852874] [2022-11-19 06:38:40,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395852874] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:38:40,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [840938613] [2022-11-19 06:38:40,500 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-19 06:38:40,500 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:38:40,501 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:38:40,501 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:38:40,501 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:38:40,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:40,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:40,571 INFO L321 Elim1Store]: treesize reduction 95, result has 28.0 percent of original size [2022-11-19 06:38:40,571 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 39 treesize of output 63 [2022-11-19 06:38:40,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:40,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:40,648 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 06:38:40,649 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 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 06:38:40,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:40,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2022-11-19 06:38:40,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:40,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:40,905 INFO L321 Elim1Store]: treesize reduction 89, result has 27.6 percent of original size [2022-11-19 06:38:40,906 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 4 case distinctions, treesize of input 410 treesize of output 396 [2022-11-19 06:38:41,058 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 28 treesize of output 24 [2022-11-19 06:38:41,105 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 28 treesize of output 24 [2022-11-19 06:38:41,201 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 28 treesize of output 24 [2022-11-19 06:38:41,241 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 28 treesize of output 24 [2022-11-19 06:38:41,273 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 28 treesize of output 24 [2022-11-19 06:38:41,320 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 28 treesize of output 24 [2022-11-19 06:38:41,385 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 142 treesize of output 120 [2022-11-19 06:38:41,430 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 28 treesize of output 24 [2022-11-19 06:38:41,473 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 28 treesize of output 24 [2022-11-19 06:38:41,524 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 28 treesize of output 24 [2022-11-19 06:38:41,618 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 142 treesize of output 120 [2022-11-19 06:38:41,661 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 28 treesize of output 24 [2022-11-19 06:38:41,704 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 28 treesize of output 24 [2022-11-19 06:38:41,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:41,758 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:38:41,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:38:41,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:41,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:41,833 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-19 06:38:41,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 175 [2022-11-19 06:38:41,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:41,886 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:41,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:41,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:41,947 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:38:41,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:38:41,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:41,984 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:41,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:42,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:42,048 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:42,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:42,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:42,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:42,090 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-19 06:38:42,090 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 3 case distinctions, treesize of input 152 treesize of output 157 [2022-11-19 06:38:42,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:42,131 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:42,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:42,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:42,178 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:38:42,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:38:42,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:42,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:42,258 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-11-19 06:38:42,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 167 [2022-11-19 06:38:42,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:42,328 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:42,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:42,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:42,427 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-19 06:38:42,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-11-19 06:38:42,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:42,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:42,544 INFO L321 Elim1Store]: treesize reduction 160, result has 35.7 percent of original size [2022-11-19 06:38:42,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 198 [2022-11-19 06:38:42,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:42,612 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:42,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:42,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:42,657 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:42,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:42,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:42,732 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:42,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:42,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:42,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:42,815 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-19 06:38:42,815 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 3 case distinctions, treesize of input 168 treesize of output 173 [2022-11-19 06:38:42,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:42,907 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:42,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:43,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:43,012 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:43,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:43,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:43,069 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-19 06:38:43,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-11-19 06:38:43,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:43,111 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:43,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:43,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:43,153 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:43,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:43,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:43,208 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:43,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:43,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:43,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:43,253 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-19 06:38:43,254 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 3 case distinctions, treesize of input 146 treesize of output 151 [2022-11-19 06:38:43,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:43,291 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:43,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:43,297 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:38:51,651 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29541#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-19 06:38:51,651 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:38:51,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:38:51,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-11-19 06:38:51,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215923290] [2022-11-19 06:38:51,652 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:38:51,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-19 06:38:51,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:38:51,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-19 06:38:51,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2022-11-19 06:38:51,653 INFO L87 Difference]: Start difference. First operand 591 states and 675 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 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) [2022-11-19 06:38:52,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:38:52,242 INFO L93 Difference]: Finished difference Result 1003 states and 1217 transitions. [2022-11-19 06:38:52,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 06:38:52,242 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 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 443 [2022-11-19 06:38:52,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:38:52,246 INFO L225 Difference]: With dead ends: 1003 [2022-11-19 06:38:52,246 INFO L226 Difference]: Without dead ends: 812 [2022-11-19 06:38:52,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1334 GetRequests, 930 SyntacticMatches, 379 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3999 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2022-11-19 06:38:52,248 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 41 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:38:52,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 40 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:38:52,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2022-11-19 06:38:52,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 607. [2022-11-19 06:38:52,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 606 states have (on average 1.1485148514851484) internal successors, (696), 606 states have internal predecessors, (696), 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) [2022-11-19 06:38:52,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 696 transitions. [2022-11-19 06:38:52,522 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 696 transitions. Word has length 443 [2022-11-19 06:38:52,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:38:52,522 INFO L495 AbstractCegarLoop]: Abstraction has 607 states and 696 transitions. [2022-11-19 06:38:52,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 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) [2022-11-19 06:38:52,523 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 696 transitions. [2022-11-19 06:38:52,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2022-11-19 06:38:52,525 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:38:52,525 INFO L195 NwaCegarLoop]: trace histogram [368, 13, 8, 8, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:38:52,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-19 06:38:52,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-19 06:38:52,726 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:38:52,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:38:52,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1654232045, now seen corresponding path program 13 times [2022-11-19 06:38:52,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:38:52,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517414249] [2022-11-19 06:38:52,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:38:52,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:38:52,862 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:38:52,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2121296934] [2022-11-19 06:38:52,863 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 06:38:52,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:38:52,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:38:52,864 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:38:52,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-19 06:38:54,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:38:54,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 3727 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-19 06:38:54,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:38:55,365 INFO L134 CoverageAnalysis]: Checked inductivity of 70890 backedges. 15478 proven. 1081 refuted. 0 times theorem prover too weak. 54331 trivial. 0 not checked. [2022-11-19 06:38:55,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:38:57,521 INFO L134 CoverageAnalysis]: Checked inductivity of 70890 backedges. 