./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copy5_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copy5_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire --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 0541c5d3cb2bb522edbd5a6d03bcb344a1d82e4bcd281d695c3c7a0d3bc33956 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:35:58,947 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:35:59,045 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 20:35:59,052 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:35:59,052 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:35:59,099 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:35:59,100 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:35:59,101 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:35:59,102 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:35:59,102 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:35:59,103 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:35:59,104 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:35:59,104 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:35:59,105 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:35:59,105 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:35:59,106 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:35:59,107 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:35:59,107 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:35:59,108 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:35:59,108 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:35:59,109 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:35:59,110 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:35:59,111 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:35:59,112 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:35:59,112 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:35:59,113 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:35:59,113 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:35:59,114 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:35:59,115 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:35:59,115 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:35:59,116 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:35:59,116 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:35:59,117 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:35:59,132 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:35:59,132 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:35:59,133 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:35:59,133 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:35:59,134 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:35:59,134 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:35:59,134 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:35:59,135 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:35:59,135 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:35:59,136 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:35:59,136 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:35:59,136 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:35:59,136 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:35:59,136 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:35:59,137 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_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0541c5d3cb2bb522edbd5a6d03bcb344a1d82e4bcd281d695c3c7a0d3bc33956 [2023-11-23 20:35:59,448 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:35:59,483 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:35:59,487 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:35:59,490 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:35:59,491 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:35:59,492 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/array-examples/standard_copy5_ground-2.i [2023-11-23 20:36:02,607 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:36:02,863 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:36:02,864 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/sv-benchmarks/c/array-examples/standard_copy5_ground-2.i [2023-11-23 20:36:02,871 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/data/e0b33e5cc/6f3df7df18a14c879dff32ee8404c1e4/FLAG154002e98 [2023-11-23 20:36:02,886 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/data/e0b33e5cc/6f3df7df18a14c879dff32ee8404c1e4 [2023-11-23 20:36:02,889 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:36:02,890 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:36:02,892 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:36:02,892 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:36:02,897 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:36:02,898 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:36:02" (1/1) ... [2023-11-23 20:36:02,899 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@625ccec7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:02, skipping insertion in model container [2023-11-23 20:36:02,900 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:36:02" (1/1) ... [2023-11-23 20:36:02,923 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:36:03,080 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_5379eff7-3a9d-4411-9f21-c6079372215b/sv-benchmarks/c/array-examples/standard_copy5_ground-2.i[816,829] [2023-11-23 20:36:03,100 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:36:03,109 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:36:03,121 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_5379eff7-3a9d-4411-9f21-c6079372215b/sv-benchmarks/c/array-examples/standard_copy5_ground-2.i[816,829] [2023-11-23 20:36:03,134 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:36:03,150 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:36:03,150 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:03 WrapperNode [2023-11-23 20:36:03,151 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:36:03,152 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:36:03,152 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:36:03,152 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:36:03,160 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:03" (1/1) ... [2023-11-23 20:36:03,168 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:03" (1/1) ... [2023-11-23 20:36:03,193 INFO L138 Inliner]: procedures = 16, calls = 39, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 132 [2023-11-23 20:36:03,194 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:36:03,195 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:36:03,195 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:36:03,195 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:36:03,204 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:03" (1/1) ... [2023-11-23 20:36:03,205 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:03" (1/1) ... [2023-11-23 20:36:03,208 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:03" (1/1) ... [2023-11-23 20:36:03,208 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:03" (1/1) ... [2023-11-23 20:36:03,217 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:03" (1/1) ... [2023-11-23 20:36:03,222 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:03" (1/1) ... [2023-11-23 20:36:03,224 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:03" (1/1) ... [2023-11-23 20:36:03,225 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:03" (1/1) ... [2023-11-23 20:36:03,228 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:36:03,229 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:36:03,230 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:36:03,230 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:36:03,231 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:03" (1/1) ... [2023-11-23 20:36:03,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:36:03,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:03,265 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:36:03,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:36:03,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:36:03,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:36:03,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 20:36:03,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 20:36:03,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:36:03,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:36:03,307 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 20:36:03,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 20:36:03,389 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:36:03,392 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:36:03,659 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:36:03,758 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:36:03,762 INFO L309 CfgBuilder]: Removed 7 assume(true) statements. [2023-11-23 20:36:03,764 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:36:03 BoogieIcfgContainer [2023-11-23 20:36:03,764 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:36:03,766 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:36:03,769 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:36:03,773 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:36:03,773 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:36:02" (1/3) ... [2023-11-23 20:36:03,774 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f941e7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:36:03, skipping insertion in model container [2023-11-23 20:36:03,775 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:03" (2/3) ... [2023-11-23 20:36:03,777 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f941e7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:36:03, skipping insertion in model container [2023-11-23 20:36:03,778 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:36:03" (3/3) ... [2023-11-23 20:36:03,779 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy5_ground-2.i [2023-11-23 20:36:03,793 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:36:03,794 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 20:36:03,835 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:36:03,842 