./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array6_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array6_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --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 81db346fb66b40514998cf838e858b3f0793fe5c74d5812efa60193ab54d6833 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 01:01:55,766 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 01:01:55,874 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 01:01:55,880 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 01:01:55,881 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 01:01:55,911 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 01:01:55,912 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 01:01:55,912 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 01:01:55,913 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 01:01:55,914 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 01:01:55,914 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 01:01:55,915 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 01:01:55,916 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 01:01:55,916 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 01:01:55,917 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 01:01:55,917 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 01:01:55,918 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 01:01:55,918 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 01:01:55,919 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 01:01:55,919 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 01:01:55,920 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 01:01:55,920 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 01:01:55,921 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 01:01:55,922 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 01:01:55,922 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 01:01:55,922 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 01:01:55,923 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 01:01:55,923 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 01:01:55,924 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 01:01:55,924 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 01:01:55,925 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 01:01:55,925 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 01:01:55,925 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 01:01:55,926 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 01:01:55,926 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 01:01:55,927 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 01:01:55,927 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:01:55,928 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 01:01:55,928 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 01:01:55,929 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 01:01:55,929 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 01:01:55,930 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 01:01:55,930 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 01:01:55,930 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 01:01:55,931 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 01:01:55,931 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81db346fb66b40514998cf838e858b3f0793fe5c74d5812efa60193ab54d6833 [2023-11-12 01:01:56,266 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 01:01:56,302 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 01:01:56,305 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 01:01:56,307 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 01:01:56,307 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 01:01:56,310 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/array-patterns/array6_pattern.c [2023-11-12 01:01:59,612 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 01:01:59,809 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 01:01:59,810 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/sv-benchmarks/c/array-patterns/array6_pattern.c [2023-11-12 01:01:59,818 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/data/fa9e366a7/2f6048d299e34a2d91cca61724b081ee/FLAGfde728d26 [2023-11-12 01:01:59,832 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/data/fa9e366a7/2f6048d299e34a2d91cca61724b081ee [2023-11-12 01:01:59,834 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 01:01:59,836 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 01:01:59,838 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 01:01:59,838 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 01:01:59,845 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 01:01:59,846 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:01:59" (1/1) ... [2023-11-12 01:01:59,847 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c036880 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:59, skipping insertion in model container [2023-11-12 01:01:59,847 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:01:59" (1/1) ... [2023-11-12 01:01:59,874 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 01:02:00,016 WARN L240 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_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/sv-benchmarks/c/array-patterns/array6_pattern.c[1356,1369] [2023-11-12 01:02:00,048 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:02:00,057 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 01:02:00,067 WARN L240 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_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/sv-benchmarks/c/array-patterns/array6_pattern.c[1356,1369] [2023-11-12 01:02:00,078 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:02:00,093 INFO L206 MainTranslator]: Completed translation [2023-11-12 01:02:00,093 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:00 WrapperNode [2023-11-12 01:02:00,093 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 01:02:00,095 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 01:02:00,095 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 01:02:00,095 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 01:02:00,103 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:00" (1/1) ... [2023-11-12 01:02:00,110 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:00" (1/1) ... [2023-11-12 01:02:00,132 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 86 [2023-11-12 01:02:00,133 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 01:02:00,133 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 01:02:00,134 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 01:02:00,134 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 01:02:00,143 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:00" (1/1) ... [2023-11-12 01:02:00,143 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:00" (1/1) ... [2023-11-12 01:02:00,145 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:00" (1/1) ... [2023-11-12 01:02:00,145 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:00" (1/1) ... [2023-11-12 01:02:00,152 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:00" (1/1) ... [2023-11-12 01:02:00,156 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:00" (1/1) ... [2023-11-12 01:02:00,157 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:00" (1/1) ... [2023-11-12 01:02:00,158 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:00" (1/1) ... [2023-11-12 01:02:00,160 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 01:02:00,161 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 01:02:00,162 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 01:02:00,162 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 01:02:00,163 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:00" (1/1) ... [2023-11-12 01:02:00,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:02:00,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:00,202 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 01:02:00,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 01:02:00,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 01:02:00,233 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 01:02:00,234 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 01:02:00,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 01:02:00,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 01:02:00,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 01:02:00,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 01:02:00,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 01:02:00,235 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 01:02:00,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 01:02:00,310 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 01:02:00,312 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 01:02:00,508 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 01:02:00,547 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 01:02:00,547 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-12 01:02:00,550 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:02:00 BoogieIcfgContainer [2023-11-12 01:02:00,550 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 01:02:00,553 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 01:02:00,553 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 01:02:00,556 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 01:02:00,557 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 01:01:59" (1/3) ... [2023-11-12 01:02:00,558 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3984956b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:02:00, skipping insertion in model container [2023-11-12 01:02:00,558 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:00" (2/3) ... [2023-11-12 01:02:00,558 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3984956b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:02:00, skipping insertion in model container [2023-11-12 01:02:00,559 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:02:00" (3/3) ... [2023-11-12 01:02:00,560 INFO L112 eAbstractionObserver]: Analyzing ICFG array6_pattern.c [2023-11-12 01:02:00,581 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 01:02:00,582 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 01:02:00,628 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 01:02:00,634 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=LoopHeads, 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;@3e137e77, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 01:02:00,634 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 01:02:00,638 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 01:02:00,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-12 01:02:00,644 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:00,645 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:00,645 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:00,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:00,650 INFO L85 PathProgramCache]: Analyzing trace with hash -939400662, now seen corresponding path program 1 times [2023-11-12 01:02:00,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:00,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918980013] [2023-11-12 01:02:00,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:00,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:00,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:00,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:00,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:00,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918980013] [2023-11-12 