15478 proven. 1081 refuted. 0 times theorem prover too weak. 54331 trivial. 0 not checked. [2022-11-19 06:38:57,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:38:57,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517414249] [2022-11-19 06:38:57,522 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:38:57,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121296934] [2022-11-19 06:38:57,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121296934] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:38:57,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [506273794] [2022-11-19 06:38:57,524 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-19 06:38:57,524 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:38:57,524 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:38:57,525 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:38:57,525 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:38:57,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:57,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:57,594 INFO L321 Elim1Store]: treesize reduction 95, result has 28.0 percent of original size [2022-11-19 06:38:57,594 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 39 treesize of output 63 [2022-11-19 06:38:57,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:57,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:57,680 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 06:38:57,680 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 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 06:38:57,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:57,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2022-11-19 06:38:57,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:57,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:57,922 INFO L321 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-11-19 06:38:57,922 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 3 case distinctions, treesize of input 418 treesize of output 394 [2022-11-19 06:38:58,011 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 28 treesize of output 24 [2022-11-19 06:38:58,098 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 28 treesize of output 24 [2022-11-19 06:38:58,183 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 28 treesize of output 24 [2022-11-19 06:38:58,225 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 28 treesize of output 24 [2022-11-19 06:38:58,254 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 28 treesize of output 24 [2022-11-19 06:38:58,307 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 28 treesize of output 24 [2022-11-19 06:38:58,381 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 142 treesize of output 120 [2022-11-19 06:38:58,425 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 28 treesize of output 24 [2022-11-19 06:38:58,480 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 28 treesize of output 24 [2022-11-19 06:38:58,540 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 28 treesize of output 24 [2022-11-19 06:38:58,599 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 142 treesize of output 120 [2022-11-19 06:38:58,646 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 28 treesize of output 24 [2022-11-19 06:38:58,687 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 28 treesize of output 24 [2022-11-19 06:38:58,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:58,740 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:38:58,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:38:58,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:58,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:58,827 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-11-19 06:38:58,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 185 [2022-11-19 06:38:58,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:58,932 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:58,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:58,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:58,995 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:58,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:59,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:59,037 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:59,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:59,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:59,087 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:59,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:59,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:59,162 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:38:59,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:38:59,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:59,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:59,257 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-19 06:38:59,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 144 treesize of output 163 [2022-11-19 06:38:59,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:59,320 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:59,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:59,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:59,380 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:59,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:59,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:59,418 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:59,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:59,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:59,454 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:59,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:59,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:59,577 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-19 06:38:59,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-11-19 06:38:59,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:59,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:59,702 INFO L321 Elim1Store]: treesize reduction 147, result has 41.0 percent of original size [2022-11-19 06:38:59,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 211 [2022-11-19 06:38:59,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:59,775 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:59,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:59,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:59,816 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:38:59,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:38:59,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:59,886 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-19 06:38:59,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-11-19 06:38:59,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:59,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:00,002 INFO L321 Elim1Store]: treesize reduction 160, result has 35.7 percent of original size [2022-11-19 06:39:00,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 192 [2022-11-19 06:39:00,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:00,086 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:39:00,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:39:00,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:00,128 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:39:00,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:39:00,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:00,189 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-19 06:39:00,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-11-19 06:39:00,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:00,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:00,308 INFO L321 Elim1Store]: treesize reduction 147, result has 41.0 percent of original size [2022-11-19 06:39:00,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 205 [2022-11-19 06:39:00,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:00,409 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:39:00,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:39:00,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:00,454 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:39:00,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:39:00,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:00,519 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:39:00,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:39:00,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:00,563 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:39:00,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:39:00,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:00,601 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:39:00,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:39:00,605 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:39:26,548 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '35410#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-19 06:39:26,548 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:39:26,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:39:26,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 97 [2022-11-19 06:39:26,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745917007] [2022-11-19 06:39:26,549 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:39:26,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-11-19 06:39:26,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:39:26,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-11-19 06:39:26,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4998, Invalid=6344, Unknown=0, NotChecked=0, Total=11342 [2022-11-19 06:39:26,555 INFO L87 Difference]: Start difference. First operand 607 states and 696 transitions. Second operand has 98 states, 98 states have (on average 1.2551020408163265) internal successors, (123), 97 states have internal predecessors, (123), 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) [2022-11-19 06:39:41,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:39:41,566 INFO L93 Difference]: Finished difference Result 4184 states and 6130 transitions. [2022-11-19 06:39:41,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-11-19 06:39:41,567 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.2551020408163265) internal successors, (123), 97 states have internal predecessors, (123), 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 455 [2022-11-19 06:39:41,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:39:41,579 INFO L225 Difference]: With dead ends: 4184 [2022-11-19 06:39:41,579 INFO L226 Difference]: Without dead ends: 3627 [2022-11-19 06:39:41,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1410 GetRequests, 864 SyntacticMatches, 394 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62485 ImplicationChecksByTransitivity, 31.9s TimeCoverageRelationStatistics Valid=9745, Invalid=13817, Unknown=0, NotChecked=0, Total=23562 [2022-11-19 06:39:41,586 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 4160 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 2255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4160 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 3075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2255 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:39:41,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4160 Valid, 284 Invalid, 3075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2255 Valid, 820 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-19 06:39:41,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3627 states. [2022-11-19 06:39:42,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3627 to 1135. [2022-11-19 06:39:42,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 1134 states have (on average 1.1216931216931216) internal successors, (1272), 1134 states have internal predecessors, (1272), 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) [2022-11-19 06:39:42,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 1272 transitions. [2022-11-19 06:39:42,152 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 1272 transitions. Word has length 455 [2022-11-19 06:39:42,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:39:42,153 INFO L495 AbstractCegarLoop]: Abstraction has 1135 states and 1272 transitions. [2022-11-19 06:39:42,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.2551020408163265) internal successors, (123), 97 states have internal predecessors, (123), 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) [2022-11-19 06:39:42,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 1272 transitions. [2022-11-19 06:39:42,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 840 [2022-11-19 06:39:42,161 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:39:42,162 INFO L195 NwaCegarLoop]: trace histogram [752, 13, 8, 8, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:39:42,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-19 06:39:42,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:39:42,375 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:39:42,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:39:42,375 INFO L85 PathProgramCache]: Analyzing trace with hash 294079469, now seen corresponding path program 14 times [2022-11-19 06:39:42,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:39:42,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462715089] [2022-11-19 06:39:42,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:39:42,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:39:42,608 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:39:42,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [707322162] [2022-11-19 06:39:42,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:39:42,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:39:42,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:39:42,611 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:39:42,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-19 06:39:43,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 06:39:43,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:39:43,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 06:39:43,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:39:46,667 INFO L134 CoverageAnalysis]: Checked inductivity of 288810 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 288793 trivial. 