./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/transpose-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/transpose-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ --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 44b06771d393671cf9550617b8bf478abc837489f84f20705c70efc1808f7508 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:15:45,822 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:15:45,931 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:15:45,938 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:15:45,939 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:15:45,974 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:15:45,975 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:15:45,976 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:15:45,976 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:15:45,981 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:15:45,982 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:15:45,982 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:15:45,983 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:15:45,984 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:15:45,985 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:15:45,985 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:15:45,986 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:15:45,986 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:15:45,987 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:15:45,987 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:15:45,988 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:15:45,988 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:15:45,989 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:15:45,989 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:15:45,990 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:15:45,990 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:15:45,991 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:15:45,991 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:15:45,991 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:15:45,992 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:15:45,992 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:15:45,993 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:15:45,993 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:15:45,993 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:15:45,994 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:15:45,994 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:15:45,994 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:15:45,995 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:15:45,995 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:15:45,995 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:15:45,995 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:15:45,996 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:15:45,996 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:15:45,996 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:15:45,997 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:15:45,997 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_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 44b06771d393671cf9550617b8bf478abc837489f84f20705c70efc1808f7508 [2023-11-19 05:15:46,266 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:15:46,292 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:15:46,296 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:15:46,298 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:15:46,298 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:15:46,300 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/array-multidimensional/transpose-u.c [2023-11-19 05:15:49,425 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:15:49,705 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:15:49,705 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/sv-benchmarks/c/array-multidimensional/transpose-u.c [2023-11-19 05:15:49,713 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/data/13f826927/aee26e7c0cc04101baf82bb33018bd7a/FLAG2546c9dfc [2023-11-19 05:15:49,734 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/data/13f826927/aee26e7c0cc04101baf82bb33018bd7a [2023-11-19 05:15:49,740 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:15:49,743 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:15:49,746 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:15:49,747 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:15:49,752 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:15:49,752 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:15:49" (1/1) ... [2023-11-19 05:15:49,754 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34d61b45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:15:49, skipping insertion in model container [2023-11-19 05:15:49,754 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:15:49" (1/1) ... [2023-11-19 05:15:49,779 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:15:49,945 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_90fb08a6-1535-4d06-bb34-fc38d1468607/sv-benchmarks/c/array-multidimensional/transpose-u.c[315,328] [2023-11-19 05:15:49,968 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:15:49,979 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:15:50,000 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_90fb08a6-1535-4d06-bb34-fc38d1468607/sv-benchmarks/c/array-multidimensional/transpose-u.c[315,328] [2023-11-19 05:15:50,025 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:15:50,039 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:15:50,040 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:15:50 WrapperNode [2023-11-19 05:15:50,040 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:15:50,041 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:15:50,042 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:15:50,042 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:15:50,050 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:15:50" (1/1) ... [2023-11-19 05:15:50,072 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:15:50" (1/1) ... [2023-11-19 05:15:50,099 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 88 [2023-11-19 05:15:50,099 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:15:50,100 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:15:50,100 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:15:50,100 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:15:50,108 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:15:50" (1/1) ... [2023-11-19 05:15:50,108 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:15:50" (1/1) ... [2023-11-19 05:15:50,112 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:15:50" (1/1) ... [2023-11-19 05:15:50,113 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:15:50" (1/1) ... [2023-11-19 05:15:50,122 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:15:50" (1/1) ... [2023-11-19 05:15:50,126 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:15:50" (1/1) ... [2023-11-19 05:15:50,127 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:15:50" (1/1) ... [2023-11-19 05:15:50,128 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:15:50" (1/1) ... [2023-11-19 05:15:50,130 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:15:50,131 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:15:50,132 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:15:50,133 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:15:50,134 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:15:50" (1/1) ... [2023-11-19 05:15:50,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:15:50,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:15:50,167 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:15:50,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:15:50,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:15:50,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:15:50,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 05:15:50,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 05:15:50,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:15:50,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:15:50,210 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 