./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/init-2-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/init-2-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 44b18e123610caaf6237dddd08dfbd765ad919d1168e6261239628431b3c22b1 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:45:39,405 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:45:39,545 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:45:39,558 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:45:39,560 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:45:39,604 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:45:39,604 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:45:39,605 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:45:39,606 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:45:39,612 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:45:39,612 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:45:39,613 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:45:39,613 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:45:39,615 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:45:39,616 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:45:39,616 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:45:39,616 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:45:39,617 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:45:39,618 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:45:39,618 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:45:39,620 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:45:39,621 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:45:39,622 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:45:39,623 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:45:39,623 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:45:39,624 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:45:39,624 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:45:39,624 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:45:39,625 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:45:39,625 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:45:39,627 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:45:39,627 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:45:39,627 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:45:39,628 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:45:39,628 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:45:39,628 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:45:39,629 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:45:39,629 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:45:39,630 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:45:39,630 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:45:39,630 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:45:39,631 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:45:39,631 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:45:39,631 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:45:39,632 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:45:39,632 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_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 44b18e123610caaf6237dddd08dfbd765ad919d1168e6261239628431b3c22b1 [2023-11-12 00:45:39,961 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:45:39,994 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:45:39,997 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:45:39,998 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:45:39,999 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:45:40,001 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/array-multidimensional/init-2-n-u.c [2023-11-12 00:45:43,751 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:45:43,979 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:45:43,980 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/sv-benchmarks/c/array-multidimensional/init-2-n-u.c [2023-11-12 00:45:43,988 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX/data/7a50d5b90/7f36b4aa7de24bb0a9baf818d251202e/FLAG229c63a48 [2023-11-12 00:45:44,008 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX/data/7a50d5b90/7f36b4aa7de24bb0a9baf818d251202e [2023-11-12 00:45:44,017 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:45:44,020 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:45:44,026 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:45:44,026 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:45:44,032 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:45:44,033 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:45:44" (1/1) ... [2023-11-12 00:45:44,034 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71a7db8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:44, skipping insertion in model container [2023-11-12 00:45:44,034 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:45:44" (1/1) ... [2023-11-12 00:45:44,063 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:45:44,256 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_d6bd1871-9e81-4507-9adb-77a202e79e81/sv-benchmarks/c/array-multidimensional/init-2-n-u.c[322,335] [2023-11-12 00:45:44,282 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:45:44,294 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:45:44,310 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_d6bd1871-9e81-4507-9adb-77a202e79e81/sv-benchmarks/c/array-multidimensional/init-2-n-u.c[322,335] [2023-11-12 00:45:44,324 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:45:44,341 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:45:44,342 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:44 WrapperNode [2023-11-12 00:45:44,342 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:45:44,344 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:45:44,344 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:45:44,344 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:45:44,353 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:44" (1/1) ... [2023-11-12 00:45:44,361 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:44" (1/1) ... [2023-11-12 00:45:44,385 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 60 [2023-11-12 00:45:44,386 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:45:44,387 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:45:44,387 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:45:44,387 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:45:44,398 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:44" (1/1) ... [2023-11-12 00:45:44,398 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:44" (1/1) ... [2023-11-12 00:45:44,411 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:44" (1/1) ... [2023-11-12 00:45:44,412 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:44" (1/1) ... [2023-11-12 00:45:44,420 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:44" (1/1) ... [2023-11-12 00:45:44,425 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:44" (1/1) ... [2023-11-12 00:45:44,432 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:44" (1/1) ... [2023-11-12 00:45:44,434 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:44" (1/1) ... [2023-11-12 00:45:44,436 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:45:44,439 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:45:44,439 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:45:44,440 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:45:44,441 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:44" (1/1) ... [2023-11-12 00:45:44,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:45:44,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:45:44,478 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:45:44,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:45:44,524 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:45:44,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:45:44,524 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:45:44,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:45:44,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:45:44,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:45:44,525 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:45:44,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:45:44,599 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:45:44,601 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:45:44,770 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:45:44,838 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:45:44,849 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-12 00:45:44,854 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:45:44 BoogieIcfgContainer [2023-11-12 00:45:44,854 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:45:44,858 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:45:44,860 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:45:44,864 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:45:44,865 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:45:44" (1/3) ... [2023-11-12 00:45:44,867 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8e86a71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:45:44, skipping insertion in model container [2023-11-12 00:45:44,868 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:44" (2/3) ... [2023-11-12 00:45:44,870 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8e86a71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:45:44, skipping insertion in model container [2023-11-12 00:45:44,870 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:45:44" (3/3) ... [2023-11-12 00:45:44,872 INFO L112 eAbstractionObserver]: Analyzing ICFG init-2-n-u.c [2023-11-12 00:45:44,898 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:45:44,898 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:45:44,963 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:45:44,971 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;@1e5ac6d3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:45:44,972 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:45:44,977 