./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array29_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/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_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array29_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/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_6bd318f7-05c8-4463-824a-4b8402d20ba1/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 c79b0cfbfa84c2390344382edf3f60a855c5e1f87aaed3ee77c2dd6c5f017188 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 01:02:32,556 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 01:02:32,682 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 01:02:32,695 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 01:02:32,695 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 01:02:32,734 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 01:02:32,735 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 01:02:32,735 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 01:02:32,736 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 01:02:32,737 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 01:02:32,738 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 01:02:32,738 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 01:02:32,739 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 01:02:32,739 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 01:02:32,740 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 01:02:32,740 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 01:02:32,741 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 01:02:32,741 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 01:02:32,742 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 01:02:32,743 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 01:02:32,743 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 01:02:32,744 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 01:02:32,744 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 01:02:32,745 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 01:02:32,745 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 01:02:32,746 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 01:02:32,746 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 01:02:32,747 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 01:02:32,747 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 01:02:32,748 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 01:02:32,748 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 01:02:32,748 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 01:02:32,749 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 01:02:32,749 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 01:02:32,750 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 01:02:32,750 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 01:02:32,751 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:02:32,751 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 01:02:32,752 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 01:02:32,752 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 01:02:32,752 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 01:02:32,753 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 01:02:32,753 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 01:02:32,753 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 01:02:32,754 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 01:02:32,754 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_6bd318f7-05c8-4463-824a-4b8402d20ba1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c79b0cfbfa84c2390344382edf3f60a855c5e1f87aaed3ee77c2dd6c5f017188 [2023-11-12 01:02:32,994 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 01:02:33,036 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 01:02:33,039 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 01:02:33,040 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 01:02:33,041 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 01:02:33,042 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/array-patterns/array29_pattern.c [2023-11-12 01:02:36,286 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 01:02:36,504 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 01:02:36,504 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/sv-benchmarks/c/array-patterns/array29_pattern.c [2023-11-12 01:02:36,513 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/data/26eb74ee1/7324452fa81042ea8cf3cea8fca619e7/FLAGaedb1f4a6 [2023-11-12 01:02:36,531 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/data/26eb74ee1/7324452fa81042ea8cf3cea8fca619e7 [2023-11-12 01:02:36,541 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 01:02:36,544 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 01:02:36,548 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 01:02:36,549 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 01:02:36,554 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 01:02:36,555 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:02:36" (1/1) ... [2023-11-12 01:02:36,556 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42c70ea0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:36, skipping insertion in model container [2023-11-12 01:02:36,557 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:02:36" (1/1) ... [2023-11-12 01:02:36,584 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 01:02:36,767 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_6bd318f7-05c8-4463-824a-4b8402d20ba1/sv-benchmarks/c/array-patterns/array29_pattern.c[1255,1268] [2023-11-12 01:02:36,787 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:02:36,797 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 01:02:36,811 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_6bd318f7-05c8-4463-824a-4b8402d20ba1/sv-benchmarks/c/array-patterns/array29_pattern.c[1255,1268] [2023-11-12 01:02:36,820 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:02:36,837 INFO L206 MainTranslator]: Completed translation [2023-11-12 01:02:36,837 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:36 WrapperNode [2023-11-12 01:02:36,838 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 01:02:36,839 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 01:02:36,839 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 01:02:36,840 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 01:02:36,848 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:36" (1/1) ... [2023-11-12 01:02:36,857 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:36" (1/1) ... [2023-11-12 01:02:36,878 INFO L138 Inliner]: procedures = 16, calls = 15, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 72 [2023-11-12 01:02:36,878 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 01:02:36,879 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 01:02:36,879 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 01:02:36,880 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 01:02:36,889 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:36" (1/1) ... [2023-11-12 01:02:36,890 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:36" (1/1) ... [2023-11-12 01:02:36,892 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:36" (1/1) ... [2023-11-12 01:02:36,892 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:36" (1/1) ... [2023-11-12 01:02:36,897 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:36" (1/1) ... [2023-11-12 01:02:36,901 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:36" (1/1) ... [2023-11-12 01:02:36,903 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:36" (1/1) ... [2023-11-12 01:02:36,904 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:36" (1/1) ... [2023-11-12 01:02:36,907 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 01:02:36,908 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 01:02:36,908 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 01:02:36,908 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 01:02:36,909 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:36" (1/1) ... [2023-11-12 01:02:36,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:02:36,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:36,943 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 01:02:36,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 01:02:36,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 01:02:36,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 01:02:36,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 01:02:36,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 01:02:36,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 01:02:36,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 01:02:36,980 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 01:02:36,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 01:02:37,055 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 01:02:37,067 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 01:02:37,241 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 