05:15:50,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 05:15:50,276 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:15:50,277 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:15:50,494 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:15:50,560 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:15:50,560 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-19 05:15:50,565 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:15:50 BoogieIcfgContainer [2023-11-19 05:15:50,565 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:15:50,568 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:15:50,568 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:15:50,571 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:15:50,571 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:15:49" (1/3) ... [2023-11-19 05:15:50,572 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bd84f6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:15:50, skipping insertion in model container [2023-11-19 05:15:50,572 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:15:50" (2/3) ... [2023-11-19 05:15:50,573 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bd84f6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:15:50, skipping insertion in model container [2023-11-19 05:15:50,573 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:15:50" (3/3) ... [2023-11-19 05:15:50,574 INFO L112 eAbstractionObserver]: Analyzing ICFG transpose-u.c [2023-11-19 05:15:50,590 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:15:50,590 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:15:50,638 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:15:50,645 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;@6cee3e29, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:15:50,646 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:15:50,650 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:15:50,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-19 05:15:50,657 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:15:50,657 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:15:50,658 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:15:50,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:15:50,665 INFO L85 PathProgramCache]: Analyzing trace with hash 772701100, now seen corresponding path program 1 times [2023-11-19 05:15:50,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:15:50,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780935822] [2023-11-19 05:15:50,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:50,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:15:50,792 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:15:50,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [305643855] [2023-11-19 05:15:50,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:50,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:15:50,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:15:50,800 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:15:50,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:15:50,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:50,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:15:50,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:15:51,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:15:51,005 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:15:51,006 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:15:51,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780935822] [2023-11-19 05:15:51,006 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:15:51,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305643855] [2023-11-19 05:15:51,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305643855] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:15:51,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:15:51,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:15:51,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223889134] [2023-11-19 05:15:51,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:15:51,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:15:51,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:15:51,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:15:51,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:15:51,061 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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) [2023-11-19 05:15:51,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:15:51,135 INFO L93 Difference]: Finished difference Result 23 states and 35 transitions. [2023-11-19 05:15:51,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:15:51,137 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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 [2023-11-19 05:15:51,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:15:51,145 INFO L225 Difference]: With dead ends: 23 [2023-11-19 05:15:51,145 INFO L226 Difference]: Without dead ends: 13 [2023-11-19 05:15:51,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:15:51,151 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:15:51,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 10 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:15:51,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-11-19 05:15:51,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2023-11-19 05:15:51,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:15:51,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 17 transitions. [2023-11-19 05:15:51,182 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 17 transitions. Word has length 7 [2023-11-19 05:15:51,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:15:51,182 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 17 transitions. [2023-11-19 05:15:51,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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) [2023-11-19 05:15:51,183 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 17 transitions. [2023-11-19 05:15:51,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-19 05:15:51,183 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:15:51,183 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:15:51,197 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 05:15:51,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 05:15:51,386 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:15:51,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:15:51,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1780268602, now seen corresponding path program 1 times [2023-11-19 05:15:51,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:15:51,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086194586] [2023-11-19 05:15:51,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:51,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:15:51,405 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:15:51,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1109249621] [2023-11-19 05:15:51,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:51,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:15:51,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:15:51,410 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:15:51,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:15:51,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:51,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:15:51,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:15:51,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:15:51,503 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:15:51,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:15:51,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086194586] [2023-11-19 05:15:51,504 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:15:51,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109249621] [2023-11-19 05:15:51,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109249621] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:15:51,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:15:51,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:15:51,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524394637] [2023-11-19 