./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/init-4-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/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_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/init-4-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/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_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/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 7e1c46a3eec085decec4254bf9381483b25ba7b6541d5728ae52d1793b9b8c91 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:46:42,552 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:46:42,617 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:46:42,622 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:46:42,623 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:46:42,648 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:46:42,648 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:46:42,649 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:46:42,650 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:46:42,651 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:46:42,651 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:46:42,652 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:46:42,652 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:46:42,653 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:46:42,654 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:46:42,654 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:46:42,655 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:46:42,656 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:46:42,656 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:46:42,657 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:46:42,657 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:46:42,661 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:46:42,662 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:46:42,663 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:46:42,663 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:46:42,664 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:46:42,664 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:46:42,665 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:46:42,665 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:46:42,666 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:46:42,667 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:46:42,667 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:46:42,668 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:46:42,668 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:46:42,668 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:46:42,669 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:46:42,669 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:46:42,669 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:46:42,670 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:46:42,670 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:46:42,671 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:46:42,671 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:46:42,672 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:46:42,672 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:46:42,673 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:46:42,673 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_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e1c46a3eec085decec4254bf9381483b25ba7b6541d5728ae52d1793b9b8c91 [2023-11-12 00:46:42,952 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:46:42,979 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:46:42,982 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:46:42,983 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:46:42,984 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:46:42,986 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/array-multidimensional/init-4-n-u.c [2023-11-12 00:46:46,141 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:46:46,374 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:46:46,375 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/sv-benchmarks/c/array-multidimensional/init-4-n-u.c [2023-11-12 00:46:46,383 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/data/6e5ce5b31/f638010f311b46659de1b29cdf6026c2/FLAG6972422a9 [2023-11-12 00:46:46,399 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/data/6e5ce5b31/f638010f311b46659de1b29cdf6026c2 [2023-11-12 00:46:46,401 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:46:46,411 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:46:46,413 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:46:46,413 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:46:46,418 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:46:46,419 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:46:46" (1/1) ... [2023-11-12 00:46:46,420 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c82d0da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:46, skipping insertion in model container [2023-11-12 00:46:46,421 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:46:46" (1/1) ... [2023-11-12 00:46:46,448 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:46:46,594 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_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/sv-benchmarks/c/array-multidimensional/init-4-n-u.c[322,335] [2023-11-12 00:46:46,617 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:46:46,626 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:46:46,636 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_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/sv-benchmarks/c/array-multidimensional/init-4-n-u.c[322,335] [2023-11-12 00:46:46,649 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:46:46,668 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:46:46,668 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:46 WrapperNode [2023-11-12 00:46:46,668 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:46:46,670 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:46:46,670 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:46:46,670 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:46:46,677 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:46" (1/1) ... [2023-11-12 00:46:46,683 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:46" (1/1) ... [2023-11-12 00:46:46,704 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 98 [2023-11-12 00:46:46,705 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:46:46,706 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:46:46,706 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:46:46,706 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:46:46,713 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:46" (1/1) ... [2023-11-12 00:46:46,713 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:46" (1/1) ... [2023-11-12 00:46:46,715 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:46" (1/1) ... [2023-11-12 00:46:46,715 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:46" (1/1) ... [2023-11-12 00:46:46,720 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:46" (1/1) ... [2023-11-12 00:46:46,725 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:46" (1/1) ... [2023-11-12 00:46:46,728 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:46" (1/1) ... [2023-11-12 00:46:46,735 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:46" (1/1) ... [2023-11-12 00:46:46,738 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:46:46,739 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:46:46,739 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:46:46,739 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:46:46,740 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:46" (1/1) ... [2023-11-12 00:46:46,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:46:46,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:46:46,785 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:46:46,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:46:46,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:46:46,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:46:46,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:46:46,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:46:46,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:46:46,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:46:46,827 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:46:46,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:46:46,902 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:46:46,904 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:46:47,091 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:46:47,183 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:46:47,184 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-11-12 00:46:47,189 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:46:47 BoogieIcfgContainer [2023-11-12 00:46:47,189 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:46:47,192 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:46:47,192 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:46:47,197 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:46:47,198 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:46:46" (1/3) ... [2023-11-12 00:46:47,200 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b0e5bf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:46:47, skipping insertion in model container [2023-11-12 00:46:47,200 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:46" (2/3) ... [2023-11-12 00:46:47,201 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b0e5bf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:46:47, skipping insertion in model container [2023-11-12 00:46:47,201 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:46:47" (3/3) ... [2023-11-12 00:46:47,202 INFO L112 eAbstractionObserver]: Analyzing ICFG init-4-n-u.c [2023-11-12 00:46:47,223 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:46:47,223 