0 not checked. [2022-11-19 06:39:46,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:39:48,084 INFO L134 CoverageAnalysis]: Checked inductivity of 288810 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 288793 trivial. 0 not checked. [2022-11-19 06:39:48,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:39:48,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462715089] [2022-11-19 06:39:48,085 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:39:48,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707322162] [2022-11-19 06:39:48,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707322162] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:39:48,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1242192555] [2022-11-19 06:39:48,087 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-19 06:39:48,087 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:39:48,088 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:39:48,088 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:39:48,088 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:39:48,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:48,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:48,157 INFO L321 Elim1Store]: treesize reduction 95, result has 28.0 percent of original size [2022-11-19 06:39:48,157 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 39 treesize of output 63 [2022-11-19 06:39:48,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:48,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:48,240 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 06:39:48,240 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 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 06:39:48,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:48,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2022-11-19 06:39:48,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:48,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:48,496 INFO L321 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-11-19 06:39:48,497 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 3 case distinctions, treesize of input 418 treesize of output 394 [2022-11-19 06:39:48,588 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 28 treesize of output 24 [2022-11-19 06:39:48,628 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 28 treesize of output 24 [2022-11-19 06:39:48,719 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 24 treesize of output 20 [2022-11-19 06:39:48,789 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 28 treesize of output 24 [2022-11-19 06:39:48,828 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 28 treesize of output 24 [2022-11-19 06:39:48,883 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 24 treesize of output 20 [2022-11-19 06:39:48,956 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-11-19 06:39:48,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 122 [2022-11-19 06:39:49,035 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 28 treesize of output 24 [2022-11-19 06:39:49,084 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 28 treesize of output 24 [2022-11-19 06:39:49,141 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 24 treesize of output 20 [2022-11-19 06:39:49,215 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-11-19 06:39:49,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 122 [2022-11-19 06:39:49,296 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 28 treesize of output 24 [2022-11-19 06:39:49,338 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 28 treesize of output 24 [2022-11-19 06:39:49,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:49,393 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:39:49,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:39:49,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:49,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:49,439 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-19 06:39:49,439 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 3 case distinctions, treesize of input 164 treesize of output 169 [2022-11-19 06:39:49,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:49,479 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:39:49,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:39:49,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:49,545 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:39:49,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:39:49,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:49,585 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:39:49,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:39:49,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:49,647 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:39:49,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:39:49,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:49,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:49,777 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-11-19 06:39:49,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 144 treesize of output 173 [2022-11-19 06:39:49,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:49,833 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:39:49,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:39:49,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:49,880 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:39:49,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:39:49,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:49,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:49,975 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-19 06:39:49,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2022-11-19 06:39:50,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:50,038 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:39:50,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:39:50,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:50,139 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:39:50,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:39:50,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:50,179 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:39:50,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:39:50,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:50,223 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:39:50,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:39:50,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:50,287 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-19 06:39:50,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-11-19 06:39:50,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:50,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:50,410 INFO L321 Elim1Store]: treesize reduction 147, result has 41.0 percent of original size [2022-11-19 06:39:50,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 205 [2022-11-19 06:39:50,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:50,491 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:39:50,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:39:50,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:50,531 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:39:50,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:39:50,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:50,592 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-19 06:39:50,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-11-19 06:39:50,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:50,633 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:39:50,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:39:50,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:50,674 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:39:50,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:39:50,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:50,726 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:39:50,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:39:50,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:50,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:50,767 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-19 06:39:50,768 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 3 case distinctions, treesize of input 146 treesize of output 151 [2022-11-19 06:39:50,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:50,808 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:39:50,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:39:50,812 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:40:02,968 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '50757#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-19 06:40:02,968 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:40:02,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:40:02,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2022-11-19 06:40:02,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113428267] [2022-11-19 06:40:02,969 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:40:02,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 06:40:02,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:40:02,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 06:40:02,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2022-11-19 06:40:02,971 INFO L87 Difference]: Start difference. First operand 1135 states and 1272 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 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) [2022-11-19 06:40:03,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:40:03,673 INFO L93 Difference]: Finished difference Result 1449 states and 1694 transitions. [2022-11-19 06:40:03,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:40:03,674 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 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 839 [2022-11-19 06:40:03,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:40:03,679 INFO L225 Difference]: With dead ends: 1449 [2022-11-19 06:40:03,679 INFO L226 Difference]: Without dead ends: 1139 [2022-11-19 06:40:03,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2517 GetRequests, 1739 SyntacticMatches, 762 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3129 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2022-11-19 06:40:03,682 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 48 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:40:03,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 6 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:40:03,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2022-11-19 06:40:04,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1136. [2022-11-19 06:40:04,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 1.118942731277533) internal successors, (1270), 1135 states have internal predecessors, (1270), 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) [2022-11-19 06:40:04,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1270 transitions. [2022-11-19 06:40:04,330 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1270 transitions. Word has length 839 [2022-11-19 06:40:04,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:40:04,331 INFO L495 AbstractCegarLoop]: Abstraction has 1136 states and 1270 transitions. [2022-11-19 06:40:04,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 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) [2022-11-19 06:40:04,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1270 transitions. [2022-11-19 06:40:04,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 845 [2022-11-19 06:40:04,340 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:40:04,340 INFO L195 NwaCegarLoop]: trace histogram [752, 13, 8, 8, 8, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:40:04,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-11-19 06:40:04,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:40:04,548 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:40:04,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:40:04,548 INFO L85 PathProgramCache]: Analyzing trace with hash 814504007, now seen corresponding path program 15 times [2022-11-19 06:40:04,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:40:04,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193095794] [2022-11-19 06:40:04,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:40:04,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:40:04,782 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:40:04,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [967170808] [2022-11-19 06:40:04,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:40:04,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:40:04,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:40:04,783 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:40:04,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-19 06:40:05,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 06:40:05,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:40:05,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 06:40:05,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:40:06,107 INFO L134 CoverageAnalysis]: Checked inductivity of 288855 backedges. 