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:45:44,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-12 00:45:44,987 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:44,988 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 00:45:44,989 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:45:44,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:45,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1333010927, now seen corresponding path program 1 times [2023-11-12 00:45:45,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:45,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17776919] [2023-11-12 00:45:45,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:45,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:45,118 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:45:45,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1483378797] [2023-11-12 00:45:45,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:45,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:45,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:45:45,124 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:45:45,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:45:45,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:45,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:45:45,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:45:45,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:45:45,309 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:45:45,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:45:45,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17776919] [2023-11-12 00:45:45,310 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:45:45,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483378797] [2023-11-12 00:45:45,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483378797] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:45:45,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:45:45,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:45:45,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735890116] [2023-11-12 00:45:45,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:45:45,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:45:45,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:45:45,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:45:45,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:45:45,356 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:45:45,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:45:45,410 INFO L93 Difference]: Finished difference Result 19 states and 27 transitions. [2023-11-12 00:45:45,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:45:45,422 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2023-11-12 00:45:45,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:45:45,429 INFO L225 Difference]: With dead ends: 19 [2023-11-12 00:45:45,429 INFO L226 Difference]: Without dead ends: 11 [2023-11-12 00:45:45,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:45:45,436 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:45:45,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 10 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:45:45,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-11-12 00:45:45,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2023-11-12 00:45:45,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:45:45,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2023-11-12 00:45:45,483 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 6 [2023-11-12 00:45:45,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:45:45,484 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2023-11-12 00:45:45,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:45:45,485 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2023-11-12 00:45:45,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-12 00:45:45,485 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:45,485 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:45:45,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:45:45,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 00:45:45,693 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:45:45,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:45,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1031836557, now seen corresponding path program 1 times [2023-11-12 00:45:45,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:45,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341718506] [2023-11-12 00:45:45,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:45,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:45,715 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:45:45,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1882858917] [2023-11-12 00:45:45,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:45,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:45,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:45:45,729 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:45:45,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:45:45,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:45,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:45:45,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:45:45,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:45:45,866 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:45:45,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:45:45,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341718506] [2023-11-12 00:45:45,866 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:45:45,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882858917] [2023-11-12 00:45:45,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882858917] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:45:45,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:45:45,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:45:45,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082415868] [2023-11-12 00:45:45,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:45:45,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:45:45,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:45:45,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:45:45,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:45:45,871 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:45:45,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:45:45,915 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2023-11-12 00:45:45,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:45:45,916 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-12 00:45:45,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:45:45,917 INFO L225 Difference]: With dead ends: 25 [2023-11-12 00:45:45,918 INFO L226 Difference]: Without dead ends: 17 [2023-11-12 00:45:45,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:45:45,920 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:45:45,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 8 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:45:45,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-12 00:45:45,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 12. [2023-11-12 00:45:45,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:45:45,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2023-11-12 00:45:45,933 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 8 [2023-11-12 00:45:45,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:45:45,934 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2023-11-12 00:45:45,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:45:45,935 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2023-11-12 00:45:45,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-12 00:45:45,936 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:45,936 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:45:45,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:45:46,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:46,144 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:45:46,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:46,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1737652549, now seen corresponding path program 1 times [2023-11-12 00:45:46,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:46,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017059889] [2023-11-12 00:45:46,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:46,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:46,160 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:45:46,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1799570177] [2023-11-12 00:45:46,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:46,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:46,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:45:46,163 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:45:46,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:45:46,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:46,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 00:45:46,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:45:46,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:45:46,317 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:45:46,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:45:46,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:45:46,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017059889] [2023-11-12 00:45:46,376 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:45:46,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799570177] [2023-11-12 00:45:46,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799570177] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:45:46,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [715805871] [2023-11-12 00:45:46,404 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-12 00:45:46,404 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:45:46,409 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:45:46,416 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:45:46,416 