05:15:51,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:15:51,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:15:51,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:15:51,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:15:51,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:15:51,507 INFO L87 Difference]: Start difference. First operand 12 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:15:51,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:15:51,551 INFO L93 Difference]: Finished difference Result 31 states and 45 transitions. [2023-11-19 05:15:51,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:15:51,552 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-19 05:15:51,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:15:51,552 INFO L225 Difference]: With dead ends: 31 [2023-11-19 05:15:51,553 INFO L226 Difference]: Without dead ends: 21 [2023-11-19 05:15:51,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:15:51,554 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:15:51,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 6 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:15:51,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-19 05:15:51,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2023-11-19 05:15:51,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:15:51,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 20 transitions. [2023-11-19 05:15:51,561 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 20 transitions. Word has length 9 [2023-11-19 05:15:51,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:15:51,562 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 20 transitions. [2023-11-19 05:15:51,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:15:51,562 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 20 transitions. [2023-11-19 05:15:51,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-19 05:15:51,563 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:15:51,563 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:15:51,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:15:51,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:15:51,778 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:15:51,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:15:51,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1219869114, now seen corresponding path program 1 times [2023-11-19 05:15:51,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:15:51,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651826041] [2023-11-19 05:15:51,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:51,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:15:51,790 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:15:51,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [865628877] [2023-11-19 05:15:51,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:51,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:15:51,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:15:51,792 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:15:51,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:15:51,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:51,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 05:15:51,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:15:51,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:15:51,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:15:51,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:15:51,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:15:51,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651826041] [2023-11-19 05:15:51,964 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:15:51,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865628877] [2023-11-19 05:15:51,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865628877] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:15:51,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [456627707] [2023-11-19 05:15:51,988 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-19 05:15:51,988 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:15:51,991 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:15:51,996 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:15:51,997 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:15:52,954 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:15:53,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [456627707] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:15:53,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 05:15:53,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 10 [2023-11-19 05:15:53,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657158711] [2023-11-19 05:15:53,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:15:53,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:15:53,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:15:53,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:15:53,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2023-11-19 05:15:53,082 INFO L87 Difference]: Start difference. First operand 15 states and 20 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:15:53,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:15:53,135 INFO L93 Difference]: Finished difference Result 24 states and 31 transitions. [2023-11-19 05:15:53,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:15:53,136 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2023-11-19 05:15:53,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:15:53,136 INFO L225 Difference]: With dead ends: 24 [2023-11-19 05:15:53,137 INFO L226 Difference]: Without dead ends: 17 [2023-11-19 05:15:53,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2023-11-19 05:15:53,139 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:15:53,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 6 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:15:53,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-19 05:15:53,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2023-11-19 05:15:53,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:15:53,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2023-11-19 05:15:53,149 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 10 [2023-11-19 05:15:53,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:15:53,150 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2023-11-19 05:15:53,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:15:53,150 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2023-11-19 05:15:53,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-19 05:15:53,151 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:15:53,151 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:15:53,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 05:15:53,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:15:53,364 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:15:53,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:15:53,365 INFO L85 PathProgramCache]: Analyzing trace with hash 2079016109, now seen corresponding path program 1 times [2023-11-19 05:15:53,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:15:53,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475867944] [2023-11-19 05:15:53,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:53,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:15:53,377 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:15:53,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [501994324] [2023-11-19 05:15:53,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:53,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:15:53,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:15:53,379 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:15:53,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 05:15:53,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:53,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 05:15:53,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:15:53,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:15:53,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:15:53,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:15:53,530 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:15:53,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475867944] [2023-11-19 05:15:53,530 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:15:53,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501994324] [2023-11-19 