164 proven. 30 refuted. 0 times theorem prover too weak. 288661 trivial. 0 not checked. [2022-11-19 06:40:06,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:40:06,204 INFO L134 CoverageAnalysis]: Checked inductivity of 288855 backedges. 157 proven. 37 refuted. 0 times theorem prover too weak. 288661 trivial. 0 not checked. [2022-11-19 06:40:06,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:40:06,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193095794] [2022-11-19 06:40:06,205 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:40:06,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967170808] [2022-11-19 06:40:06,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967170808] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:40:06,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [43764711] [2022-11-19 06:40:06,207 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-19 06:40:06,208 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:40:06,209 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:40:06,209 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:40:06,209 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:40:06,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:06,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:06,279 INFO L321 Elim1Store]: treesize reduction 95, result has 28.0 percent of original size [2022-11-19 06:40:06,280 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 39 treesize of output 63 [2022-11-19 06:40:06,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:06,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:06,354 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 06:40:06,354 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 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 06:40:06,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:06,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2022-11-19 06:40:06,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:06,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:06,664 INFO L321 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-11-19 06:40:06,664 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 3 case distinctions, treesize of input 418 treesize of output 394 [2022-11-19 06:40:06,769 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 28 treesize of output 24 [2022-11-19 06:40:06,821 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 28 treesize of output 24 [2022-11-19 06:40:06,912 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 28 treesize of output 24 [2022-11-19 06:40:06,970 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 28 treesize of output 24 [2022-11-19 06:40:07,002 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 28 treesize of output 24 [2022-11-19 06:40:07,053 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 24 treesize of output 20 [2022-11-19 06:40:07,129 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-11-19 06:40:07,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 122 [2022-11-19 06:40:07,212 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 28 treesize of output 24 [2022-11-19 06:40:07,261 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 28 treesize of output 24 [2022-11-19 06:40:07,305 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 24 treesize of output 20 [2022-11-19 06:40:07,388 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-11-19 06:40:07,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 122 [2022-11-19 06:40:07,468 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 28 treesize of output 24 [2022-11-19 06:40:07,509 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 28 treesize of output 24 [2022-11-19 06:40:07,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:07,573 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:40:07,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:40:07,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:07,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:07,615 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-19 06:40:07,616 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 3 case distinctions, treesize of input 164 treesize of output 169 [2022-11-19 06:40:07,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:07,670 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:40:07,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:40:07,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:07,743 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:40:07,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:40:07,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:07,793 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:40:07,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:40:07,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:07,846 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:40:07,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:40:07,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:07,929 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:40:07,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:40:07,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:07,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:07,981 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-19 06:40:07,982 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 3 case distinctions, treesize of input 152 treesize of output 157 [2022-11-19 06:40:08,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:08,025 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:40:08,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:40:08,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:08,072 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:40:08,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:40:08,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:08,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:08,155 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-19 06:40:08,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2022-11-19 06:40:08,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:08,213 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:40:08,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:40:08,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:08,329 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:40:08,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:40:08,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:08,371 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:40:08,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:40:08,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:08,416 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:40:08,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:40:08,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:08,490 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-19 06:40:08,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-11-19 06:40:08,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:08,538 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:40:08,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:40:08,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:08,583 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:40:08,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:40:08,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:08,703 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:40:08,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:40:08,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:08,742 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:40:08,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:40:08,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:08,785 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:40:08,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:40:08,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:08,843 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:40:08,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:40:08,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:08,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:08,943 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-11-19 06:40:08,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 167 [2022-11-19 06:40:09,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:09,029 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:40:09,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:40:09,034 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:40:29,060 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '60722#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-19 06:40:29,060 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:40:29,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:40:29,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-11-19 06:40:29,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595100678] [2022-11-19 06:40:29,061 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:40:29,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-19 06:40:29,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:40:29,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-19 06:40:29,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2022-11-19 06:40:29,063 INFO L87 Difference]: Start difference. First operand 1136 states and 1270 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 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) [2022-11-19 06:40:30,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:40:30,201 INFO L93 Difference]: Finished difference Result 1567 states and 1858 transitions. [2022-11-19 06:40:30,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-19 06:40:30,201 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 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 844 [2022-11-19 06:40:30,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:40:30,206 INFO L225 Difference]: With dead ends: 1567 [2022-11-19 06:40:30,206 INFO L226 Difference]: Without dead ends: 1198 [2022-11-19 06:40:30,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2547 GetRequests, 1744 SyntacticMatches, 763 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10446 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=401, Invalid=1321, Unknown=0, NotChecked=0, Total=1722 [2022-11-19 06:40:30,208 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 60 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:40:30,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 36 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:40:30,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1198 states. [2022-11-19 06:40:30,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1198 to 1161. [2022-11-19 06:40:30,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1161 states, 1160 states have (on average 1.1267241379310344) internal successors, (1307), 1160 states have internal predecessors, (1307), 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) [2022-11-19 06:40:30,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 1307 transitions. [2022-11-19 06:40:30,931 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 1307 transitions. Word has length 844 [2022-11-19 06:40:30,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:40:30,932 INFO L495 AbstractCegarLoop]: Abstraction has 1161 states and 1307 transitions. [2022-11-19 06:40:30,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 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) [2022-11-19 06:40:30,932 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 1307 transitions. [2022-11-19 06:40:30,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 849 [2022-11-19 06:40:30,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:40:30,940 INFO L195 NwaCegarLoop]: trace histogram [752, 17, 8, 8, 8, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:40:30,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-19 06:40:31,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-19 06:40:31,149 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:40:31,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:40:31,150 INFO L85 PathProgramCache]: Analyzing trace with hash -937638281, now seen corresponding path program 16 times [2022-11-19 06:40:31,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:40:31,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953891049] [2022-11-19 06:40:31,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:40:31,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:40:31,391 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:40:31,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [533229492] [2022-11-19 06:40:31,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 06:40:31,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:40:31,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:40:31,392 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:40:31,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-19 06:40:33,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:40:33,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 7246 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-19 06:40:33,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:40:38,362 INFO L134 CoverageAnalysis]: Checked inductivity of 288941 backedges. 