01:02:00,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918980013] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:00,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:00,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 01:02:00,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498512709] [2023-11-12 01:02:00,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:00,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 01:02:00,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:00,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 01:02:00,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 01:02:00,954 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 01:02:00,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:00,998 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2023-11-12 01:02:01,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 01:02:01,001 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-11-12 01:02:01,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:01,009 INFO L225 Difference]: With dead ends: 24 [2023-11-12 01:02:01,010 INFO L226 Difference]: Without dead ends: 15 [2023-11-12 01:02:01,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 01:02:01,020 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:01,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 01:02:01,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-12 01:02:01,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-12 01:02:01,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 01:02:01,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2023-11-12 01:02:01,082 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 11 [2023-11-12 01:02:01,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:01,083 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2023-11-12 01:02:01,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 01:02:01,084 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2023-11-12 01:02:01,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-12 01:02:01,085 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:01,085 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:01,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 01:02:01,086 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:01,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:01,087 INFO L85 PathProgramCache]: Analyzing trace with hash 2125331809, now seen corresponding path program 1 times [2023-11-12 01:02:01,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:01,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678295818] [2023-11-12 01:02:01,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:01,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:01,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:01,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 01:02:01,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:01,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678295818] [2023-11-12 01:02:01,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678295818] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:01,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:01,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 01:02:01,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299878168] [2023-11-12 01:02:01,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:01,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 01:02:01,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:01,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 01:02:01,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:02:01,315 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 01:02:01,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:01,354 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2023-11-12 01:02:01,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 01:02:01,355 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2023-11-12 01:02:01,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:01,356 INFO L225 Difference]: With dead ends: 19 [2023-11-12 01:02:01,356 INFO L226 Difference]: Without dead ends: 16 [2023-11-12 01:02:01,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:02:01,358 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:01,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 28 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 01:02:01,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-12 01:02:01,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-11-12 01:02:01,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 01:02:01,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2023-11-12 01:02:01,366 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 16 [2023-11-12 01:02:01,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:01,366 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2023-11-12 01:02:01,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 01:02:01,367 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2023-11-12 01:02:01,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-12 01:02:01,368 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:01,368 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:01,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 01:02:01,369 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:01,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:01,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1460511396, now seen corresponding path program 1 times [2023-11-12 01:02:01,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:01,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503458730] [2023-11-12 01:02:01,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:01,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:01,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:01,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 01:02:01,582 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:01,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503458730] [2023-11-12 01:02:01,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503458730] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:01,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:01,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 01:02:01,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438011603] [2023-11-12 01:02:01,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:01,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 01:02:01,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:01,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 01:02:01,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:02:01,589 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 01:02:01,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:01,659 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2023-11-12 01:02:01,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 01:02:01,661 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2023-11-12 01:02:01,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:01,663 INFO L225 Difference]: With dead ends: 29 [2023-11-12 01:02:01,663 INFO L226 Difference]: Without dead ends: 17 [2023-11-12 01:02:01,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:02:01,667 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:01,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 29 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:02:01,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-12 01:02:01,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-12 01:02:01,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 01:02:01,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2023-11-12 01:02:01,685 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 17 [2023-11-12 01:02:01,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:01,686 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2023-11-12 01:02:01,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 01:02:01,687 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2023-11-12 01:02:01,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-12 01:02:01,688 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:01,689 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:01,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 01:02:01,689 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:01,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:01,696 INFO L85 PathProgramCache]: Analyzing trace with hash 927643208, now seen corresponding path program 1 times [2023-11-12 01:02:01,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:01,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231461123] [2023-11-12 01:02:01,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:01,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:01,733 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:02:01,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1035214721] [2023-11-12 01:02:01,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:01,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:01,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:01,752 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:01,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 01:02:01,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:01,876 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 01:02:01,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:02:01,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 01:02:01,991 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:02:02,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 01:02:02,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:02,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231461123] [2023-11-12 01:02:02,137 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:02:02,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035214721] [2023-11-12 01:02:02,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035214721] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:02:02,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [323789407] [2023-11-12 01:02:02,168 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-12 01:02:02,168 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:02:02,172 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:02:02,178 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:02:02,178 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:02:03,162 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-11-12 01:02:03,164 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:02:04,077 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '312#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 3 ~ARR_SIZE~0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (<= 2 |ULTIMATE.start_main_~#array1~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 2 |ULTIMATE.start_main_~#array2~0#1.base|) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= |ULTIMATE.start_main_~index~0#1| 32765) (<= ~ARR_SIZE~0 32767) (<= 1 |ULTIMATE.start_main_~index~0#1|))' at error location [2023-11-12 01:02:04,077 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:02:04,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 01:02:04,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-11-12 01:02:04,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850926981] [2023-11-12 01:02:04,080 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 01:02:04,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 01:02:04,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:04,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 01:02:04,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2023-11-12 