05:15:53,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501994324] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:15:53,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [652334281] [2023-11-19 05:15:53,534 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-19 05:15:53,534 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:15:53,535 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:15:53,535 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:15:53,535 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:15:54,391 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:15:54,748 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '403#(and (= |ULTIMATE.start_main_~i~0#1| 0) (not (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (exists ((|v_ULTIMATE.start_main_~j~0#1_80| Int) (|v_ULTIMATE.start_main_~i~0#1_75| Int)) (and (<= |ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~i~0#1_75|) (<= |ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~j~0#1_80|))) (<= 1 |ULTIMATE.start_main_~n~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|) |ULTIMATE.start_main_#t~mem11#1|) (= |ULTIMATE.start_main_#t~mem10#1| (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) |ULTIMATE.start_main_~#C~0#1.offset|)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2023-11-19 05:15:54,748 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:15:54,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 05:15:54,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-11-19 05:15:54,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494831661] [2023-11-19 05:15:54,749 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 05:15:54,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 05:15:54,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:15:54,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 05:15:54,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2023-11-19 05:15:54,752 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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) [2023-11-19 05:15:54,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:15:54,881 INFO L93 Difference]: Finished difference Result 51 states and 70 transitions. [2023-11-19 05:15:54,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:15:54,881 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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) Word has length 13 [2023-11-19 05:15:54,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:15:54,884 INFO L225 Difference]: With dead ends: 51 [2023-11-19 05:15:54,884 INFO L226 Difference]: Without dead ends: 37 [2023-11-19 05:15:54,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2023-11-19 05:15:54,887 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 44 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:15:54,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 12 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:15:54,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-19 05:15:54,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2023-11-19 05:15:54,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:15:54,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2023-11-19 05:15:54,900 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 13 [2023-11-19 05:15:54,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:15:54,900 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2023-11-19 05:15:54,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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) [2023-11-19 05:15:54,901 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2023-11-19 05:15:54,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-19 05:15:54,902 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:15:54,902 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:15:54,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 05:15:55,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:15:55,124 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:15:55,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:15:55,125 INFO L85 PathProgramCache]: Analyzing trace with hash 362786941, now seen corresponding path program 2 times [2023-11-19 05:15:55,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:15:55,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724455380] [2023-11-19 05:15:55,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:55,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:15:55,148 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:15:55,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [759430717] [2023-11-19 05:15:55,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 05:15:55,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:15:55,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:15:55,150 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:15:55,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 05:15:55,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 05:15:55,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:15:55,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 05:15:55,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:15:55,268 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-19 05:15:55,268 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:15:55,293 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-19 05:15:55,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:15:55,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724455380] [2023-11-19 05:15:55,294 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:15:55,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759430717] [2023-11-19 05:15:55,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759430717] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:15:55,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1801787642] [2023-11-19 05:15:55,302 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-19 05:15:55,302 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:15:55,303 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:15:55,303 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:15:55,303 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:15:55,980 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:15:56,316 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '661#(and (exists ((|v_ULTIMATE.start_main_~i~0#1_89| Int) (|v_ULTIMATE.start_main_~j~0#1_109| Int)) (and (<= |ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~j~0#1_109|) (<= |ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~i~0#1_89|))) (= |ULTIMATE.start_main_~i~0#1| 0) (not (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|) |ULTIMATE.start_main_#t~mem11#1|) (= |ULTIMATE.start_main_#t~mem10#1| (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) |ULTIMATE.start_main_~#C~0#1.offset|)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2023-11-19 05:15:56,316 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:15:56,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 05:15:56,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-11-19 05:15:56,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182366706] [2023-11-19 05:15:56,317 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 05:15:56,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:15:56,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:15:56,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:15:56,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-11-19 05:15:56,319 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:15:56,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:15:56,378 INFO L93 Difference]: Finished difference Result 72 states and 92 transitions. [2023-11-19 05:15:56,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:15:56,379 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-19 05:15:56,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:15:56,382 INFO L225 Difference]: With dead ends: 72 [2023-11-19 05:15:56,382 INFO L226 Difference]: Without dead ends: 49 [2023-11-19 05:15:56,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-11-19 05:15:56,384 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:15:56,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 8 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:15:56,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-19 