01:02:37,326 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 01:02:37,327 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-12 01:02:37,329 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:02:37 BoogieIcfgContainer [2023-11-12 01:02:37,330 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 01:02:37,333 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 01:02:37,333 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 01:02:37,336 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 01:02:37,337 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 01:02:36" (1/3) ... [2023-11-12 01:02:37,337 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b43c847 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:02:37, skipping insertion in model container [2023-11-12 01:02:37,338 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:36" (2/3) ... [2023-11-12 01:02:37,338 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b43c847 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:02:37, skipping insertion in model container [2023-11-12 01:02:37,338 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:02:37" (3/3) ... [2023-11-12 01:02:37,340 INFO L112 eAbstractionObserver]: Analyzing ICFG array29_pattern.c [2023-11-12 01:02:37,361 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 01:02:37,361 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 01:02:37,412 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 01:02:37,419 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;@546e96d2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 01:02:37,419 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 01:02:37,424 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:37,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-12 01:02:37,434 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:37,434 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 01:02:37,436 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:37,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:37,459 INFO L85 PathProgramCache]: Analyzing trace with hash 119188313, now seen corresponding path program 1 times [2023-11-12 01:02:37,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:37,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018520846] [2023-11-12 01:02:37,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:37,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:37,573 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:02:37,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1418727978] [2023-11-12 01:02:37,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:37,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:37,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:37,581 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:37,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 01:02:37,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:37,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 01:02:37,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:02:37,822 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 01:02:37,823 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:02:37,823 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:37,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018520846] [2023-11-12 01:02:37,824 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:02:37,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418727978] [2023-11-12 01:02:37,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418727978] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:37,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:37,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 01:02:37,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140450763] [2023-11-12 01:02:37,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:37,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:02:37,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:37,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:02:37,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:02:37,890 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:37,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:37,971 INFO L93 Difference]: Finished difference Result 19 states and 27 transitions. [2023-11-12 01:02:37,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:02:37,974 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-12 01:02:37,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:37,983 INFO L225 Difference]: With dead ends: 19 [2023-11-12 01:02:37,983 INFO L226 Difference]: Without dead ends: 10 [2023-11-12 01:02:37,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:02:37,991 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:37,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 7 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:02:38,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-11-12 01:02:38,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2023-11-12 01:02:38,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:38,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 12 transitions. [2023-11-12 01:02:38,031 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 12 transitions. Word has length 5 [2023-11-12 01:02:38,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:38,032 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 12 transitions. [2023-11-12 01:02:38,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:38,032 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 12 transitions. [2023-11-12 01:02:38,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-12 01:02:38,034 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:38,034 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:38,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 01:02:38,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 01:02:38,242 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:38,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:38,242 INFO L85 PathProgramCache]: Analyzing trace with hash 726180671, now seen corresponding path program 1 times [2023-11-12 01:02:38,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:38,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906275431] [2023-11-12 01:02:38,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:38,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:38,258 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:02:38,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [118318158] [2023-11-12 01:02:38,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:38,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:38,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:38,260 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:38,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 01:02:38,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:38,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 01:02:38,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:02:38,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:38,393 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:02:38,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:38,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906275431] [2023-11-12 01:02:38,395 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:02:38,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118318158] [2023-11-12 01:02:38,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118318158] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:38,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:38,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 01:02:38,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726459580] [2023-11-12 01:02:38,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:38,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 01:02:38,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:38,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 01:02:38,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:02:38,402 INFO L87 Difference]: Start difference. First operand 9 states and 12 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:38,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:38,455 INFO L93 Difference]: Finished difference Result 18 states and 26 transitions. [2023-11-12 01:02:38,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 01:02:38,456 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-12 01:02:38,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:38,457 INFO L225 Difference]: With dead ends: 18 [2023-11-12 01:02:38,457 INFO L226 Difference]: Without dead ends: 11 [2023-11-12 01:02:38,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:02:38,461 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 11 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:38,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 4 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 01:02:38,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-11-12 