01:02:04,088 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 01:02:04,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:04,376 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2023-11-12 01:02:04,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-12 01:02:04,377 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 18 [2023-11-12 01:02:04,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:04,380 INFO L225 Difference]: With dead ends: 49 [2023-11-12 01:02:04,381 INFO L226 Difference]: Without dead ends: 29 [2023-11-12 01:02:04,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2023-11-12 01:02:04,385 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 35 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:04,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 46 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:02:04,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-12 01:02:04,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2023-11-12 01:02:04,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 01:02:04,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2023-11-12 01:02:04,403 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 18 [2023-11-12 01:02:04,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:04,404 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2023-11-12 01:02:04,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 01:02:04,404 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2023-11-12 01:02:04,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 01:02:04,405 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:04,405 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:04,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 01:02:04,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:04,622 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:04,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:04,622 INFO L85 PathProgramCache]: Analyzing trace with hash 603378120, now seen corresponding path program 2 times [2023-11-12 01:02:04,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:04,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276050169] [2023-11-12 01:02:04,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:04,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:04,642 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:02:04,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1274931096] [2023-11-12 01:02:04,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 01:02:04,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:04,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:04,644 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:04,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 01:02:04,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 01:02:04,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:02:04,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 01:02:04,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:02:04,799 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 01:02:04,799 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:02:04,892 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 01:02:04,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:04,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276050169] [2023-11-12 01:02:04,893 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:02:04,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274931096] [2023-11-12 01:02:04,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274931096] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:02:04,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [291527921] [2023-11-12 01:02:04,898 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-12 01:02:04,899 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:02:04,900 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:02:04,900 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:02:04,900 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:02:05,504 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-11-12 01:02:05,505 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:02:06,300 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '567#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 3 ~ARR_SIZE~0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (<= 2 |ULTIMATE.start_main_~#array1~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 2 |ULTIMATE.start_main_~#array2~0#1.base|) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= |ULTIMATE.start_main_~index~0#1| 32765) (<= ~ARR_SIZE~0 32767) (<= 1 |ULTIMATE.start_main_~index~0#1|))' at error location [2023-11-12 01:02:06,301 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:02:06,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 01:02:06,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-12 01:02:06,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982224158] [2023-11-12 01:02:06,301 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 01:02:06,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 01:02:06,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:06,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 01:02:06,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2023-11-12 01:02:06,303 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 10 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-12 01:02:06,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:06,397 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2023-11-12 01:02:06,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 01:02:06,397 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 10 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2023-11-12 01:02:06,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:06,399 INFO L225 Difference]: With dead ends: 28 [2023-11-12 01:02:06,399 INFO L226 Difference]: Without dead ends: 25 [2023-11-12 01:02:06,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2023-11-12 01:02:06,400 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:06,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 34 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:02:06,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-12 01:02:06,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-11-12 01:02:06,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 01:02:06,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2023-11-12 01:02:06,408 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 20 [2023-11-12 01:02:06,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:06,409 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2023-11-12 01:02:06,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 10 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-12 01:02:06,409 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2023-11-12 01:02:06,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-12 01:02:06,410 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:06,410 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:06,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-12 01:02:06,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:06,616 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:06,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:06,617 INFO L85 PathProgramCache]: Analyzing trace with hash 17300584, now seen corresponding path program 3 times [2023-11-12 01:02:06,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:06,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847390886] [2023-11-12 01:02:06,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:06,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:06,633 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:02:06,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [695300376] [2023-11-12 01:02:06,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 01:02:06,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:06,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:06,635 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:06,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 01:02:06,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 01:02:06,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:02:06,801 WARN L260 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 73 conjunts are in the unsatisfiable core [2023-11-12 01:02:06,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:02:06,860 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-12 01:02:06,926 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-12 01:02:07,003 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 30 [2023-11-12 01:02:07,084 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 49 [2023-11-12 01:02:07,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 01:02:07,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 01:02:07,626 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 01:02:07,632 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 01:02:07,635 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 01:02:07,763 INFO L322 Elim1Store]: treesize reduction 282, result has 7.5 percent of original size [2023-11-12 01:02:07,764 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 3 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 93 case distinctions, treesize of input 166 treesize of output 181 [2023-11-12 01:02:08,544 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:08,545 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:02:09,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:09,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847390886] [2023-11-12 01:02:09,313 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:02:09,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695300376] [2023-11-12 01:02:09,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695300376] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:02:09,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [694426860] [2023-11-12 01:02:09,317 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-12 01:02:09,317 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:02:09,317 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:02:09,318 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:02:09,318 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:02:09,744 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-11-12 01:02:09,745 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:02:11,114 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '784#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 3 ~ARR_SIZE~0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (<= 2 |ULTIMATE.start_main_~#array1~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 2 |ULTIMATE.start_main_~#array2~0#1.base|) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= |ULTIMATE.start_main_~index~0#1| 32765) (<= ~ARR_SIZE~0 32767) (<= 1 |ULTIMATE.start_main_~index~0#1|))' at error location [2023-11-12 01:02:11,115 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:02:11,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:02:11,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-11-12 01:02:11,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937389313] [2023-11-12 01:02:11,115 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-12 01:02:11,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-12 01:02:11,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:11,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-12 01:02:11,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2023-11-12 01:02:11,119 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 18 