05:15:56,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-11-19 05:15:56,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.25) internal successors, (60), 48 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) [2023-11-19 05:15:56,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2023-11-19 05:15:56,431 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 19 [2023-11-19 05:15:56,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:15:56,431 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2023-11-19 05:15:56,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:15:56,432 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2023-11-19 05:15:56,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-19 05:15:56,433 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:15:56,434 INFO L195 NwaCegarLoop]: trace histogram [16, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:15:56,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 05:15:56,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:15:56,648 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:15:56,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:15:56,649 INFO L85 PathProgramCache]: Analyzing trace with hash 959660619, now seen corresponding path program 3 times [2023-11-19 05:15:56,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:15:56,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925584861] [2023-11-19 05:15:56,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:56,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:15:56,671 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:15:56,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [668114869] [2023-11-19 05:15:56,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 05:15:56,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:15:56,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:15:56,673 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:15:56,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 05:15:56,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 05:15:56,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:15:56,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 05:15:56,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:15:56,821 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2023-11-19 05:15:56,821 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:15:56,896 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2023-11-19 05:15:56,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:15:56,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925584861] [2023-11-19 05:15:56,897 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:15:56,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668114869] [2023-11-19 05:15:56,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668114869] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:15:56,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [293472217] [2023-11-19 05:15:56,902 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-19 05:15:56,902 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:15:56,903 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:15:56,903 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:15:56,903 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:15:57,467 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:15:57,854 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1111#(and (= |ULTIMATE.start_main_~i~0#1| 0) (not (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|) |ULTIMATE.start_main_#t~mem11#1|) (= |ULTIMATE.start_main_#t~mem10#1| (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) |ULTIMATE.start_main_~#C~0#1.offset|)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_102| Int) (|v_ULTIMATE.start_main_~j~0#1_136| Int)) (and (<= |ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~j~0#1_136|) (<= |ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~i~0#1_102|))))' at error location [2023-11-19 05:15:57,854 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:15:57,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 05:15:57,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-11-19 05:15:57,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335667322] [2023-11-19 05:15:57,855 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 05:15:57,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 05:15:57,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:15:57,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 05:15:57,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2023-11-19 05:15:57,856 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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) [2023-11-19 05:15:58,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:15:58,392 INFO L93 Difference]: Finished difference Result 148 states and 173 transitions. [2023-11-19 05:15:58,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-19 05:15:58,393 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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 37 [2023-11-19 05:15:58,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:15:58,394 INFO L225 Difference]: With dead ends: 148 [2023-11-19 05:15:58,395 INFO L226 Difference]: Without dead ends: 132 [2023-11-19 05:15:58,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=419, Invalid=1221, Unknown=0, NotChecked=0, Total=1640 [2023-11-19 05:15:58,398 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 124 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:15:58,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 99 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:15:58,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-11-19 05:15:58,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 67. [2023-11-19 05:15:58,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.2272727272727273) internal successors, (81), 66 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:15:58,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2023-11-19 05:15:58,423 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 37 [2023-11-19 05:15:58,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:15:58,424 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2023-11-19 05:15:58,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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) [2023-11-19 05:15:58,424 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2023-11-19 05:15:58,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-19 05:15:58,426 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:15:58,426 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:15:58,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 05:15:58,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:15:58,640 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:15:58,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:15:58,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1149059184, now seen corresponding path program 4 times [2023-11-19 05:15:58,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:15:58,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918659594] [2023-11-19 05:15:58,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:58,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:15:58,671 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:15:58,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1056699154] [2023-11-19 05:15:58,675 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 05:15:58,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:15:58,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:15:58,677 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:15:58,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 05:15:58,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:58,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 05:15:58,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:15:58,903 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 79 proven. 10 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2023-11-19 05:15:58,903 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:15:58,972 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 79 proven. 