01:02:38,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-11-12 01:02:38,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:38,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2023-11-12 01:02:38,474 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 7 [2023-11-12 01:02:38,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:38,474 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2023-11-12 01:02:38,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:38,476 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2023-11-12 01:02:38,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-12 01:02:38,476 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:38,477 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:38,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 01:02:38,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:38,683 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:38,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:38,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1118258091, now seen corresponding path program 1 times [2023-11-12 01:02:38,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:38,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775723501] [2023-11-12 01:02:38,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:38,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:38,704 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:02:38,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1902152454] [2023-11-12 01:02:38,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:38,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:38,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:38,714 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:38,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 01:02:38,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:38,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 01:02:38,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:02:38,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:38,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:02:38,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:38,897 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:38,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775723501] [2023-11-12 01:02:38,897 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:02:38,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902152454] [2023-11-12 01:02:38,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902152454] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:02:38,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1136573119] [2023-11-12 01:02:38,925 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-12 01:02:38,925 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:02:38,929 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:02:38,936 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:02:38,937 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:02:39,854 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:02:40,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1136573119] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:40,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 01:02:40,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 9 [2023-11-12 01:02:40,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694915311] [2023-11-12 01:02:40,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:40,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 01:02:40,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:40,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 01:02:40,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-12 01:02:40,015 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:40,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:40,088 INFO L93 Difference]: Finished difference Result 19 states and 24 transitions. [2023-11-12 01:02:40,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 01:02:40,089 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-12 01:02:40,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:40,089 INFO L225 Difference]: With dead ends: 19 [2023-11-12 01:02:40,090 INFO L226 Difference]: Without dead ends: 16 [2023-11-12 01:02:40,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-12 01:02:40,092 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:40,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:02:40,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-12 01:02:40,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2023-11-12 01:02:40,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:40,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2023-11-12 01:02:40,100 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 8 [2023-11-12 01:02:40,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:40,100 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2023-11-12 01:02:40,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:40,101 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2023-11-12 01:02:40,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-12 01:02:40,101 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:40,101 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:40,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 01:02:40,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:40,307 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:40,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:40,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1213103331, now seen corresponding path program 1 times [2023-11-12 01:02:40,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:40,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090770517] [2023-11-12 01:02:40,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:40,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:40,322 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:02:40,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1593711778] [2023-11-12 01:02:40,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:40,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:40,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:40,325 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:40,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 01:02:40,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:40,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 01:02:40,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:02:40,427 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 01:02:40,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:02:40,453 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 01:02:40,453 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:40,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090770517] [2023-11-12 01:02:40,453 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:02:40,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593711778] [2023-11-12 01:02:40,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593711778] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:02:40,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2117023467] [2023-11-12 01:02:40,458 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-12 01:02:40,458 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:02:40,459 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:02:40,459 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:02:40,459 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:02:41,034 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:02:41,574 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '308#(and (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (<= 1 |#StackHeapBarrier|) (not (= (+ (* 2 |ULTIMATE.start_main_~sum~0#1|) (* 2 (* ~ARR_SIZE~0 ~ARR_SIZE~0))) (+ (* ~ARR_SIZE~0 ~ARR_SIZE~0 ~ARR_SIZE~0) ~ARR_SIZE~0))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 2 ~ARR_SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~column~0#1|) (<= ~ARR_SIZE~0 32767) (<= 2 |ULTIMATE.start_main_~#array~0#1.base|))' at error location [2023-11-12 01:02:41,574 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:02:41,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 01:02:41,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-11-12 01:02:41,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18492985] [2023-11-12 01:02:41,575 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 01:02:41,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 01:02:41,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:41,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 01:02:41,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-11-12 01:02:41,578 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:41,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:41,627 INFO L93 Difference]: Finished difference Result 24 states and 32 transitions. [2023-11-12 01:02:41,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 01:02:41,628 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-12 01:02:41,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:41,629 