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 01:02:12,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:12,075 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2023-11-12 01:02:12,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-12 01:02:12,077 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-11-12 01:02:12,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:12,078 INFO L225 Difference]: With dead ends: 45 [2023-11-12 01:02:12,078 INFO L226 Difference]: Without dead ends: 42 [2023-11-12 01:02:12,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=221, Invalid=1501, Unknown=0, NotChecked=0, Total=1722 [2023-11-12 01:02:12,080 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 31 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:12,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 73 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 01:02:12,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-12 01:02:12,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 32. [2023-11-12 01:02:12,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 01:02:12,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2023-11-12 01:02:12,093 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 22 [2023-11-12 01:02:12,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:12,094 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2023-11-12 01:02:12,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 01:02:12,094 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2023-11-12 01:02:12,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-12 01:02:12,095 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:12,095 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:12,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 01:02:12,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:12,302 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:12,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:12,302 INFO L85 PathProgramCache]: Analyzing trace with hash 536052861, now seen corresponding path program 4 times [2023-11-12 01:02:12,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:12,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121769585] [2023-11-12 01:02:12,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:12,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:12,327 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:02:12,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1288105988] [2023-11-12 01:02:12,331 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 01:02:12,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:12,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:12,332 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:12,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 01:02:12,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:12,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 01:02:12,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:02:12,546 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:12,547 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:02:12,641 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 01:02:12,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:12,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121769585] [2023-11-12 01:02:12,641 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:02:12,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288105988] [2023-11-12 01:02:12,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288105988] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:02:12,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [918727829] [2023-11-12 01:02:12,647 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-12 01:02:12,648 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:02:12,648 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:02:12,648 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:02:12,648 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:02:13,077 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-11-12 01:02:13,078 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:02:13,905 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1074#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 3 ~ARR_SIZE~0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (<= 2 |ULTIMATE.start_main_~#array1~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 2 |ULTIMATE.start_main_~#array2~0#1.base|) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= |ULTIMATE.start_main_~index~0#1| 32765) (<= ~ARR_SIZE~0 32767) (<= 1 |ULTIMATE.start_main_~index~0#1|))' at error location [2023-11-12 01:02:13,905 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:02:13,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 01:02:13,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-11-12 01:02:13,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214890992] [2023-11-12 01:02:13,906 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 01:02:13,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-12 01:02:13,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:13,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-12 01:02:13,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2023-11-12 01:02:13,908 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 01:02:14,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:14,103 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2023-11-12 01:02:14,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-12 01:02:14,104 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2023-11-12 01:02:14,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:14,105 INFO L225 Difference]: With dead ends: 57 [2023-11-12 01:02:14,106 INFO L226 Difference]: Without dead ends: 48 [2023-11-12 01:02:14,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=164, Invalid=828, Unknown=0, NotChecked=0, Total=992 [2023-11-12 01:02:14,107 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 53 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:14,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 60 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:02:14,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-12 01:02:14,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2023-11-12 01:02:14,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-12 01:02:14,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2023-11-12 01:02:14,126 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 23 [2023-11-12 01:02:14,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:14,126 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2023-11-12 01:02:14,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 01:02:14,127 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2023-11-12 01:02:14,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-12 01:02:14,128 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:14,128 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:14,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 01:02:14,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:14,335 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:14,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:14,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1121554244, now seen corresponding path program 5 times [2023-11-12 01:02:14,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:14,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635779319] [2023-11-12 01:02:14,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:14,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:14,351 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:02:14,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1601416094] [2023-11-12 01:02:14,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 01:02:14,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:14,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:14,353 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:14,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 01:02:14,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-12 01:02:14,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:02:14,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 01:02:14,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:02:14,626 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:14,626 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:02:14,721 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 01:02:14,721 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:14,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635779319] [2023-11-12 01:02:14,722 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:02:14,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601416094] [2023-11-12 01:02:14,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601416094] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:02:14,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1149575747] [2023-11-12 01:02:14,727 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-12 01:02:14,727 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:02:14,727 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:02:14,727 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:02:14,728 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:02:15,234 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-11-12 01:02:15,236 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:02:16,078 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1395#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 3 ~ARR_SIZE~0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (<= 2 |ULTIMATE.start_main_~#array1~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 2 |ULTIMATE.start_main_~#array2~0#1.base|) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= |ULTIMATE.start_main_~index~0#1| 32765) (<= ~ARR_SIZE~0 32767) (<= 1 |ULTIMATE.start_main_~index~0#1|))' at error location [2023-11-12 01:02:16,078 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:02:16,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 01:02:16,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-11-12 01:02:16,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942219103] [2023-11-12 01:02:16,078 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 01:02:16,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-12 01:02:16,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:16,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-12 01:02:16,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2023-11-12 01:02:16,081 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 01:02:16,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:16,278 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2023-11-12 01:02:16,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 01:02:16,279 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2023-11-12 01:02:16,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:16,281 INFO L225 Difference]: With dead ends: 48 [2023-11-12 01:02:16,281 INFO L226 Difference]: Without dead ends: 45 [2023-11-12 01:02:16,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2023-11-12 01:02:16,283 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 30 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:16,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 54 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:02:16,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-12 01:02:16,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2023-11-12 01:02:16,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-12 01:02:16,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2023-11-12 01:02:16,301 