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:46:47,273 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:46:47,280 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;@4d0cf6d8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:46:47,280 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:46:47,285 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.8333333333333333) 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 00:46:47,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-12 00:46:47,292 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:47,293 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:46:47,294 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:47,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:47,304 INFO L85 PathProgramCache]: Analyzing trace with hash 13546752, now seen corresponding path program 1 times [2023-11-12 00:46:47,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:47,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553304063] [2023-11-12 00:46:47,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:47,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:47,402 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:46:47,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [633812291] [2023-11-12 00:46:47,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:47,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:47,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:46:47,408 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:46:47,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:46:47,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:47,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:46:47,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:46:47,575 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 00:46:47,575 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:46:47,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:47,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553304063] [2023-11-12 00:46:47,576 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:46:47,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633812291] [2023-11-12 00:46:47,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633812291] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:46:47,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:46:47,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:46:47,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915745265] [2023-11-12 00:46:47,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:46:47,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:46:47,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:47,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:46:47,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:46:47,619 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.8333333333333333) 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) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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 00:46:47,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:47,679 INFO L93 Difference]: Finished difference Result 27 states and 43 transitions. [2023-11-12 00:46:47,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:46:47,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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 00:46:47,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:47,692 INFO L225 Difference]: With dead ends: 27 [2023-11-12 00:46:47,692 INFO L226 Difference]: Without dead ends: 17 [2023-11-12 00:46:47,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 00:46:47,704 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:47,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 18 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:46:47,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-12 00:46:47,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2023-11-12 00:46:47,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 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) [2023-11-12 00:46:47,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 21 transitions. [2023-11-12 00:46:47,743 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 21 transitions. Word has length 8 [2023-11-12 00:46:47,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:47,743 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 21 transitions. [2023-11-12 00:46:47,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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 00:46:47,744 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 21 transitions. [2023-11-12 00:46:47,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-12 00:46:47,744 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:47,744 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:46:47,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:46:47,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:47,948 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:47,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:47,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1568153430, now seen corresponding path program 1 times [2023-11-12 00:46:47,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:47,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514185049] [2023-11-12 00:46:47,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:47,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:47,962 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:46:47,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [284898647] [2023-11-12 00:46:47,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:47,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:47,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:46:47,964 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:46:48,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:46:48,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:48,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:46:48,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:46:48,154 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 00:46:48,154 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:46:48,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:48,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514185049] [2023-11-12 00:46:48,156 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:46:48,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284898647] [2023-11-12 00:46:48,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284898647] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:46:48,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:46:48,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:46:48,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977213966] [2023-11-12 00:46:48,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:46:48,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:46:48,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:48,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:46:48,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:46:48,162 INFO L87 Difference]: Start difference. First operand 14 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2023-11-12 00:46:48,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:48,250 INFO L93 Difference]: Finished difference Result 37 states and 57 transitions. [2023-11-12 00:46:48,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:46:48,251 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 [2023-11-12 00:46:48,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:48,254 INFO L225 Difference]: With dead ends: 37 [2023-11-12 00:46:48,254 INFO L226 Difference]: Without dead ends: 25 [2023-11-12 00:46:48,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 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 00:46:48,257 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 30 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:48,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 14 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:46:48,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-12 00:46:48,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 16. [2023-11-12 00:46:48,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:48,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 23 transitions. [2023-11-12 00:46:48,273 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 23 transitions. Word has length 10 [2023-11-12 00:46:48,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:48,273 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 23 transitions. [2023-11-12 00:46:48,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2023-11-12 00:46:48,274 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 23 transitions. [2023-11-12 00:46:48,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-12 00:46:48,275 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:48,275 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:46:48,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:46:48,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:48,482 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:48,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:48,483 INFO L85 PathProgramCache]: Analyzing trace with hash -2004524003, now seen corresponding path program 1 times [2023-11-12 00:46:48,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:48,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927310032] [2023-11-12 00:46:48,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:48,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:48,498 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:46:48,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [666548194] [2023-11-12 00:46:48,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:48,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:48,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:46:48,506 