INFO L225 Difference]: With dead ends: 24 [2023-11-12 01:02:41,629 INFO L226 Difference]: Without dead ends: 14 [2023-11-12 01:02:41,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-11-12 01:02:41,631 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 10 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:41,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 8 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 01:02:41,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-11-12 01:02:41,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-11-12 01:02:41,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:41,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2023-11-12 01:02:41,639 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 11 [2023-11-12 01:02:41,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:41,639 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2023-11-12 01:02:41,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:41,640 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2023-11-12 01:02:41,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-12 01:02:41,641 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:41,641 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:41,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 01:02:41,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:41,847 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:41,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:41,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1404443406, now seen corresponding path program 2 times [2023-11-12 01:02:41,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:41,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648525246] [2023-11-12 01:02:41,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:41,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:41,864 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:02:41,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1938227066] [2023-11-12 01:02:41,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 01:02:41,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:41,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:41,872 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:41,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 01:02:41,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 01:02:41,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:02:41,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 01:02:41,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:02:41,979 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 01:02:41,979 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:02:42,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 01:02:42,003 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:42,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648525246] [2023-11-12 01:02:42,004 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:02:42,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938227066] [2023-11-12 01:02:42,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938227066] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:02:42,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1985764589] [2023-11-12 01:02:42,007 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-12 01:02:42,007 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:02:42,008 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:02:42,008 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:02:42,008 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:02:42,441 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:02:42,813 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '457#(and (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (<= 1 |#StackHeapBarrier|) (not (= (+ (* 2 |ULTIMATE.start_main_~sum~0#1|) (* 2 (* ~ARR_SIZE~0 ~ARR_SIZE~0))) (+ (* ~ARR_SIZE~0 ~ARR_SIZE~0 ~ARR_SIZE~0) ~ARR_SIZE~0))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 2 ~ARR_SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~column~0#1|) (<= ~ARR_SIZE~0 32767) (<= 2 |ULTIMATE.start_main_~#array~0#1.base|))' at error location [2023-11-12 01:02:42,813 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:02:42,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 01:02:42,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-11-12 01:02:42,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566641360] [2023-11-12 01:02:42,813 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 01:02:42,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 01:02:42,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:42,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 01:02:42,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-12 01:02:42,815 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:42,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:42,867 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2023-11-12 01:02:42,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 01:02:42,867 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-12 01:02:42,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:42,868 INFO L225 Difference]: With dead ends: 29 [2023-11-12 01:02:42,868 INFO L226 Difference]: Without dead ends: 21 [2023-11-12 01:02:42,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-12 01:02:42,870 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:42,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 9 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 01:02:42,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-12 01:02:42,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2023-11-12 01:02:42,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:42,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2023-11-12 01:02:42,880 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 13 [2023-11-12 01:02:42,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:42,880 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2023-11-12 01:02:42,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:42,880 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2023-11-12 01:02:42,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-12 01:02:42,881 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:42,881 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:42,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-12 01:02:43,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:43,082 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:43,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:43,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1423484300, now seen corresponding path program 3 times [2023-11-12 01:02:43,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:43,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930864066] [2023-11-12 01:02:43,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:43,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:43,095 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:02:43,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [647812303] [2023-11-12 01:02:43,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 01:02:43,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:43,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:43,097 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:43,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 01:02:43,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 01:02:43,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:02:43,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 01:02:43,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:02:43,230 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 01:02:43,231 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:02:43,279 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 01:02:43,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:43,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930864066] [2023-11-12 01:02:43,280 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:02:43,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647812303] [2023-11-12 01:02:43,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647812303] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:02:43,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [875210220] [2023-11-12 01:02:43,283 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-12 01:02:43,283 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:02:43,284 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:02:43,284 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:02:43,284 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:02:43,673 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:02:43,882 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '651#(and (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (not (= (+ (* 2 |ULTIMATE.start_main_~sum~0#1|) (* 2 (* ~ARR_SIZE~0 ~ARR_SIZE~0))) (+ (* ~ARR_SIZE~0 ~ARR_SIZE~0 ~ARR_SIZE~0) ~ARR_SIZE~0))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~column~0#1|))' at