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 23 [2023-11-12 01:02:16,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:16,302 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2023-11-12 01:02:16,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 01:02:16,302 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2023-11-12 01:02:16,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-12 01:02:16,304 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:16,304 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:16,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 01:02:16,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:16,513 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:16,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:16,513 INFO L85 PathProgramCache]: Analyzing trace with hash 408177953, now seen corresponding path program 6 times [2023-11-12 01:02:16,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:16,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462628646] [2023-11-12 01:02:16,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:16,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:16,530 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:02:16,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1244416543] [2023-11-12 01:02:16,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 01:02:16,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:16,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:16,532 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:16,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 01:02:16,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 01:02:16,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:02:16,805 WARN L260 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 90 conjunts are in the unsatisfiable core [2023-11-12 01:02:16,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:02:16,834 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-12 01:02:16,880 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-12 01:02:16,976 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 37 [2023-11-12 01:02:17,099 INFO L322 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2023-11-12 01:02:17,100 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 58 treesize of output 59 [2023-11-12 01:02:17,216 INFO L322 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2023-11-12 01:02:17,216 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 74 treesize of output 81 [2023-11-12 01:02:17,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 01:02:17,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 01:02:17,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 01:02:17,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 01:02:17,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 01:02:17,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 01:02:18,510 INFO L322 Elim1Store]: treesize reduction 933, result has 9.4 percent of original size [2023-11-12 01:02:18,511 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 20 select indices, 20 select index equivalence classes, 15 disjoint index pairs (out of 190 index pairs), introduced 20 new quantified variables, introduced 199 case distinctions, treesize of input 212 treesize of output 268 [2023-11-12 01:02:19,618 INFO L322 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2023-11-12 01:02:19,618 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 121 treesize of output 61 [2023-11-12 01:02:19,663 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:19,663 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:02:20,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:20,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462628646] [2023-11-12 01:02:20,555 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:02:20,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244416543] [2023-11-12 01:02:20,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244416543] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:02:20,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1730750536] [2023-11-12 01:02:20,557 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-12 01:02:20,557 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:02:20,558 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:02:20,558 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:02:20,558 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:02:20,932 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-11-12 01:02:20,933 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:02:22,178 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1687#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 3 ~ARR_SIZE~0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (<= 2 |ULTIMATE.start_main_~#array1~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 2 |ULTIMATE.start_main_~#array2~0#1.base|) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= |ULTIMATE.start_main_~index~0#1| 32765) (<= ~ARR_SIZE~0 32767) (<= 1 |ULTIMATE.start_main_~index~0#1|))' at error location [2023-11-12 01:02:22,179 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:02:22,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:02:22,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-11-12 01:02:22,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971798608] [2023-11-12 01:02:22,179 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-12 01:02:22,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-12 01:02:22,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:22,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-12 01:02:22,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1368, Unknown=0, NotChecked=0, Total=1560 [2023-11-12 01:02:22,182 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 20 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 01:02:23,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:23,320 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2023-11-12 01:02:23,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-12 01:02:23,321 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2023-11-12 01:02:23,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:23,322 INFO L225 Difference]: With dead ends: 61 [2023-11-12 01:02:23,323 INFO L226 Difference]: Without dead ends: 58 [2023-11-12 01:02:23,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=252, Invalid=1728, Unknown=0, NotChecked=0, Total=1980 [2023-11-12 01:02:23,325 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 35 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:23,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 101 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 01:02:23,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-12 01:02:23,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2023-11-12 01:02:23,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-12 01:02:23,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2023-11-12 01:02:23,365 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 24 [2023-11-12 01:02:23,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:23,366 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2023-11-12 01:02:23,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 01:02:23,366 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2023-11-12 01:02:23,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-12 01:02:23,367 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:23,368 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:23,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-12 01:02:23,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:23,575 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:23,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:23,576 INFO L85 PathProgramCache]: Analyzing trace with hash -231650588, now seen corresponding path program 7 times [2023-11-12 01:02:23,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:23,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407779311] [2023-11-12 01:02:23,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:23,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:23,600 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:02:23,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1401972077] [2023-11-12 01:02:23,601 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 01:02:23,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:23,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:23,603 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:23,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 01:02:23,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:23,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 01:02:23,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:02:23,850 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:23,851 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:02:23,969 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 01:02:23,970 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:23,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407779311] [2023-11-12 01:02:23,970 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:02:23,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401972077] [2023-11-12 01:02:23,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401972077] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:02:23,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [606732290] [2023-11-12 01:02:23,972 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-12 01:02:23,973 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:02:23,973 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:02:23,974 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:02:23,974 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:02:24,363 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-11-12 01:02:24,364 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:02:25,267 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2049#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 3 ~ARR_SIZE~0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (<= 2 |ULTIMATE.start_main_~#array1~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 2 |ULTIMATE.start_main_~#array2~0#1.base|) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= |ULTIMATE.start_main_~index~0#1| 32765) (<= ~ARR_SIZE~0 32767) (<= 1 |ULTIMATE.start_main_~index~0#1|))' at error location [2023-11-12 01:02:25,267 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:02:25,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 01:02:25,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2023-11-12 01:02:25,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737838869] [2023-11-12 01:02:25,268 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 01:02:25,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-12 01:02:25,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:25,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-12 01:02:25,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2023-11-12 01:02:25,270 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 01:02:25,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:25,630 INFO L93 Difference]: Finished difference Result 81 states and 87 transitions. [2023-11-12 01:02:25,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-12 01:02:25,630 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2023-11-12 01:02:25,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:25,631 INFO L225 Difference]: With dead ends: 81 [2023-11-12 01:02:25,631 INFO L226 Difference]: Without dead ends: 71 [2023-11-12 