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:46:48,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:46:48,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:48,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:46:48,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:46:48,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:46:48,644 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:46:48,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:48,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927310032] [2023-11-12 00:46:48,645 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:46:48,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666548194] [2023-11-12 00:46:48,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666548194] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:46:48,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:46:48,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:46:48,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259302344] [2023-11-12 00:46:48,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:46:48,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:46:48,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:48,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:46:48,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:46:48,649 INFO L87 Difference]: Start difference. First operand 16 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:48,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:48,728 INFO L93 Difference]: Finished difference Result 39 states and 57 transitions. [2023-11-12 00:46:48,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:46:48,728 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-12 00:46:48,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:48,730 INFO L225 Difference]: With dead ends: 39 [2023-11-12 00:46:48,730 INFO L226 Difference]: Without dead ends: 25 [2023-11-12 00:46:48,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 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 00:46:48,735 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 37 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:48,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 12 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:46:48,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-12 00:46:48,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 18. [2023-11-12 00:46:48,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 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 00:46:48,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2023-11-12 00:46:48,756 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 12 [2023-11-12 00:46:48,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:48,759 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2023-11-12 00:46:48,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:48,760 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2023-11-12 00:46:48,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-12 00:46:48,761 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:48,761 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:46:48,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:46:48,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:48,972 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:48,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:48,973 INFO L85 PathProgramCache]: Analyzing trace with hash -861837233, now seen corresponding path program 1 times [2023-11-12 00:46:48,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:48,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961048303] [2023-11-12 00:46:48,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:48,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:48,995 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:46:49,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1373164976] [2023-11-12 00:46:49,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:49,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:49,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:46:49,003 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:46:49,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:46:49,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:49,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:46:49,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:46:49,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:46:49,099 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:46:49,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:49,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961048303] [2023-11-12 00:46:49,100 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:46:49,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373164976] [2023-11-12 00:46:49,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373164976] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:46:49,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:46:49,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:46:49,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397590669] [2023-11-12 00:46:49,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:46:49,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:46:49,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:49,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:46:49,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:46:49,106 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 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 00:46:49,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:49,174 INFO L93 Difference]: Finished difference Result 41 states and 57 transitions. [2023-11-12 00:46:49,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:46:49,175 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-12 00:46:49,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:49,176 INFO L225 Difference]: With dead ends: 41 [2023-11-12 00:46:49,176 INFO L226 Difference]: Without dead ends: 25 [2023-11-12 00:46:49,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 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 00:46:49,185 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:49,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 12 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:46:49,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-12 00:46:49,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2023-11-12 00:46:49,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:49,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 27 transitions. [2023-11-12 00:46:49,199 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 27 transitions. Word has length 14 [2023-11-12 00:46:49,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:49,200 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 27 transitions. [2023-11-12 00:46:49,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 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 00:46:49,200 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 27 transitions. [2023-11-12 00:46:49,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-12 00:46:49,201 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:49,201 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:46:49,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:46:49,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:49,415 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:49,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:49,416 INFO L85 PathProgramCache]: Analyzing trace with hash 463627935, now seen corresponding path program 1 times [2023-11-12 00:46:49,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:49,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98642924] [2023-11-12 00:46:49,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:49,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:49,428 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:46:49,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1759834464] [2023-11-12 00:46:49,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:49,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:49,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:46:49,430 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:46:49,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:46:49,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:49,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 00:46:49,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:46:49,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:46:49,555 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:46:49,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:46:49,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:49,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98642924] [2023-11-12 00:46:49,592 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:46:49,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759834464] [2023-11-12 00:46:49,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759834464] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:46:49,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [54240805] [2023-11-12 00:46:49,617 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-11-12 00:46:49,617 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:46:49,621 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:46:49,627 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:46:49,628 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:46:51,425 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:46:51,660 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '598#(and (<= 1 |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_main_~q~0#1|) (= |ULTIMATE.start_main_~l~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) (= |ULTIMATE.start_main_~k~0#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 00:46:51,660 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:46:51,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:46:51,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-11-12 00:46:51,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232394756] [2023-11-12 00:46:51,661 