error location [2023-11-12 01:02:43,882 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:02:43,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 01:02:43,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-11-12 01:02:43,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204083867] [2023-11-12 01:02:43,883 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 01:02:43,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 01:02:43,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:43,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 01:02:43,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-11-12 01:02:43,884 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:44,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:44,067 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2023-11-12 01:02:44,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 01:02:44,068 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-12 01:02:44,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:44,069 INFO L225 Difference]: With dead ends: 31 [2023-11-12 01:02:44,069 INFO L226 Difference]: Without dead ends: 28 [2023-11-12 01:02:44,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2023-11-12 01:02:44,072 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 33 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:44,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 6 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:02:44,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-12 01:02:44,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2023-11-12 01:02:44,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:44,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2023-11-12 01:02:44,091 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 17 [2023-11-12 01:02:44,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:44,092 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2023-11-12 01:02:44,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:44,092 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2023-11-12 01:02:44,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-12 01:02:44,093 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:44,093 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-12 01:02:44,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-12 01:02:44,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:44,298 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:44,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:44,298 INFO L85 PathProgramCache]: Analyzing trace with hash 708502083, now seen corresponding path program 4 times [2023-11-12 01:02:44,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:44,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667592190] [2023-11-12 01:02:44,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:44,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:44,311 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:02:44,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1161201156] [2023-11-12 01:02:44,312 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 01:02:44,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:44,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:44,313 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:44,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 01:02:44,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:44,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-12 01:02:44,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:02:44,586 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-12 01:02:44,639 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-12 01:02:44,759 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 01:02:44,759 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 1 case distinctions, treesize of input 26 treesize of output 28 [2023-11-12 01:02:44,813 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 01:02:44,813 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-11-12 01:02:45,365 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:45,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:02:46,175 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 01:02:46,176 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 63 [2023-11-12 01:02:47,580 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 486 treesize of output 462 [2023-11-12 01:02:47,825 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 01:02:47,826 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 52 [2023-11-12 01:02:47,851 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 01:02:47,852 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2023-11-12 01:02:47,949 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 01:02:47,962 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 1866 treesize of output 1786 [2023-11-12 01:02:48,106 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 109 [2023-11-12 01:02:48,144 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 01:02:48,144 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 3689 treesize of output 3606 [2023-11-12 01:02:48,974 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:48,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:48,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667592190] [2023-11-12 01:02:48,975 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:02:48,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161201156] [2023-11-12 01:02:48,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161201156] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:02:48,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1538094935] [2023-11-12 01:02:48,977 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-12 01:02:48,978 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:02:48,978 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:02:48,978 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:02:48,979 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:02:49,283 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:02:49,924 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '923#(and (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (not (= (+ (* 2 |ULTIMATE.start_main_~sum~0#1|) (* 2 (* ~ARR_SIZE~0 ~ARR_SIZE~0))) (+ (* ~ARR_SIZE~0 ~ARR_SIZE~0 ~ARR_SIZE~0) ~ARR_SIZE~0))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~column~0#1|))' at error location [2023-11-12 01:02:49,924 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:02:49,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 01:02:49,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2023-11-12 01:02:49,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862043627] [2023-11-12 01:02:49,925 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 01:02:49,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-12 01:02:49,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:49,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-12 01:02:49,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1533, Unknown=0, NotChecked=0, Total=1722 [2023-11-12 01:02:49,929 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 36 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:51,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:51,778 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2023-11-12 01:02:51,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-12 01:02:51,778 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-12 01:02:51,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:51,783 INFO L225 Difference]: With dead ends: 51 [2023-11-12 01:02:51,783 INFO L226 Difference]: Without dead ends: 42 [2023-11-12 01:02:51,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=251, Invalid=2101, Unknown=0, NotChecked=0, Total=2352 [2023-11-12 01:02:51,786 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 5 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:51,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 44 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-12 01:02:51,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-12 01:02:51,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2023-11-12 01:02:51,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:51,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2023-11-12 01:02:51,803 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 21 [2023-11-12 01:02:51,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:51,804 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2023-11-12 01:02:51,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:51,804 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2023-11-12 01:02:51,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-12 01:02:51,805 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:51,805 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-12 01:02:51,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 01:02:52,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:52,013 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:52,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:52,014 