10 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2023-11-19 05:15:58,972 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:15:58,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918659594] [2023-11-19 05:15:58,972 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:15:58,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056699154] [2023-11-19 05:15:58,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056699154] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:15:58,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [306421850] [2023-11-19 05:15:58,975 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-19 05:15:58,976 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:15:58,976 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:15:58,976 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:15:58,976 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:15:59,549 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:15:59,856 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1852#(and (= |ULTIMATE.start_main_~i~0#1| 0) (exists ((|v_ULTIMATE.start_main_~j~0#1_199| Int) (|v_ULTIMATE.start_main_~i~0#1_121| Int)) (and (<= |ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~j~0#1_199|) (<= |ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~i~0#1_121|))) (not (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|) |ULTIMATE.start_main_#t~mem11#1|) (= |ULTIMATE.start_main_#t~mem10#1| (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) |ULTIMATE.start_main_~#C~0#1.offset|)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2023-11-19 05:15:59,856 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:15:59,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 05:15:59,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-11-19 05:15:59,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61411065] [2023-11-19 05:15:59,857 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 05:15:59,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 05:15:59,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:15:59,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 05:15:59,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2023-11-19 05:15:59,858 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2023-11-19 05:16:00,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:16:00,157 INFO L93 Difference]: Finished difference Result 211 states and 289 transitions. [2023-11-19 05:16:00,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 05:16:00,157 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 55 [2023-11-19 05:16:00,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:16:00,159 INFO L225 Difference]: With dead ends: 211 [2023-11-19 05:16:00,159 INFO L226 Difference]: Without dead ends: 151 [2023-11-19 05:16:00,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=517, Unknown=0, NotChecked=0, Total=702 [2023-11-19 05:16:00,160 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 202 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:16:00,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 30 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:16:00,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-11-19 05:16:00,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 133. [2023-11-19 05:16:00,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.1590909090909092) internal successors, (153), 132 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:16:00,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 153 transitions. [2023-11-19 05:16:00,205 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 153 transitions. Word has length 55 [2023-11-19 05:16:00,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:16:00,205 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 153 transitions. [2023-11-19 05:16:00,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2023-11-19 05:16:00,206 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 153 transitions. [2023-11-19 05:16:00,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-19 05:16:00,207 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:16:00,207 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:16:00,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 05:16:00,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:16:00,428 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:16:00,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:16:00,429 INFO L85 PathProgramCache]: Analyzing trace with hash -970721808, now seen corresponding path program 5 times [2023-11-19 05:16:00,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:16:00,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975718554] [2023-11-19 05:16:00,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:16:00,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:16:00,485 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:16:00,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1821758887] [2023-11-19 05:16:00,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 05:16:00,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:16:00,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:16:00,486 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:16:00,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 05:16:26,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2023-11-19 05:16:26,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:16:26,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 05:16:26,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:16:26,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1912 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 1490 trivial. 0 not checked. [2023-11-19 05:16:26,823 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:16:27,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1912 backedges. 4 proven. 418 refuted. 0 times theorem prover too weak. 1490 trivial. 0 not checked. [2023-11-19 05:16:27,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:16:27,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975718554] [2023-11-19 05:16:27,081 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:16:27,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821758887] [2023-11-19 05:16:27,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821758887] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:16:27,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1463277927] [2023-11-19 05:16:27,083 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-19 05:16:27,083 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:16:27,084 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:16:27,084 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:16:27,084 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:16:27,582 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:16:27,882 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3122#(and (= |ULTIMATE.start_main_~i~0#1| 0) (not (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|) |ULTIMATE.start_main_#t~mem11#1|) (exists ((|v_ULTIMATE.start_main_~j~0#1_316| Int) (|v_ULTIMATE.start_main_~i~0#1_140| Int)) (and (<= |ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~i~0#1_140|) (<= |ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~j~0#1_316|))) (= |ULTIMATE.start_main_#t~mem10#1| (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) |ULTIMATE.start_main_~#C~0#1.offset|)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2023-11-19 05:16:27,882 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:16:27,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 05:16:27,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2023-11-19 05:16:27,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374684327] [2023-11-19 05:16:27,883 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 05:16:27,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-19 05:16:27,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:16:27,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-19 05:16:27,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=785, Unknown=0, NotChecked=0, Total=1122 [2023-11-19 05:16:27,885 INFO L87 Difference]: Start difference. First operand 133 states and 153 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 25 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) [2023-11-19 05:16:28,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:16:28,500 INFO L93 Difference]: Finished