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:46:51,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 00:46:51,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:51,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 00:46:51,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2023-11-12 00:46:51,663 INFO L87 Difference]: Start difference. First operand 20 states and 27 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 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) [2023-11-12 00:46:51,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:51,782 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2023-11-12 00:46:51,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:46:51,782 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 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) Word has length 15 [2023-11-12 00:46:51,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:51,783 INFO L225 Difference]: With dead ends: 57 [2023-11-12 00:46:51,783 INFO L226 Difference]: Without dead ends: 39 [2023-11-12 00:46:51,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2023-11-12 00:46:51,785 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 70 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:51,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 18 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:46:51,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-12 00:46:51,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2023-11-12 00:46:51,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 states have internal predecessors, (42), 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 00:46:51,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2023-11-12 00:46:51,797 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 15 [2023-11-12 00:46:51,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:51,798 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2023-11-12 00:46:51,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 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) [2023-11-12 00:46:51,798 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2023-11-12 00:46:51,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-12 00:46:51,799 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:51,799 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:46:51,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 00:46:52,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:52,006 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:52,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:52,007 INFO L85 PathProgramCache]: Analyzing trace with hash 68582479, now seen corresponding path program 2 times [2023-11-12 00:46:52,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:52,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147367373] [2023-11-12 00:46:52,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:52,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:52,020 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:46:52,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [280401779] [2023-11-12 00:46:52,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:46:52,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:52,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:46:52,022 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:46:52,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 00:46:52,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 00:46:52,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:46:52,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 00:46:52,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:46:52,146 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 00:46:52,147 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:46:52,183 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 00:46:52,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:52,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147367373] [2023-11-12 00:46:52,184 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:46:52,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280401779] [2023-11-12 00:46:52,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280401779] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:46:52,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1213020842] [2023-11-12 00:46:52,187 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-11-12 00:46:52,188 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:46:52,188 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:46:52,188 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:46:52,188 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:46:53,437 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:46:53,652 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '863#(and (<= 1 |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_main_~q~0#1|) (= |ULTIMATE.start_main_~l~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) (= |ULTIMATE.start_main_~k~0#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 00:46:53,652 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:46:53,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:46:53,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-11-12 00:46:53,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474812237] [2023-11-12 00:46:53,653 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:46:53,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:46:53,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:53,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:46:53,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-11-12 00:46:53,654 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:53,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:53,730 INFO L93 Difference]: Finished difference Result 82 states and 110 transitions. [2023-11-12 00:46:53,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:46:53,731 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 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 18 [2023-11-12 00:46:53,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:53,735 INFO L225 Difference]: With dead ends: 82 [2023-11-12 00:46:53,735 INFO L226 Difference]: Without dead ends: 62 [2023-11-12 00:46:53,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-11-12 00:46:53,736 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 21 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:53,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 27 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:46:53,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-12 00:46:53,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-11-12 00:46:53,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.3278688524590163) internal successors, (81), 61 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) [2023-11-12 00:46:53,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 81 transitions. [2023-11-12 00:46:53,766 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 81 transitions. Word has length 18 [2023-11-12 00:46:53,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:53,766 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 81 transitions. [2023-11-12 00:46:53,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:53,767 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 81 transitions. [2023-11-12 00:46:53,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-12 00:46:53,769 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:53,769 INFO L195 NwaCegarLoop]: trace histogram [16, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:46:53,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-12 00:46:53,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:53,980 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:53,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:53,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1401026116, now seen corresponding path program 3 times [2023-11-12 00:46:53,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:53,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618871412] [2023-11-12 00:46:53,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:53,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:54,000 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:46:54,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [872736892] [2023-11-12 00:46:54,000 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 00:46:54,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:54,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:46:54,002 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:46:54,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 00:46:55,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 00:46:55,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:46:55,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 00:46:55,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:46:55,973 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 93 proven. 10 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-11-12 00:46:55,973 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:46:56,053 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 93 proven. 