63190 proven. 4465 refuted. 0 times theorem prover too weak. 221286 trivial. 0 not checked. [2022-11-19 06:40:38,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:40:46,744 INFO L134 CoverageAnalysis]: Checked inductivity of 288941 backedges. 63190 proven. 4465 refuted. 0 times theorem prover too weak. 221286 trivial. 0 not checked. [2022-11-19 06:40:46,744 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:40:46,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953891049] [2022-11-19 06:40:46,744 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:40:46,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533229492] [2022-11-19 06:40:46,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533229492] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:40:46,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1116034365] [2022-11-19 06:40:46,751 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-19 06:40:46,751 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:40:46,752 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:40:46,752 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:40:46,752 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:40:46,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:46,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:46,816 INFO L321 Elim1Store]: treesize reduction 95, result has 28.0 percent of original size [2022-11-19 06:40:46,816 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 39 treesize of output 63 [2022-11-19 06:40:46,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:46,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:46,889 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 06:40:46,890 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 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 06:40:46,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:46,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2022-11-19 06:40:47,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:47,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:47,139 INFO L321 Elim1Store]: treesize reduction 89, result has 27.6 percent of original size [2022-11-19 06:40:47,140 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 4 case distinctions, treesize of input 410 treesize of output 396 [2022-11-19 06:40:47,296 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 28 treesize of output 24 [2022-11-19 06:40:47,343 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 28 treesize of output 24 [2022-11-19 06:40:47,448 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 24 treesize of output 20 [2022-11-19 06:40:47,514 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 28 treesize of output 24 [2022-11-19 06:40:47,560 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 28 treesize of output 24 [2022-11-19 06:40:47,678 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 28 treesize of output 24 [2022-11-19 06:40:47,740 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 142 treesize of output 120 [2022-11-19 06:40:47,789 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 28 treesize of output 24 [2022-11-19 06:40:47,839 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 28 treesize of output 24 [2022-11-19 06:40:47,894 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 28 treesize of output 24 [2022-11-19 06:40:47,967 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 142 treesize of output 120 [2022-11-19 06:40:48,019 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 28 treesize of output 24 [2022-11-19 06:40:48,069 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 28 treesize of output 24 [2022-11-19 06:40:48,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:48,125 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:40:48,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:40:48,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:48,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:48,210 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-11-19 06:40:48,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 185 [2022-11-19 06:40:48,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:48,326 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:40:48,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:40:48,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:48,392 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:40:48,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:40:48,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:48,444 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:40:48,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:40:48,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:48,486 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:40:48,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:40:48,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:48,560 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:40:48,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:40:48,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:48,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:48,606 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-19 06:40:48,606 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 3 case distinctions, treesize of input 152 treesize of output 157 [2022-11-19 06:40:48,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:48,652 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:40:48,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:40:48,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:48,699 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:40:48,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:40:48,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:48,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:48,781 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-11-19 06:40:48,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 167 [2022-11-19 06:40:48,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:48,873 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:40:48,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:40:48,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:48,968 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-19 06:40:48,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-11-19 06:40:49,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:49,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:49,088 INFO L321 Elim1Store]: treesize reduction 160, result has 35.7 percent of original size [2022-11-19 06:40:49,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 198 [2022-11-19 06:40:49,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:49,154 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:40:49,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:40:49,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:49,200 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:40:49,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:40:49,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:49,266 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-19 06:40:49,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-11-19 06:40:49,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:49,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:49,401 INFO L321 Elim1Store]: treesize reduction 160, result has 35.7 percent of original size [2022-11-19 06:40:49,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 192 [2022-11-19 06:40:49,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:49,486 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:40:49,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:40:49,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:49,533 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:40:49,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:40:49,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:49,598 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-19 06:40:49,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-11-19 06:40:49,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:49,636 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:40:49,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:40:49,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:49,680 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:40:49,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:40:49,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:49,732 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:40:49,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:40:49,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:49,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:49,804 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-19 06:40:49,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2022-11-19 06:40:49,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:49,857 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:40:49,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:40:49,860 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:42:20,738 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '71202#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-19 06:42:20,738 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:42:20,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:42:20,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 193 [2022-11-19 06:42:20,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744461827] [2022-11-19 06:42:20,739 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:42:20,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2022-11-19 06:42:20,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:42:20,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2022-11-19 06:42:20,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19169, Invalid=22243, Unknown=0, NotChecked=0, Total=41412 [2022-11-19 06:42:20,750 INFO L87 Difference]: Start difference. First operand 1161 states and 1307 transitions. Second operand has 194 states, 194 states have (on average 1.1288659793814433) internal successors, (219), 193 states have internal predecessors, (219), 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) [2022-11-19 06:44:11,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:44:11,394 INFO L93 Difference]: Finished difference Result 9848 states and 14847 transitions. [2022-11-19 06:44:11,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-11-19 06:44:11,395 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 1.1288659793814433) internal successors, (219), 193 states have internal predecessors, (219), 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 848 [2022-11-19 06:44:11,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:44:11,419 INFO L225 Difference]: With dead ends: 9848 [2022-11-19 06:44:11,419 INFO L226 Difference]: Without dead ends: 8785 [2022-11-19 06:44:11,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2637 GetRequests, 1578 SyntacticMatches, 762 SemanticMatches, 297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240567 ImplicationChecksByTransitivity, 114.7s TimeCoverageRelationStatistics Valid=37884, Invalid=51218, Unknown=0, NotChecked=0, Total=89102 [2022-11-19 06:44:11,431 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 7259 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 1639 mSolverCounterSat, 