difference Result 427 states and 565 transitions. [2023-11-19 05:16:28,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-19 05:16:28,500 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 25 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 103 [2023-11-19 05:16:28,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:16:28,502 INFO L225 Difference]: With dead ends: 427 [2023-11-19 05:16:28,503 INFO L226 Difference]: Without dead ends: 307 [2023-11-19 05:16:28,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2023-11-19 05:16:28,505 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 351 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:16:28,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 66 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:16:28,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2023-11-19 05:16:28,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 265. [2023-11-19 05:16:28,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.125) internal successors, (297), 264 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:16:28,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 297 transitions. [2023-11-19 05:16:28,577 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 297 transitions. Word has length 103 [2023-11-19 05:16:28,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:16:28,577 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 297 transitions. [2023-11-19 05:16:28,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 25 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) [2023-11-19 05:16:28,577 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 297 transitions. [2023-11-19 05:16:28,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-11-19 05:16:28,580 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:16:28,580 INFO L195 NwaCegarLoop]: trace histogram [88, 88, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:16:28,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 05:16:28,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:16:28,781 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:16:28,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:16:28,782 INFO L85 PathProgramCache]: Analyzing trace with hash 538116336, now seen corresponding path program 6 times [2023-11-19 05:16:28,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:16:28,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78905044] [2023-11-19 05:16:28,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:16:28,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:16:28,872 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:16:28,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1155837623] [2023-11-19 05:16:28,873 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 05:16:28,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:16:28,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:16:28,874 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:16:28,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 05:16:29,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 05:16:29,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:16:29,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-19 05:16:29,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:16:29,971 INFO L134 CoverageAnalysis]: Checked inductivity of 8392 backedges. 231 proven. 3206 refuted. 0 times theorem prover too weak. 4955 trivial. 0 not checked. [2023-11-19 05:16:29,971 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:16:30,632 INFO L134 CoverageAnalysis]: Checked inductivity of 8392 backedges. 231 proven. 3206 refuted. 0 times theorem prover too weak. 4955 trivial. 0 not checked. [2023-11-19 05:16:30,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:16:30,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78905044] [2023-11-19 05:16:30,633 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:16:30,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155837623] [2023-11-19 05:16:30,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155837623] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:16:30,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2004435586] [2023-11-19 05:16:30,636 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-19 05:16:30,636 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:16:30,636 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:16:30,636 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:16:30,636 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:16:31,089 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:16:31,663 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5624#(and (exists ((|v_ULTIMATE.start_main_~i~0#1_159| Int) (|v_ULTIMATE.start_main_~j~0#1_448| Int)) (and (<= |ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~i~0#1_159|) (<= |ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~j~0#1_448|))) (= |ULTIMATE.start_main_~i~0#1| 0) (not (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|) |ULTIMATE.start_main_#t~mem11#1|) (= |ULTIMATE.start_main_#t~mem10#1| (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) |ULTIMATE.start_main_~#C~0#1.offset|)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2023-11-19 05:16:31,663 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:16:31,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 05:16:31,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2023-11-19 05:16:31,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815940583] [2023-11-19 05:16:31,663 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 05:16:31,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-11-19 05:16:31,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:16:31,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-11-19 05:16:31,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1282, Invalid=3008, Unknown=0, NotChecked=0, Total=4290 [2023-11-19 05:16:31,668 INFO L87 Difference]: Start difference. First operand 265 states and 297 transitions. Second operand has 58 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 58 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:16:35,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:16:35,508 INFO L93 Difference]: Finished difference Result 1487 states and 1700 transitions. [2023-11-19 05:16:35,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2023-11-19 05:16:35,509 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 58 states have internal predecessors, (78), 0 states have call successors, (0), 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 199 [2023-11-19 05:16:35,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:16:35,517 INFO L225 Difference]: With dead ends: 1487 [2023-11-19 05:16:35,517 INFO L226 Difference]: Without dead ends: 1320 [2023-11-19 05:16:35,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 756 GetRequests, 588 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10926 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=8514, Invalid=20216, Unknown=0, NotChecked=0, Total=28730 [2023-11-19 05:16:35,531 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 614 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 449 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 1478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 449 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:16:35,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [614 Valid, 672 Invalid, 1478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [449 Valid, 1029 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-19 05:16:35,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2023-11-19 05:16:35,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 553. [2023-11-19 05:16:35,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 552 states have (on average 1.0815217391304348) internal successors, (597), 552 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:16:35,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 597 transitions. [2023-11-19 05:16:35,709 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 597 transitions. Word has length 199 [2023-11-19 05:16:35,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:16:35,710 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 597 transitions. [2023-11-19 05:16:35,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 58 