INFO L85 PathProgramCache]: Analyzing trace with hash 474324634, now seen corresponding path program 5 times [2023-11-12 01:02:52,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:52,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23659744] [2023-11-12 01:02:52,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:52,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:52,027 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:02:52,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [378024375] [2023-11-12 01:02:52,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 01:02:52,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:52,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:52,029 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:52,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 01:02:52,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-12 01:02:52,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:02:52,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 01:02:52,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:02:52,829 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-12 01:02:52,829 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:02:52,908 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-12 01:02:52,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:52,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23659744] [2023-11-12 01:02:52,909 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:02:52,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378024375] [2023-11-12 01:02:52,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378024375] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:02:52,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1705861428] [2023-11-12 01:02:52,912 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-12 01:02:52,912 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:02:52,912 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:02:52,913 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:02:52,913 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:02:53,241 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:02:53,423 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1245#(and (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (or (< 0 ~ARR_SIZE~0) (and (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start_main_~row~0#1| 0))) (not (= (+ (* 2 |ULTIMATE.start_main_~sum~0#1|) (* 2 (* ~ARR_SIZE~0 ~ARR_SIZE~0))) (+ (* ~ARR_SIZE~0 ~ARR_SIZE~0 ~ARR_SIZE~0) ~ARR_SIZE~0))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~column~0#1|))' at error location [2023-11-12 01:02:53,423 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:02:53,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 01:02:53,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2023-11-12 01:02:53,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197819067] [2023-11-12 01:02:53,424 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 01:02:53,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 01:02:53,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:53,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 01:02:53,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2023-11-12 01:02:53,425 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:53,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:53,801 INFO L93 Difference]: Finished difference Result 70 states and 90 transitions. [2023-11-12 01:02:53,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-12 01:02:53,804 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-12 01:02:53,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:53,805 INFO L225 Difference]: With dead ends: 70 [2023-11-12 01:02:53,805 INFO L226 Difference]: Without dead ends: 58 [2023-11-12 01:02:53,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=250, Invalid=742, Unknown=0, NotChecked=0, Total=992 [2023-11-12 01:02:53,807 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 24 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:53,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 16 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:02:53,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-12 01:02:53,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2023-11-12 01:02:53,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 46 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:53,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2023-11-12 01:02:53,826 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 22 [2023-11-12 01:02:53,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:53,827 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2023-11-12 01:02:53,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:53,827 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2023-11-12 01:02:53,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-12 01:02:53,828 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:53,829 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2023-11-12 01:02:53,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 01:02:54,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:54,033 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:54,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:54,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1799445417, now seen corresponding path program 6 times [2023-11-12 01:02:54,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:54,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345445082] [2023-11-12 01:02:54,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:54,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:54,044 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:02:54,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [51914264] [2023-11-12 01:02:54,044 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 01:02:54,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:54,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:54,046 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:54,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 01:02:54,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 01:02:54,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:02:54,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 01:02:54,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:02:54,333 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-12 01:02:54,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:02:54,388 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-12 01:02:54,388 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:54,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345445082] [2023-11-12 01:02:54,389 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:02:54,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51914264] [2023-11-12 01:02:54,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51914264] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:02:54,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1911728516] [2023-11-12 01:02:54,391 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-12 01:02:54,391 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:02:54,392 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:02:54,392 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:02:54,392 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:02:54,676 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:02:54,860 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1665#(and (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (not (= (+ (* 2 |ULTIMATE.start_main_~sum~0#1|) (* 2 (* ~ARR_SIZE~0 ~ARR_SIZE~0))) (+ (* ~ARR_SIZE~0 ~ARR_SIZE~0 ~ARR_SIZE~0) ~ARR_SIZE~0))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~column~0#1|))' at error location [2023-11-12 01:02:54,861 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:02:54,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 01:02:54,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-12 01:02:54,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811448603] [2023-11-12 01:02:54,861 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 01:02:54,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 01:02:54,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:54,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 01:02:54,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2023-11-12 01:02:54,863 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:55,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:55,096 INFO L93 Difference]: Finished difference Result 102 states and 132 transitions. [2023-11-12 01:02:55,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 01:02:55,096 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-12 01:02:55,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:55,097 INFO L225 Difference]: With dead ends: 102 [2023-11-12 01:02:55,097 INFO L226 Difference]: Without dead ends: 70 [2023-11-12 01:02:55,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2023-11-12 