10 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-11-12 00:46:56,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:56,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618871412] [2023-11-12 00:46:56,054 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:46:56,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872736892] [2023-11-12 00:46:56,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872736892] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:46:56,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1082637891] [2023-11-12 00:46:56,060 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-11-12 00:46:56,060 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:46:56,060 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:46:56,061 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:46:56,062 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:46:57,188 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:46:57,421 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1423#(and (<= 1 |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_main_~q~0#1|) (= |ULTIMATE.start_main_~l~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) (= |ULTIMATE.start_main_~k~0#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 00:46:57,421 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:46:57,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:46:57,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-11-12 00:46:57,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416915757] [2023-11-12 00:46:57,422 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:46:57,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 00:46:57,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:57,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 00:46:57,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2023-11-12 00:46:57,424 INFO L87 Difference]: Start difference. First operand 62 states and 81 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 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 00:46:57,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:57,681 INFO L93 Difference]: Finished difference Result 182 states and 247 transitions. [2023-11-12 00:46:57,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-12 00:46:57,682 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 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 48 [2023-11-12 00:46:57,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:57,684 INFO L225 Difference]: With dead ends: 182 [2023-11-12 00:46:57,684 INFO L226 Difference]: Without dead ends: 123 [2023-11-12 00:46:57,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2023-11-12 00:46:57,687 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 180 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:57,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 36 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:46:57,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-11-12 00:46:57,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 104. [2023-11-12 00:46:57,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.2524271844660195) internal successors, (129), 103 states have internal predecessors, (129), 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 00:46:57,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 129 transitions. [2023-11-12 00:46:57,734 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 129 transitions. Word has length 48 [2023-11-12 00:46:57,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:57,735 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 129 transitions. [2023-11-12 00:46:57,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 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 00:46:57,735 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 129 transitions. [2023-11-12 00:46:57,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-12 00:46:57,739 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:57,740 INFO L195 NwaCegarLoop]: trace histogram [40, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:46:57,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 00:46:57,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:57,956 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:57,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:57,956 INFO L85 PathProgramCache]: Analyzing trace with hash -102083012, now seen corresponding path program 4 times [2023-11-12 00:46:57,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:57,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592437818] [2023-11-12 00:46:57,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:57,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:58,001 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:46:58,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1697855310] [2023-11-12 00:46:58,001 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 00:46:58,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:58,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:46:58,003 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:46:58,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 00:46:58,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:58,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 00:46:58,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:46:58,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 381 proven. 55 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2023-11-12 00:46:58,370 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:46:58,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 381 proven. 55 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2023-11-12 00:46:58,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:58,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592437818] [2023-11-12 00:46:58,611 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:46:58,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697855310] [2023-11-12 00:46:58,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697855310] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:46:58,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [576649848] [2023-11-12 00:46:58,614 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-11-12 00:46:58,614 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:46:58,614 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:46:58,614 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:46:58,615 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:46:59,519 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:46:59,698 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2391#(and (<= 1 |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_main_~q~0#1|) (= |ULTIMATE.start_main_~l~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) (= |ULTIMATE.start_main_~k~0#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 00:46:59,699 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:46:59,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:46:59,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2023-11-12 00:46:59,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164093374] [2023-11-12 00:46:59,699 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:46:59,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-12 00:46:59,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:59,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-12 00:46:59,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2023-11-12 00:46:59,702 INFO L87 Difference]: Start difference. First operand 104 states and 129 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 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 00:47:00,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:00,295 INFO L93 Difference]: Finished difference Result 332 states and 433 transitions. [2023-11-12 00:47:00,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-12 00:47:00,296 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 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 72 [2023-11-12 00:47:00,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:00,298 INFO L225 Difference]: With dead ends: 332 [2023-11-12 00:47:00,298 INFO L226 Difference]: Without dead ends: 231 [2023-11-12 00:47:00,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=625, Invalid=1267, Unknown=0, NotChecked=0, Total=1892 [2023-11-12 00:47:00,301 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 369 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:00,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 72 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:47:00,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2023-11-12 00:47:00,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 188. [2023-11-12 00:47:00,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.2032085561497325) internal successors, (225), 187 states have internal predecessors, (225), 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 00:47:00,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 225 transitions. [2023-11-12 00:47:00,338 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 225 transitions. Word has length 72 [2023-11-12 00:47:00,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:00,338 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 225 transitions. [2023-11-12 00:47:00,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 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 00:47:00,339 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 225 transitions. [2023-11-12 00:47:00,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-11-12 00:47:00,341 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:00,341 INFO L195 NwaCegarLoop]: trace histogram [88, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:47:00,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 00:47:00,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:00,549 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:00,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:00,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1739501764, now seen corresponding path program 5 times [2023-11-12 00:47:00,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:00,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365073821] [2023-11-12 00:47:00,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:00,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:00,601 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:47:00,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1753338042] [2023-11-12 00:47:00,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:47:00,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:00,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:47:00,603 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:47:00,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cf7682e-813e-4a88-99d7-2eb2ab284e0d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process