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:45:47,981 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:45:48,333 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '210#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~C~0#1| 2147483648)) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 2 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) 0)) (<= |ULTIMATE.start_main_~C~0#1| 2147483647) (not (= |ULTIMATE.start_main_#t~mem5#1| |ULTIMATE.start_main_~C~0#1|)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~n~0#1| 1500))' at error location [2023-11-12 00:45:48,333 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:45:48,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:45:48,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-11-12 00:45:48,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870746609] [2023-11-12 00:45:48,334 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:45:48,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 00:45:48,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:45:48,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 00:45:48,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2023-11-12 00:45:48,337 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:45:48,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:45:48,443 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2023-11-12 00:45:48,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:45:48,444 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-12 00:45:48,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:45:48,445 INFO L225 Difference]: With dead ends: 41 [2023-11-12 00:45:48,445 INFO L226 Difference]: Without dead ends: 31 [2023-11-12 00:45:48,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2023-11-12 00:45:48,448 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 66 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:45:48,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 14 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:45:48,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-12 00:45:48,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2023-11-12 00:45:48,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:45:48,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2023-11-12 00:45:48,458 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 9 [2023-11-12 00:45:48,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:45:48,458 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2023-11-12 00:45:48,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:45:48,459 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2023-11-12 00:45:48,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-12 00:45:48,460 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:48,460 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:45:48,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:45:48,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:48,675 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:45:48,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:48,676 INFO L85 PathProgramCache]: Analyzing trace with hash -631783821, now seen corresponding path program 2 times [2023-11-12 00:45:48,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:48,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677124214] [2023-11-12 00:45:48,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:48,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:48,695 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:45:48,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1319383176] [2023-11-12 00:45:48,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:45:48,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:48,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:45:48,700 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:45:48,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:45:48,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 00:45:48,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:45:48,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 00:45:48,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:45:48,850 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 00:45:48,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:45:48,889 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 00:45:48,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:45:48,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677124214] [2023-11-12 00:45:48,890 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:45:48,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319383176] [2023-11-12 00:45:48,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319383176] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:45:48,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [927337308] [2023-11-12 00:45:48,903 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-12 00:45:48,903 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:45:48,903 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:45:48,905 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:45:48,905 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:45:49,388 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:45:49,642 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '389#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~C~0#1| 2147483648)) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 2 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) 0)) (<= |ULTIMATE.start_main_~C~0#1| 2147483647) (not (= |ULTIMATE.start_main_#t~mem5#1| |ULTIMATE.start_main_~C~0#1|)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~n~0#1| 1500))' at error location [2023-11-12 00:45:49,643 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:45:49,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:45:49,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-11-12 00:45:49,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407619334] [2023-11-12 00:45:49,644 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:45:49,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:45:49,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:45:49,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:45:49,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2023-11-12 00:45:49,649 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:45:49,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:45:49,708 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2023-11-12 00:45:49,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:45:49,709 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-12 00:45:49,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:45:49,712 INFO L225 Difference]: With dead ends: 58 [2023-11-12 00:45:49,713 INFO L226 Difference]: Without dead ends: 42 [2023-11-12 00:45:49,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2023-11-12 00:45:49,721 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:45:49,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 13 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:45:49,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-12 00:45:49,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2023-11-12 00:45:49,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 41 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:45:49,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2023-11-12 00:45:49,747 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 12 [2023-11-12 00:45:49,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:45:49,748 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2023-11-12 00:45:49,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:45:49,753 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2023-11-12 00:45:49,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-12 00:45:49,756 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:49,756 INFO L195 NwaCegarLoop]: trace histogram [16, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-12 00:45:49,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:45:49,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:49,964 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:45:49,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:49,970 INFO L85 PathProgramCache]: Analyzing trace with hash -154143079, now seen corresponding path program 3 times [2023-11-12 00:45:49,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:49,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155472600] [2023-11-12 00:45:49,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:49,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:49,992 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:45:49,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [624360980] [2023-11-12 00:45:49,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 00:45:49,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:49,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:45:49,994 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:45:50,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:45:50,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 00:45:50,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:45:50,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 00:45:50,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:45:50,797 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 79 proven. 10 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2023-11-12 00:45:50,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:45:50,890 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 79 proven. 