01:02:55,099 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 40 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:55,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 16 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:02:55,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-12 01:02:55,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2023-11-12 01:02:55,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.2903225806451613) internal successors, (80), 62 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:55,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 80 transitions. [2023-11-12 01:02:55,137 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 80 transitions. Word has length 25 [2023-11-12 01:02:55,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:55,138 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 80 transitions. [2023-11-12 01:02:55,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:55,138 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 80 transitions. [2023-11-12 01:02:55,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-12 01:02:55,139 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:55,140 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2023-11-12 01:02:55,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 01:02:55,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:55,346 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:55,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:55,347 INFO L85 PathProgramCache]: Analyzing trace with hash -401000171, now seen corresponding path program 7 times [2023-11-12 01:02:55,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:55,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488658223] [2023-11-12 01:02:55,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:55,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:55,359 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:02:55,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [567599234] [2023-11-12 01:02:55,360 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 01:02:55,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:55,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:55,361 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:55,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 01:02:55,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:55,458 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 01:02:55,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:02:55,514 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 15 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-12 01:02:55,514 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:02:55,568 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 18 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-12 01:02:55,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:55,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488658223] [2023-11-12 01:02:55,568 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:02:55,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567599234] [2023-11-12 01:02:55,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567599234] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:02:55,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2113874517] [2023-11-12 01:02:55,571 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-12 01:02:55,571 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:02:55,571 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:02:55,571 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:02:55,572 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:02:55,862 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:02:56,029 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2158#(and (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (not (= (+ (* 2 |ULTIMATE.start_main_~sum~0#1|) (* 2 (* ~ARR_SIZE~0 ~ARR_SIZE~0))) (+ (* ~ARR_SIZE~0 ~ARR_SIZE~0 ~ARR_SIZE~0) ~ARR_SIZE~0))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~column~0#1|))' at error location [2023-11-12 01:02:56,029 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:02:56,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 01:02:56,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-11-12 01:02:56,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062623658] [2023-11-12 01:02:56,030 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 01:02:56,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 01:02:56,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:56,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 01:02:56,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-11-12 01:02:56,034 INFO L87 Difference]: Start difference. First operand 63 states and 80 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:56,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:56,201 INFO L93 Difference]: Finished difference Result 82 states and 105 transitions. [2023-11-12 01:02:56,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 01:02:56,202 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-12 01:02:56,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:56,203 INFO L225 Difference]: With dead ends: 82 [2023-11-12 01:02:56,203 INFO L226 Difference]: Without dead ends: 47 [2023-11-12 01:02:56,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2023-11-12 01:02:56,204 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 17 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:56,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 6 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:02:56,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-12 01:02:56,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2023-11-12 01:02:56,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:56,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2023-11-12 01:02:56,224 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 26 [2023-11-12 01:02:56,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:56,224 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2023-11-12 01:02:56,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:56,224 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2023-11-12 01:02:56,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-12 01:02:56,225 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:56,225 INFO L195 NwaCegarLoop]: trace histogram [11, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2023-11-12 01:02:56,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 01:02:56,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 01:02:56,434 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:56,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:56,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1455347561, now seen corresponding path program 8 times [2023-11-12 01:02:56,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:56,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90759917] [2023-11-12 01:02:56,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:56,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:56,449 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:02:56,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1801454476] [2023-11-12 01:02:56,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 01:02:56,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:56,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:56,450 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:56,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 01:02:56,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-12 01:02:56,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:02:56,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 01:02:56,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:02:56,784 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 50 proven. 3 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-11-12 01:02:56,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:02:56,840 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 50 proven. 