01:02:25,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=278, Invalid=1362, Unknown=0, NotChecked=0, Total=1640 [2023-11-12 01:02:25,633 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 54 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:25,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 68 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:02:25,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-12 01:02:25,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 57. [2023-11-12 01:02:25,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 44 states have internal predecessors, (51), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-12 01:02:25,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2023-11-12 01:02:25,662 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 25 [2023-11-12 01:02:25,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:25,662 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2023-11-12 01:02:25,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 01:02:25,662 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2023-11-12 01:02:25,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-12 01:02:25,663 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:25,663 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:25,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 01:02:25,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 01:02:25,869 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:25,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:25,869 INFO L85 PathProgramCache]: Analyzing trace with hash 739023101, now seen corresponding path program 8 times [2023-11-12 01:02:25,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:25,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832529770] [2023-11-12 01:02:25,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:25,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:25,885 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:02:25,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1481232396] [2023-11-12 01:02:25,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 01:02:25,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:25,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:25,887 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:25,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 01:02:26,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-12 01:02:26,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:02:26,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 01:02:26,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:02:26,204 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:26,204 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:02:26,318 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 01:02:26,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:26,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832529770] [2023-11-12 01:02:26,319 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:02:26,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481232396] [2023-11-12 01:02:26,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481232396] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:02:26,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [572160292] [2023-11-12 01:02:26,325 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-12 01:02:26,325 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:02:26,325 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:02:26,325 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:02:26,325 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:02:26,693 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-11-12 01:02:26,694 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:02:27,379 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2460#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 3 ~ARR_SIZE~0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (<= 2 |ULTIMATE.start_main_~#array1~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 2 |ULTIMATE.start_main_~#array2~0#1.base|) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= |ULTIMATE.start_main_~index~0#1| 32765) (<= ~ARR_SIZE~0 32767) (<= 1 |ULTIMATE.start_main_~index~0#1|))' at error location [2023-11-12 01:02:27,379 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:02:27,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 01:02:27,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2023-11-12 01:02:27,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128183955] [2023-11-12 01:02:27,380 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 01:02:27,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-12 01:02:27,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:27,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-12 01:02:27,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2023-11-12 01:02:27,382 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 01:02:27,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:27,625 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2023-11-12 01:02:27,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 01:02:27,625 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2023-11-12 01:02:27,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:27,626 INFO L225 Difference]: With dead ends: 71 [2023-11-12 01:02:27,626 INFO L226 Difference]: Without dead ends: 68 [2023-11-12 01:02:27,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=216, Invalid=1044, Unknown=0, NotChecked=0, Total=1260 [2023-11-12 01:02:27,628 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 30 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:27,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 121 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:02:27,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-11-12 01:02:27,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2023-11-12 01:02:27,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-12 01:02:27,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2023-11-12 01:02:27,656 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 25 [2023-11-12 01:02:27,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:27,656 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2023-11-12 01:02:27,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 01:02:27,657 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2023-11-12 01:02:27,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-12 01:02:27,658 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:27,658 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:27,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 01:02:27,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:27,860 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:27,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:27,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1434614408, now seen corresponding path program 9 times [2023-11-12 01:02:27,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:27,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585792827] [2023-11-12 01:02:27,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:27,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:27,890 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:02:27,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1308236367] [2023-11-12 01:02:27,890 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 01:02:27,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:27,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:27,891 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:27,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 01:02:28,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 01:02:28,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:02:28,298 WARN L260 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 101 conjunts are in the unsatisfiable core [2023-11-12 01:02:28,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:02:28,338 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-12 01:02:28,379 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-12 01:02:28,452 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 37 [2023-11-12 01:02:28,553 INFO L322 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2023-11-12 01:02:28,553 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 58 treesize of output 59 [2023-11-12 01:02:28,685 INFO L322 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2023-11-12 01:02:28,686 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 74 treesize of output 81 [2023-11-12 01:02:28,822 INFO L322 Elim1Store]: treesize reduction 51, result has 12.1 percent of original size [2023-11-12 01:02:28,823 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 90 treesize of output 103 [2023-11-12 01:02:29,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 01:02:29,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 01:02:29,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 01:02:29,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 01:02:29,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 01:02:29,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 01:02:30,828 INFO L322 Elim1Store]: treesize reduction 1324, result has 10.1 percent of original size [2023-11-12 01:02:30,829 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 24 select indices, 24 select index equivalence classes, 19 disjoint index pairs (out of 276 index pairs), introduced 24 new quantified variables, introduced 289 case distinctions, treesize of input 244 treesize of output 336 [2023-11-12 01:02:33,037 INFO L322 Elim1Store]: treesize reduction 37, result has 9.8 percent of original size [2023-11-12 01:02:33,038 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 198 treesize of output 98 [2023-11-12 01:02:33,086 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:33,086 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:02:36,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:36,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585792827] [2023-11-12 01:02:36,455 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:02:36,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308236367] [2023-11-12 01:02:36,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308236367] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:02:36,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [928072260] [2023-11-12 01:02:36,458 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-12 01:02:36,458 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:02:36,458 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:02:36,458 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:02:36,458 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:02:36,770 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-11-12 01:02:36,771 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:02:38,201 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2827#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 3 ~ARR_SIZE~0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (<= 2 |ULTIMATE.start_main_~#array1~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 2 |ULTIMATE.start_main_~#array2~0#1.base|) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= |ULTIMATE.start_main_~index~0#1| 32765) (<= ~ARR_SIZE~0 32767) (<= 1 |ULTIMATE.start_main_~index~0#1|))' at error location [2023-11-12 01:02:38,201 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:02:38,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:02:38,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-11-12 01:02:38,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921711915] [2023-11-12 