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:16:35,710 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 597 transitions. [2023-11-19 05:16:35,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2023-11-19 05:16:35,722 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:16:35,722 INFO L195 NwaCegarLoop]: trace histogram [220, 220, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:16:35,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 05:16:35,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:16:35,953 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:16:35,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:16:35,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1043523286, now seen corresponding path program 7 times [2023-11-19 05:16:35,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:16:35,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535623732] [2023-11-19 05:16:35,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:16:35,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:16:36,188 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:16:36,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1243642078] [2023-11-19 05:16:36,189 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 05:16:36,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:16:36,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:16:36,190 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:16:36,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 05:16:37,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:16:37,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 3712 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-19 05:16:37,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:16:37,894 INFO L134 CoverageAnalysis]: Checked inductivity of 52780 backedges. 4771 proven. 253 refuted. 0 times theorem prover too weak. 47756 trivial. 0 not checked. [2023-11-19 05:16:37,894 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:16:38,692 INFO L134 CoverageAnalysis]: Checked inductivity of 52780 backedges. 4771 proven. 253 refuted. 0 times theorem prover too weak. 47756 trivial. 0 not checked. [2023-11-19 05:16:38,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:16:38,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535623732] [2023-11-19 05:16:38,693 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:16:38,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243642078] [2023-11-19 05:16:38,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243642078] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:16:38,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1050900268] [2023-11-19 05:16:38,696 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-19 05:16:38,697 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:16:38,697 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:16:38,697 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:16:38,698 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:16:39,232 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:16:39,607 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12253#(and (exists ((|v_ULTIMATE.start_main_~j~0#1_949| Int) (|v_ULTIMATE.start_main_~i~0#1_190| Int)) (and (<= |ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~i~0#1_190|) (<= |ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~j~0#1_949|))) (= |ULTIMATE.start_main_~i~0#1| 0) (not (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|) |ULTIMATE.start_main_#t~mem11#1|) (= |ULTIMATE.start_main_#t~mem10#1| (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) |ULTIMATE.start_main_~#C~0#1.offset|)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2023-11-19 05:16:39,607 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:16:39,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 05:16:39,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2023-11-19 05:16:39,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884281309] [2023-11-19 05:16:39,608 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 05:16:39,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-11-19 05:16:39,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:16:39,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-11-19 05:16:39,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1213, Invalid=2093, Unknown=0, NotChecked=0, Total=3306 [2023-11-19 05:16:39,613 INFO L87 Difference]: Start difference. First operand 553 states and 597 transitions. Second operand has 50 states, 50 states have (on average 1.24) internal successors, (62), 49 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:16:41,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:16:41,697 INFO L93 Difference]: Finished difference Result 1723 states and 2293 transitions. [2023-11-19 05:16:41,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-19 05:16:41,697 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.24) internal successors, (62), 49 states have internal predecessors, (62), 0 states have call successors, (0), 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 487 [2023-11-19 05:16:41,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:16:41,706 INFO L225 Difference]: With dead ends: 1723 [2023-11-19 05:16:41,706 INFO L226 Difference]: Without dead ends: 1195 [2023-11-19 05:16:41,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1482 GetRequests, 1403 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1875 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2363, Invalid=4117, Unknown=0, NotChecked=0, Total=6480 [2023-11-19 05:16:41,711 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 799 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 366 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 799 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 05:16:41,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [799 Valid, 138 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 05:16:41,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2023-11-19 05:16:41,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1105. [2023-11-19 05:16:42,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1105 states, 1104 states have (on average 1.0625) internal successors, (1173), 1104 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:16:42,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 1173 transitions. [2023-11-19 05:16:42,007 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 1173 transitions. Word has length 487 [2023-11-19 05:16:42,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:16:42,007 INFO L495 AbstractCegarLoop]: Abstraction has 1105 states and 1173 transitions. [2023-11-19 05:16:42,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.24) internal successors, (62), 49 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:16:42,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 1173 transitions. [2023-11-19 05:16:42,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 968 [2023-11-19 05:16:42,059 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:16:42,060 INFO L195 NwaCegarLoop]: trace histogram [460, 460, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:16:42,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 05:16:42,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 05:16:42,276 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:16:42,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:16:42,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1757510614, now seen corresponding path program 8 times [2023-11-19 05:16:42,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:16:42,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261056050] [2023-11-19 05:16:42,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:16:42,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:16:42,852 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:16:42,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [582822226] [2023-11-19 05:16:42,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 05:16:42,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:16:42,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:16:42,857 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:16:42,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90fb08a6-1535-4d06-bb34-fc38d1468607/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process