3 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-11-12 01:02:56,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:56,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90759917] [2023-11-12 01:02:56,840 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:02:56,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801454476] [2023-11-12 01:02:56,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801454476] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:02:56,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [856645761] [2023-11-12 01:02:56,843 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-12 01:02:56,843 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:02:56,843 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:02:56,844 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:02:56,844 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:02:57,115 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:02:57,317 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2604#(and (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (not (= (+ (* 2 |ULTIMATE.start_main_~sum~0#1|) (* 2 (* ~ARR_SIZE~0 ~ARR_SIZE~0))) (+ (* ~ARR_SIZE~0 ~ARR_SIZE~0 ~ARR_SIZE~0) ~ARR_SIZE~0))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~column~0#1|))' at error location [2023-11-12 01:02:57,317 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:02:57,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 01:02:57,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-11-12 01:02:57,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020786821] [2023-11-12 01:02:57,318 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 01:02:57,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 01:02:57,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:57,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 01:02:57,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-11-12 01:02:57,319 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:57,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:57,448 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2023-11-12 01:02:57,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 01:02:57,449 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-11-12 01:02:57,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:57,450 INFO L225 Difference]: With dead ends: 62 [2023-11-12 01:02:57,450 INFO L226 Difference]: Without dead ends: 36 [2023-11-12 01:02:57,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 71 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2023-11-12 01:02:57,451 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 19 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:57,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 9 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:02:57,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-12 01:02:57,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-11-12 01:02:57,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:57,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2023-11-12 01:02:57,469 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 30 [2023-11-12 01:02:57,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:57,470 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2023-11-12 01:02:57,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:57,470 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2023-11-12 01:02:57,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-12 01:02:57,471 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:57,471 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2023-11-12 01:02:57,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-12 01:02:57,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:57,690 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:57,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:57,691 INFO L85 PathProgramCache]: Analyzing trace with hash -189116029, now seen corresponding path program 9 times [2023-11-12 01:02:57,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:57,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103529105] [2023-11-12 01:02:57,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:57,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:57,706 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:02:57,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [436131685] [2023-11-12 01:02:57,706 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 01:02:57,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:57,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:57,708 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:57,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bd318f7-05c8-4463-824a-4b8402d20ba1/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 01:02:58,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 01:02:58,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:02:58,310 WARN L260 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 121 conjunts are in the unsatisfiable core [2023-11-12 01:02:58,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:02:58,355 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-12 01:02:58,380 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 21 treesize of output 20 [2023-11-12 01:02:58,429 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 01:02:58,429 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2023-11-12 01:02:58,546 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 01:02:58,546 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-11-12 01:02:58,608 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 01:02:58,608 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2023-11-12 01:02:58,681 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 01:02:58,681 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2023-11-12 01:02:58,896 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 01:02:58,896 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2023-11-12 01:02:59,029 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 01:02:59,030 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2023-11-12 01:02:59,152 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 01:02:59,152 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 104 [2023-11-12 01:03:01,234 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:03:01,234 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:03:04,217 INFO L217 Elim1Store]: Index analysis took 260 ms [2023-11-12 01:03:05,976 INFO L322 Elim1Store]: treesize reduction 42, result has 78.9 percent of original size [2023-11-12 01:03:05,977 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 13 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 23 case distinctions, treesize of input 93 treesize of output 200 [2023-11-12 01:03:09,148 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 01:03:09,148 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 32 treesize of output 10 [2023-11-12 01:03:09,474 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 01:03:09,477 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 01:03:09,493 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 679 treesize of output 439 [2023-11-12 01:03:10,837 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 01:03:10,837 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 52 [2023-11-12 01:03:10,854 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 01:03:10,854 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2023-11-12 01:03:10,906 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 136 treesize of output 116 [2023-11-12 01:03:10,912 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 15 treesize of output 4 [2023-11-12 01:03:10,927 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-12 01:03:10,928 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 447 treesize of output 381 [2023-11-12 01:03:11,254 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:03:11,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:03:11,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103529105] [2023-11-12 01:03:11,254 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:03:11,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436131685] [2023-11-12 01:03:11,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436131685] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:03:11,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [705284240] [2023-11-12 01:03:11,256 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-12 01:03:11,256 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:03:11,257 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:03:11,257 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:03:11,257 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:03:11,513 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:03:12,501 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3076#(and (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (not (= (+ (* 2 |ULTIMATE.start_main_~sum~0#1|) (* 2 (* ~ARR_SIZE~0 ~ARR_SIZE~0))) (+ (* ~ARR_SIZE~0 ~ARR_SIZE~0 ~ARR_SIZE~0) ~ARR_SIZE~0))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~column~0#1|))' at error location [2023-11-12 01:03:12,501 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:03:12,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 01:03:12,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 65 [2023-11-12 01:03:12,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537142343] [2023-11-12 01:03:12,502 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 01:03:12,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-11-12 01:03:12,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:03:12,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-11-12 01:03:12,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=609, Invalid=4503, Unknown=0, NotChecked=0, Total=5112 [2023-11-12 01:03:12,506 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 66 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 65 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)