01:02:38,202 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-12 01:02:38,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-12 01:02:38,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:38,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-12 01:02:38,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1587, Unknown=1, NotChecked=0, Total=1806 [2023-11-12 01:02:38,204 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand has 22 states, 20 states have (on average 1.1) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 01:02:39,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:39,789 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2023-11-12 01:02:39,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-12 01:02:39,790 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.1) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2023-11-12 01:02:39,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:39,791 INFO L225 Difference]: With dead ends: 79 [2023-11-12 01:02:39,791 INFO L226 Difference]: Without dead ends: 76 [2023-11-12 01:02:39,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=280, Invalid=1975, Unknown=1, NotChecked=0, Total=2256 [2023-11-12 01:02:39,793 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 37 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:39,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 140 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 01:02:39,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-11-12 01:02:39,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2023-11-12 01:02:39,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 52 states have internal predecessors, (61), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-12 01:02:39,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2023-11-12 01:02:39,823 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 26 [2023-11-12 01:02:39,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:39,823 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2023-11-12 01:02:39,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.1) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 01:02:39,824 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2023-11-12 01:02:39,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-12 01:02:39,825 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:39,825 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:39,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 01:02:40,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-12 01:02:40,027 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:40,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:40,028 INFO L85 PathProgramCache]: Analyzing trace with hash -2032349798, now seen corresponding path program 1 times [2023-11-12 01:02:40,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:40,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310886342] [2023-11-12 01:02:40,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:40,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:40,041 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:02:40,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1041107828] [2023-11-12 01:02:40,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:40,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:40,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:40,043 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:40,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 01:02:40,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:40,245 WARN L260 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 82 conjunts are in the unsatisfiable core [2023-11-12 01:02:40,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:02:40,271 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-12 01:02:40,335 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-12 01:02:40,380 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 28 [2023-11-12 01:02:40,476 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 47 [2023-11-12 01:02:40,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 01:02:40,961 INFO L322 Elim1Store]: treesize reduction 125, result has 8.1 percent of original size [2023-11-12 01:02:40,968 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 4 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 120 treesize of output 111 [2023-11-12 01:02:41,014 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 01:02:41,029 INFO L322 Elim1Store]: treesize reduction 81, result has 1.2 percent of original size [2023-11-12 01:02:41,030 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 96 treesize of output 83 [2023-11-12 01:02:41,676 INFO L322 Elim1Store]: treesize reduction 222, result has 6.3 percent of original size [2023-11-12 01:02:41,677 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 3 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 68 case distinctions, treesize of input 132 treesize of output 140 [2023-11-12 01:02:42,459 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:42,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:02:43,134 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:43,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310886342] [2023-11-12 01:02:43,135 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:02:43,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041107828] [2023-11-12 01:02:43,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041107828] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:02:43,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1103515126] [2023-11-12 01:02:43,137 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-12 01:02:43,137 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:02:43,137 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:02:43,137 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:02:43,137 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:02:43,556 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-11-12 01:02:43,559 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:02:44,909 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3221#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 3 ~ARR_SIZE~0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (<= 2 |ULTIMATE.start_main_~#array1~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 2 |ULTIMATE.start_main_~#array2~0#1.base|) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= |ULTIMATE.start_main_~index~0#1| 32765) (<= ~ARR_SIZE~0 32767) (<= 1 |ULTIMATE.start_main_~index~0#1|))' at error location [2023-11-12 01:02:44,909 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:02:44,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:02:44,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-11-12 01:02:44,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434302002] [2023-11-12 01:02:44,910 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-12 01:02:44,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-12 01:02:44,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:44,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-12 01:02:44,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1474, Unknown=0, NotChecked=0, Total=1640 [2023-11-12 01:02:44,913 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand has 22 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 01:02:46,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:46,279 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2023-11-12 01:02:46,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-12 01:02:46,280 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2023-11-12 01:02:46,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:46,281 INFO L225 Difference]: With dead ends: 75 [2023-11-12 01:02:46,281 INFO L226 Difference]: Without dead ends: 55 [2023-11-12 01:02:46,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=300, Invalid=2250, Unknown=0, NotChecked=0, Total=2550 [2023-11-12 01:02:46,283 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:46,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 112 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 01:02:46,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-12 01:02:46,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2023-11-12 01:02:46,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 43 states have internal predecessors, (50), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-12 01:02:46,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2023-11-12 01:02:46,309 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 28 [2023-11-12 01:02:46,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:46,309 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2023-11-12 01:02:46,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 01:02:46,309 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2023-11-12 01:02:46,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-12 01:02:46,310 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:46,311 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:46,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 01:02:46,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:46,516 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:46,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:46,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1523108445, now seen corresponding path program 10 times [2023-11-12 01:02:46,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:46,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513947099] [2023-11-12 01:02:46,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:46,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:46,531 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:02:46,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [21441930] [2023-11-12 01:02:46,532 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 01:02:46,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:46,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:46,533 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:46,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 01:02:46,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:46,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-12 01:02:46,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:02:46,806 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 23 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:46,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:02:46,940 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 01:02:46,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:46,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513947099] [2023-11-12 01:02:46,940 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:02:46,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21441930] [2023-11-12 01:02:46,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21441930] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:02:46,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1802346702] [2023-11-12 01:02:46,942 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-12 01:02:46,942 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:02:46,943 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:02:46,943 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:02:46,943 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:02:47,256 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-11-12 01:02:47,258 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:02:48,087 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3636#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 3 ~ARR_SIZE~0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (<= 2 |ULTIMATE.start_main_~#array1~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 2 |ULTIMATE.start_main_~#array2~0#1.base|) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= |ULTIMATE.start_main_~index~0#1| 32765) (<= ~ARR_SIZE~0 32767) (<= 1 |ULTIMATE.start_main_~index~0#1|))' at error location [2023-11-12 01:02:48,088 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:02:48,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 01:02:48,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2023-11-12 01:02:48,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934304965] [2023-11-12 01:02:48,088 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 01:02:48,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-12 01:02:48,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:48,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-12 01:02:48,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=859, Unknown=0, NotChecked=0, Total=1056 [2023-11-12 01:02:48,090 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 01:02:48,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:48,455 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2023-11-12 01:02:48,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-12 01:02:48,456 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-11-12 01:02:48,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:48,457 INFO L225 Difference]: With dead ends: 86 [2023-11-12 01:02:48,457 INFO L226 Difference]: Without dead ends: 75 [2023-11-12 01:02:48,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=378, Invalid=1692, Unknown=0, NotChecked=0, Total=2070 [2023-11-12 01:02:48,458 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 89 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:48,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 100 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:02:48,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-12 01:02:48,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 60. [2023-11-12 01:02:48,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-12 01:02:48,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2023-11-12 01:02:48,493 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 27 [2023-11-12 01:02:48,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:48,493 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2023-11-12 01:02:48,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 01:02:48,493 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2023-11-12 01:02:48,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-12 01:02:48,494 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:48,494 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:48,500 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-12 01:02:48,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:48,700 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:48,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:48,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1549221732, now seen corresponding path program 11 times [2023-11-12 01:02:48,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:48,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014122] [2023-11-12 01:02:48,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:48,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:48,722 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:02:48,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [419931374] [2023-11-12 01:02:48,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 01:02:48,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:48,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:48,724 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:48,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 01:02:48,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-12 01:02:48,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:02:48,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-12 01:02:48,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:02:49,118 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 17 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:49,118 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:02:49,265 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 01:02:49,265 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:49,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014122] [2023-11-12 01:02:49,265 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:02:49,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419931374] [2023-11-12 01:02:49,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419931374] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:02:49,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1281192177] [2023-11-12 01:02:49,267 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-12 01:02:49,267 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:02:49,268 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:02:49,268 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:02:49,268 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:02:49,555 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-11-12 01:02:49,556 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:02:50,269 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4082#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 3 ~ARR_SIZE~0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (<= 2 |ULTIMATE.start_main_~#array1~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 2 |ULTIMATE.start_main_~#array2~0#1.base|) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= |ULTIMATE.start_main_~index~0#1| 32765) (<= ~ARR_SIZE~0 32767) (<= 1 |ULTIMATE.start_main_~index~0#1|))' at error location [2023-11-12 01:02:50,269 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:02:50,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 01:02:50,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2023-11-12 01:02:50,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126841136] [2023-11-12 01:02:50,270 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 01:02:50,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-12 01:02:50,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:50,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-12 01:02:50,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=875, Unknown=0, NotChecked=0, Total=1056 [2023-11-12 01:02:50,272 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 01:02:50,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:50,560 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2023-11-12 01:02:50,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-12 01:02:50,561 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-11-12 01:02:50,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:50,562 INFO L225 Difference]: With dead ends: 75 [2023-11-12 01:02:50,562 INFO L226 Difference]: Without dead ends: 72 [2023-11-12 01:02:50,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=272, Invalid=1288, Unknown=0, NotChecked=0, Total=1560 [2023-11-12 01:02:50,564 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 54 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:50,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 84 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:02:50,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-12 01:02:50,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 61. [2023-11-12 01:02:50,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 states have internal predecessors, (55), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-12 01:02:50,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2023-11-12 01:02:50,600 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 27 [2023-11-12 01:02:50,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:50,601 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2023-11-12 01:02:50,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 01:02:50,601 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2023-11-12 01:02:50,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-12 01:02:50,602 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:50,602 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:50,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-12 01:02:50,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:50,810 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:50,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:50,810 INFO L85 PathProgramCache]: Analyzing trace with hash 780968193, now seen corresponding path program 12 times [2023-11-12 01:02:50,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:50,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769976432] [2023-11-12 01:02:50,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:50,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:50,826 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:02:50,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1321646516] [2023-11-12 01:02:50,826 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 01:02:50,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:50,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:50,827 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:50,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ec5d43-2fdf-49df-ac2b-dd0e98729d36/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-12 01:02:51,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 01:02:51,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:02:51,227 WARN L260 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 114 conjunts are in the unsatisfiable core [2023-11-12 01:02:51,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:02:51,259 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-12 01:02:51,307 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-12 01:02:51,363 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 37 [2023-11-12 01:02:51,454 INFO L322 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2023-11-12 01:02:51,455 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 58 treesize of output 59 [2023-11-12 01:02:51,561 INFO L322 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2023-11-12 01:02:51,561 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 74 treesize of output 81 [2023-11-12 01:02:51,730 INFO L322 Elim1Store]: treesize reduction 51, result has 12.1 percent of original size [2023-11-12 01:02:51,731 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 90 treesize of output 103 [2023-11-12 01:02:51,911 INFO L322 Elim1Store]: treesize reduction 59, result has 10.6 percent of original size [2023-11-12 01:02:51,911 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 16 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 46 case distinctions, treesize of input 106 treesize of output 125 [2023-11-12 01:02:52,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 01:02:52,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 01:02:52,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 01:02:52,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 01:02:52,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 01:02:52,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 01:02:54,417 INFO L322 Elim1Store]: treesize reduction 1728, result has 9.8 percent of original size [2023-11-12 01:02:54,418 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 28 select indices, 28 select index equivalence classes, 24 disjoint index pairs (out of 378 index pairs), introduced 28 new quantified variables, introduced 395 case distinctions, treesize of input 276 treesize of output 391