3296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7259 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 4935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3296 IncrementalHoareTripleChecker+Valid, 1639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:44:11,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7259 Valid, 572 Invalid, 4935 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3296 Valid, 1639 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-11-19 06:44:11,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8785 states. [2022-11-19 06:44:12,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8785 to 2217. [2022-11-19 06:44:12,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2217 states, 2216 states have (on average 1.1096570397111913) internal successors, (2459), 2216 states have internal predecessors, (2459), 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) [2022-11-19 06:44:12,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2217 states to 2217 states and 2459 transitions. [2022-11-19 06:44:12,705 INFO L78 Accepts]: Start accepts. Automaton has 2217 states and 2459 transitions. Word has length 848 [2022-11-19 06:44:12,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:44:12,705 INFO L495 AbstractCegarLoop]: Abstraction has 2217 states and 2459 transitions. [2022-11-19 06:44:12,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 1.1288659793814433) internal successors, (219), 193 states have internal predecessors, (219), 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) [2022-11-19 06:44:12,706 INFO L276 IsEmpty]: Start isEmpty. Operand 2217 states and 2459 transitions. [2022-11-19 06:44:12,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1617 [2022-11-19 06:44:12,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:44:12,729 INFO L195 NwaCegarLoop]: trace histogram [1520, 17, 8, 8, 8, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:44:12,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-19 06:44:12,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-19 06:44:12,939 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:44:12,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:44:12,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1171215991, now seen corresponding path program 17 times [2022-11-19 06:44:12,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:44:12,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327294891] [2022-11-19 06:44:12,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:12,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:44:13,403 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:44:13,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1196019941] [2022-11-19 06:44:13,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:44:13,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:44:13,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:44:13,406 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:44:13,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-19 06:44:15,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 06:44:15,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:44:15,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 06:44:15,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:44:18,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1167149 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 1167090 trivial. 0 not checked. [2022-11-19 06:44:18,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:44:21,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1167149 backedges. 14 proven. 45 refuted. 0 times theorem prover too weak. 1167090 trivial. 0 not checked. [2022-11-19 06:44:21,851 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:44:21,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327294891] [2022-11-19 06:44:21,851 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:44:21,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196019941] [2022-11-19 06:44:21,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196019941] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:44:21,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1284291500] [2022-11-19 06:44:21,854 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-19 06:44:21,855 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:44:21,855 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:44:21,855 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:44:21,855 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:44:21,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:21,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:21,923 INFO L321 Elim1Store]: treesize reduction 95, result has 28.0 percent of original size [2022-11-19 06:44:21,923 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 39 treesize of output 63 [2022-11-19 06:44:21,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:21,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:21,997 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 06:44:21,998 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 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 06:44:22,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:22,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2022-11-19 06:44:22,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:22,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:22,262 INFO L321 Elim1Store]: treesize reduction 89, result has 27.6 percent of original size [2022-11-19 06:44:22,262 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 4 case distinctions, treesize of input 410 treesize of output 396 [2022-11-19 06:44:22,425 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 28 treesize of output 24 [2022-11-19 06:44:22,472 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 28 treesize of output 24 [2022-11-19 06:44:22,684 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 28 treesize of output 24 [2022-11-19 06:44:22,729 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 28 treesize of output 24 [2022-11-19 06:44:22,764 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 28 treesize of output 24 [2022-11-19 06:44:22,812 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 24 treesize of output 20 [2022-11-19 06:44:22,904 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-11-19 06:44:22,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 122 [2022-11-19 06:44:22,989 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 28 treesize of output 24 [2022-11-19 06:44:23,030 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 28 treesize of output 24 [2022-11-19 06:44:23,078 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 28 treesize of output 24 [2022-11-19 06:44:23,139 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 142 treesize of output 120 [2022-11-19 06:44:23,185 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 28 treesize of output 24 [2022-11-19 06:44:23,226 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 28 treesize of output 24 [2022-11-19 06:44:23,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:23,280 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:44:23,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:44:23,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:23,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:23,324 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-19 06:44:23,325 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 3 case distinctions, treesize of input 164 treesize of output 169 [2022-11-19 06:44:23,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:23,367 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:44:23,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:44:23,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:23,432 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:44:23,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:44:23,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:23,482 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:44:23,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:44:23,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:23,525 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:44:23,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:44:23,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:23,609 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:44:23,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:44:23,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:23,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:23,655 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-19 06:44:23,655 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 3 case distinctions, treesize of input 152 treesize of output 157 [2022-11-19 06:44:23,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:23,697 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:44:23,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:44:23,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:23,745 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:44:23,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:44:23,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:23,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:23,822 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-19 06:44:23,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2022-11-19 06:44:23,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:23,871 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:44:23,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:44:23,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:23,968 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-19 06:44:23,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-11-19 06:44:24,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:24,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:24,096 INFO L321 Elim1Store]: treesize reduction 147, result has 41.0 percent of original size [2022-11-19 06:44:24,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 211 [2022-11-19 06:44:24,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:24,189 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:44:24,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:44:24,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:24,230 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:44:24,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:44:24,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:24,301 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:44:24,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:44:24,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:24,342 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:44:24,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:44:24,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:24,386 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:44:24,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:44:24,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:24,549 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:44:24,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:44:24,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:24,592 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:44:24,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:44:24,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:24,633 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:44:24,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:44:24,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:24,686 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:44:24,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:44:24,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:24,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:24,761 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-19 06:44:24,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2022-11-19 06:44:24,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:24,823 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:44:24,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:44:24,828 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:44:49,750 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '104370#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-19 06:44:49,750 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:44:49,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:44:49,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-19 06:44:49,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425289781] [2022-11-19 06:44:49,751 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:44:49,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 06:44:49,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:44:49,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 06:44:49,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2022-11-19 06:44:49,753 INFO L87 Difference]: Start difference. First operand 2217 states and 2459 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 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) [2022-11-19 