10 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2023-11-12 00:45:50,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:45:50,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155472600] [2023-11-12 00:45:50,891 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:45:50,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624360980] [2023-11-12 00:45:50,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624360980] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:45:50,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1437706551] [2023-11-12 00:45:50,894 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-12 00:45:50,895 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:45:50,895 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:45:50,895 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:45:50,896 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:45:51,288 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:45:51,546 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '750#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~C~0#1| 2147483648)) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 2 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) 0)) (<= |ULTIMATE.start_main_~C~0#1| 2147483647) (not (= |ULTIMATE.start_main_#t~mem5#1| |ULTIMATE.start_main_~C~0#1|)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~n~0#1| 1500))' at error location [2023-11-12 00:45:51,546 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:45:51,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:45:51,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-11-12 00:45:51,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310109753] [2023-11-12 00:45:51,547 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:45:51,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 00:45:51,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:45:51,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 00:45:51,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2023-11-12 00:45:51,549 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:45:51,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:45:51,733 INFO L93 Difference]: Finished difference Result 138 states and 182 transitions. [2023-11-12 00:45:51,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-12 00:45:51,734 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-11-12 00:45:51,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:45:51,735 INFO L225 Difference]: With dead ends: 138 [2023-11-12 00:45:51,735 INFO L226 Difference]: Without dead ends: 103 [2023-11-12 00:45:51,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=226, Invalid=326, Unknown=0, NotChecked=0, Total=552 [2023-11-12 00:45:51,737 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 150 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:45:51,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 32 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:45:51,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-12 00:45:51,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 84. [2023-11-12 00:45:51,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.1927710843373494) internal successors, (99), 83 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:45:51,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 99 transitions. [2023-11-12 00:45:51,755 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 99 transitions. Word has length 30 [2023-11-12 00:45:51,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:45:51,755 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 99 transitions. [2023-11-12 00:45:51,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:45:51,756 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 99 transitions. [2023-11-12 00:45:51,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-12 00:45:51,758 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:51,758 INFO L195 NwaCegarLoop]: trace histogram [40, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-12 00:45:51,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 00:45:51,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:51,966 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:45:51,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:51,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1015265689, now seen corresponding path program 4 times [2023-11-12 00:45:51,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:51,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834753409] [2023-11-12 00:45:51,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:51,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:51,999 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:45:51,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [220632791] [2023-11-12 00:45:51,999 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 00:45:51,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:52,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:45:52,001 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:45:52,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 00:45:52,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:52,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 00:45:52,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:45:52,334 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2023-11-12 00:45:52,334 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:45:52,561 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2023-11-12 00:45:52,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:45:52,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834753409] [2023-11-12 00:45:52,561 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:45:52,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220632791] [2023-11-12 00:45:52,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220632791] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:45:52,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1445612694] [2023-11-12 00:45:52,564 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-12 00:45:52,564 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:45:52,565 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:45:52,565 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:45:52,565 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:45:53,024 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:45:53,117 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1479#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)) (<= 1 |ULTIMATE.start_main_~m~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_#t~mem5#1| |ULTIMATE.start_main_~C~0#1|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2023-11-12 00:45:53,117 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:45:53,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:45:53,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2023-11-12 00:45:53,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131318474] [2023-11-12 00:45:53,118 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:45:53,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-12 00:45:53,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:45:53,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-12 00:45:53,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=605, Unknown=0, NotChecked=0, Total=930 [2023-11-12 00:45:53,121 INFO L87 Difference]: Start difference. First operand 84 states and 99 transitions. Second operand has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:45:53,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:45:53,766 INFO L93 Difference]: Finished difference Result 282 states and 362 transitions. [2023-11-12 00:45:53,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-12 00:45:53,767 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2023-11-12 00:45:53,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:45:53,769 INFO L225 Difference]: With dead ends: 282 [2023-11-12 00:45:53,769 INFO L226 Difference]: Without dead ends: 211 [2023-11-12 00:45:53,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=611, Invalid=1111, Unknown=0, NotChecked=0, Total=1722 [2023-11-12 00:45:53,772 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 478 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:45:53,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [478 Valid, 68 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:45:53,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2023-11-12 00:45:53,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 168. [2023-11-12 00:45:53,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.1676646706586826) internal successors, (195), 167 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:45:53,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 195 transitions. [2023-11-12 00:45:53,800 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 195 transitions. Word has length 54 [2023-11-12 00:45:53,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:45:53,800 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 195 transitions. [2023-11-12 00:45:53,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:45:53,801 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 195 transitions. [2023-11-12 00:45:53,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-12 00:45:53,804 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:53,805 INFO L195 NwaCegarLoop]: trace histogram [88, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-12 00:45:53,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-12 00:45:54,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:54,011 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:45:54,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:54,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1072529511, now seen corresponding path program 5 times [2023-11-12 00:45:54,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:54,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902631570] [2023-11-12 00:45:54,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:54,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:54,077 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:45:54,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [86245570] [2023-11-12 00:45:54,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:45:54,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:54,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:45:54,079 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:45:54,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6bd1871-9e81-4507-9adb-77a202e79e81/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process