06:44:50,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:44:50,857 INFO L93 Difference]: Finished difference Result 2878 states and 3342 transitions. [2022-11-19 06:44:50,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 06:44:50,857 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 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) Word has length 1616 [2022-11-19 06:44:50,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:44:50,862 INFO L225 Difference]: With dead ends: 2878 [2022-11-19 06:44:50,862 INFO L226 Difference]: Without dead ends: 2213 [2022-11-19 06:44:50,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4848 GetRequests, 3300 SyntacticMatches, 1530 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10839 ImplicationChecksByTransitivity, 24.6s TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2022-11-19 06:44:50,864 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 62 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:44:50,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 20 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:44:50,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2213 states. [2022-11-19 06:44:51,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2213 to 2204. [2022-11-19 06:44:51,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2204 states, 2203 states have (on average 1.1030413073082161) internal successors, (2430), 2203 states have internal predecessors, (2430), 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) [2022-11-19 06:44:51,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2204 states to 2204 states and 2430 transitions. [2022-11-19 06:44:51,853 INFO L78 Accepts]: Start accepts. Automaton has 2204 states and 2430 transitions. Word has length 1616 [2022-11-19 06:44:51,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:44:51,854 INFO L495 AbstractCegarLoop]: Abstraction has 2204 states and 2430 transitions. [2022-11-19 06:44:51,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 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) [2022-11-19 06:44:51,854 INFO L276 IsEmpty]: Start isEmpty. Operand 2204 states and 2430 transitions. [2022-11-19 06:44:51,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1634 [2022-11-19 06:44:51,873 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:44:51,874 INFO L195 NwaCegarLoop]: trace histogram [1520, 32, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:44:51,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-19 06:44:52,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-19 06:44:52,075 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:44:52,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:44:52,075 INFO L85 PathProgramCache]: Analyzing trace with hash -816145346, now seen corresponding path program 18 times [2022-11-19 06:44:52,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:44:52,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867629701] [2022-11-19 06:44:52,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:52,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:44:52,576 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:44:52,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [305112325] [2022-11-19 06:44:52,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:44:52,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:44:52,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:44:52,583 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:44:52,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-19 06:44:54,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 06:44:54,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:44:54,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 06:44:54,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:44:55,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1167664 backedges. 337 proven. 32 refuted. 0 times theorem prover too weak. 1167295 trivial. 0 not checked. [2022-11-19 06:44:55,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:44:55,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1167664 backedges. 337 proven. 32 refuted. 0 times theorem prover too weak. 1167295 trivial. 0 not checked. [2022-11-19 06:44:55,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:44:55,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867629701] [2022-11-19 06:44:55,283 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:44:55,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305112325] [2022-11-19 06:44:55,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305112325] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:44:55,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1225503971] [2022-11-19 06:44:55,286 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-19 06:44:55,286 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:44:55,287 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:44:55,287 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:44:55,287 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:44:55,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:55,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:55,368 INFO L321 Elim1Store]: treesize reduction 95, result has 28.0 percent of original size [2022-11-19 06:44:55,368 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 39 treesize of output 63 [2022-11-19 06:44:55,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:55,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:55,441 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 06:44:55,441 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 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 06:44:55,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:55,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2022-11-19 06:44:55,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:55,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:55,704 INFO L321 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-11-19 06:44:55,704 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 3 case distinctions, treesize of input 418 treesize of output 394 [2022-11-19 06:44:55,801 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 28 treesize of output 24 [2022-11-19 06:44:55,845 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 28 treesize of output 24 [2022-11-19 06:44:55,940 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 28 treesize of output 24 [2022-11-19 06:44:55,977 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 28 treesize of output 24 [2022-11-19 06:44:56,131 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 28 treesize of output 24 [2022-11-19 06:44:56,183 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 28 treesize of output 24 [2022-11-19 06:44:56,239 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 142 treesize of output 120 [2022-11-19 06:44:56,288 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 28 treesize of output 24 [2022-11-19 06:44:56,329 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 28 treesize of output 24 [2022-11-19 06:44:56,378 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 28 treesize of output 24 [2022-11-19 06:44:56,438 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 142 treesize of output 120 [2022-11-19 06:44:56,486 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 28 treesize of output 24 [2022-11-19 06:44:56,528 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 28 treesize of output 24 [2022-11-19 06:44:56,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:56,581 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:44:56,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:44:56,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:56,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:56,676 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-11-19 06:44:56,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 185 [2022-11-19 06:44:56,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:56,741 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:44:56,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:44:56,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:56,806 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:44:56,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:44:56,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:56,844 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:44:56,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:44:56,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:56,909 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:44:56,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:44:56,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:56,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:56,955 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-19 06:44:56,956 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 3 case distinctions, treesize of input 152 treesize of output 157 [2022-11-19 06:44:56,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:56,995 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:44:56,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:44:57,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:57,041 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:44:57,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:44:57,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:57,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:57,084 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-19 06:44:57,085 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 3 case distinctions, treesize of input 146 treesize of output 151 [2022-11-19 06:44:57,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:57,125 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:44:57,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:44:57,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:57,224 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:44:57,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:44:57,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:57,265 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:44:57,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:44:57,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:57,311 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:44:57,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:44:57,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:57,383 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-19 06:44:57,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-11-19 06:44:57,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:57,424 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:44:57,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:44:57,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:57,467 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:44:57,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:44:57,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:57,532 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-19 06:44:57,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-11-19 06:44:57,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:57,570 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:44:57,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:44:57,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:57,615 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:44:57,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:44:57,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:57,677 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:44:57,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:44:57,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:57,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:57,760 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-19 06:44:57,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2022-11-19 06:44:57,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:57,818 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:44:57,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:44:57,822 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:45:39,300 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '123772#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-19 06:45:39,300 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:45:39,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:45:39,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-11-19 06:45:39,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874111116] [2022-11-19 06:45:39,302 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:45:39,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-19 06:45:39,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:45:39,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-19 06:45:39,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2022-11-19 06:45:39,305 INFO L87 Difference]: Start difference. First operand 2204 states and 2430 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 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) [2022-11-19 06:45:42,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:45:42,728 INFO L93 Difference]: Finished difference Result 7531 states and 8391 transitions. [2022-11-19 06:45:42,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-19 06:45:42,728 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 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 1633 [2022-11-19 06:45:42,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:45:42,753 INFO L225 Difference]: With dead ends: 7531 [2022-11-19 06:45:42,754 INFO L226 Difference]: Without dead ends: 6887 [2022-11-19 06:45:42,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4928 GetRequests, 3353 SyntacticMatches, 1530 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28285 ImplicationChecksByTransitivity, 41.5s TimeCoverageRelationStatistics Valid=494, Invalid=1668, Unknown=0, NotChecked=0, Total=2162 [2022-11-19 06:45:42,757 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 140 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:45:42,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 77 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:45:42,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6887 states. [2022-11-19 06:45:44,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6887 to 2252. [2022-11-19 06:45:44,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2252 states, 2251 states have (on average 1.104398045313194) internal successors, (2486), 2251 states have internal predecessors, (2486), 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) [2022-11-19 06:45:44,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2252 states to 2252 states and 2486 transitions. [2022-11-19 06:45:44,011 INFO L78 Accepts]: Start accepts. Automaton has 2252 states and 2486 transitions. Word has length 1633 [2022-11-19 06:45:44,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:45:44,012 INFO L495 AbstractCegarLoop]: Abstraction has 2252 states and 2486 transitions. [2022-11-19 06:45:44,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 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) [2022-11-19 06:45:44,012 INFO L276 IsEmpty]: Start isEmpty. Operand 2252 states and 2486 transitions. [2022-11-19 06:45:44,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1682 [2022-11-19 06:45:44,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:45:44,039 INFO L195 NwaCegarLoop]: trace histogram [1520, 64, 16, 16, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:45:44,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-19 06:45:44,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:45:44,250 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:45:44,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:45:44,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1937700894, now seen corresponding path program 19 times [2022-11-19 06:45:44,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:45:44,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259393268] [2022-11-19 06:45:44,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:45:44,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:45:44,775 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:45:44,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1201970715] [2022-11-19 06:45:44,776 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 06:45:44,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:45:44,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:45:44,778 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:45:44,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aad6bb0d-cc1d-4e91-b095-0906eb75ca0f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-19 06:45:49,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:45:49,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 14541 conjuncts, 193 conjunts are in the unsatisfiable core [2022-11-19 06:45:49,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:46:07,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1170168 backedges. 255382 proven. 18145 refuted. 0 times theorem prover too weak. 896641 trivial. 0 not checked. [2022-11-19 06:46:07,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:46:40,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1170168 backedges. 255382 proven. 18145 refuted. 0 times theorem prover too weak. 896641 trivial. 0 not checked. [2022-11-19 06:46:40,931 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:46:40,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259393268] [2022-11-19 06:46:40,931 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:46:40,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201970715] [2022-11-19 06:46:40,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201970715] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:46:40,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1292967213] [2022-11-19 06:46:40,934 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-19 06:46:40,934 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:46:40,935 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:46:40,935 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:46:40,935 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:46:40,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:46:40,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:46:41,002 INFO L321 Elim1Store]: treesize reduction 95, result has 28.0 percent of original size [2022-11-19 06:46:41,003 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 39 treesize of output 63 [2022-11-19 06:46:41,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:46:41,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:46:41,076 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 06:46:41,077 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 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 06:46:41,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:46:41,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2022-11-19 06:46:41,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:46:41,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:46:41,308 INFO L321 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-11-19 06:46:41,309 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 3 case distinctions, treesize of input 418 treesize of output 394 [2022-11-19 06:46:41,399 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 28 treesize of output 24 [2022-11-19 06:46:41,447 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 28 treesize of output 24 [2022-11-19 06:46:41,542 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 24 treesize of output 20 [2022-11-19 06:46:41,605 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 28 treesize of output 24 [2022-11-19 06:46:41,657 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 28 treesize of output 24 [2022-11-19 06:46:41,721 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 28 treesize of output 24 [2022-11-19 06:46:41,784 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 142 treesize of output 120 [2022-11-19 06:46:41,830 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 28 treesize of output 24 [2022-11-19 06:46:41,870 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 28 treesize of output 24 [2022-11-19 06:46:41,918 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 28 treesize of output 24 [2022-11-19 06:46:41,978 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 142 treesize of output 120 [2022-11-19 06:46:42,027 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 28 treesize of output 24 [2022-11-19 06:46:42,075 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 28 treesize of output 24 [2022-11-19 06:46:42,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:46:42,130 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:46:42,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:46:42,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:46:42,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:46:42,176 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-19 06:46:42,177 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 3 case distinctions, treesize of input 164 treesize of output 169 [2022-11-19 06:46:42,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:46:42,220 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:46:42,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:46:42,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:46:42,281 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:46:42,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:46:42,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:46:42,319 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:46:42,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:46:42,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:46:42,380 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:46:42,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:46:42,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:46:42,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:46:42,457 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-19 06:46:42,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 144 treesize of output 163 [2022-11-19 06:46:42,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:46:42,529 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:46:42,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:46:42,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:46:42,576 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:46:42,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:46:42,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:46:42,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:46:42,620 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-19 06:46:42,621 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 3 case distinctions, treesize of input 146 treesize of output 151 [2022-11-19 06:46:42,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:46:42,660 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:46:42,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:46:42,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:46:42,762 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:46:42,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:46:42,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:46:42,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:46:42,846 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-19 06:46:42,846 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 3 case distinctions, treesize of input 174 treesize of output 179 [2022-11-19 06:46:42,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:46:42,915 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:46:42,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:46:42,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:46:42,959 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:46:42,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:46:43,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:46:43,030 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-19 06:46:43,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-11-19 06:46:43,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:46:43,074 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:46:43,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:46:43,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:46:43,118 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:46:43,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:46:43,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:46:43,183 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-19 06:46:43,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-11-19 06:46:43,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:46:43,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:46:43,324 INFO L321 Elim1Store]: treesize reduction 160, result has 35.7 percent of original size [2022-11-19 06:46:43,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 192 [2022-11-19 06:46:43,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:46:43,388 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:46:43,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:46:43,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:46:43,430 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:46:43,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:46:43,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:46:43,491 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-19 06:46:43,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-11-19 06:46:43,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:46:43,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:46:43,589 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-19 06:46:43,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2022-11-19 06:46:43,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:46:43,648 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:46:43,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-19 06:46:43,652 INFO L180 IcfgInterpreter]: Interpretation finished