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;@1f89f04, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:36:03,842 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 20:36:03,850 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:36:03,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-23 20:36:03,856 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:03,857 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:03,857 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:03,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:03,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1252515093, now seen corresponding path program 1 times [2023-11-23 20:36:03,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:03,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609497629] [2023-11-23 20:36:03,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:03,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:03,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:04,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:36:04,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:04,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609497629] [2023-11-23 20:36:04,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609497629] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:04,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:04,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 20:36:04,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507966620] [2023-11-23 20:36:04,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:04,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:36:04,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:04,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:36:04,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:36:04,160 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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) [2023-11-23 20:36:04,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:04,220 INFO L93 Difference]: Finished difference Result 25 states and 39 transitions. [2023-11-23 20:36:04,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:36:04,223 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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 [2023-11-23 20:36:04,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:04,231 INFO L225 Difference]: With dead ends: 25 [2023-11-23 20:36:04,231 INFO L226 Difference]: Without dead ends: 13 [2023-11-23 20:36:04,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:36:04,238 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:04,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 20:36:04,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-11-23 20:36:04,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-11-23 20:36:04,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:36:04,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 19 transitions. [2023-11-23 20:36:04,275 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 19 transitions. Word has length 10 [2023-11-23 20:36:04,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:04,276 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 19 transitions. [2023-11-23 20:36:04,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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) [2023-11-23 20:36:04,276 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 19 transitions. [2023-11-23 20:36:04,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-23 20:36:04,277 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:04,277 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:04,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:36:04,278 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:04,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:04,279 INFO L85 PathProgramCache]: Analyzing trace with hash 881812293, now seen corresponding path program 1 times [2023-11-23 20:36:04,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:04,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955562991] [2023-11-23 20:36:04,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:04,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:04,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:04,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:36:04,445 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:04,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955562991] [2023-11-23 20:36:04,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955562991] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:36:04,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553834761] [2023-11-23 20:36:04,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:04,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:04,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:04,448 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:36:04,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:36:04,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:04,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 20:36:04,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:04,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 20:36:04,578 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:36:04,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553834761] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:04,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:36:04,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-23 20:36:04,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142191995] [2023-11-23 20:36:04,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:04,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:36:04,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:04,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:36:04,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:36:04,582 INFO L87 Difference]: Start difference. First operand 13 states and 19 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2023-11-23 20:36:04,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:04,669 INFO L93 Difference]: Finished difference Result 27 states and 42 transitions. [2023-11-23 20:36:04,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:36:04,670 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-23 20:36:04,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:04,671 INFO L225 Difference]: With dead ends: 27 [2023-11-23 20:36:04,671 INFO L226 Difference]: Without dead ends: 18 [2023-11-23 20:36:04,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:36:04,673 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:04,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:36:04,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-23 20:36:04,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-11-23 20:36:04,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2023-11-23 20:36:04,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2023-11-23 20:36:04,679 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 11 [2023-11-23 20:36:04,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:04,679 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2023-11-23 20:36:04,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2023-11-23 20:36:04,680 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2023-11-23 20:36:04,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-23 20:36:04,681 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:04,681 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:04,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-23 20:36:04,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:04,900 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:04,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:04,901 INFO L85 PathProgramCache]: Analyzing trace with hash -621352897, now seen corresponding path program 1 times [2023-11-23 20:36:04,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:04,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143576627] [2023-11-23 20:36:04,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:04,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:04,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:05,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 20:36:05,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:05,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143576627] [2023-11-23 20:36:05,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143576627] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:36:05,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515206750] [2023-11-23 20:36:05,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:05,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:05,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:05,132 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:36:05,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 20:36:05,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:05,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:36:05,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:05,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 20:36:05,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:36:05,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 20:36:05,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515206750] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:36:05,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1348193272] [2023-11-23 20:36:05,400 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-23 20:36:05,401 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:36:05,405 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:36:05,411 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:36:05,411 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:36:06,988 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:36:07,436 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '287#(and (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a6~0#1.base|) 0)) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_#t~mem16#1| |ULTIMATE.start_main_#t~mem15#1|)) (<= 2 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem15#1|))' at error location [2023-11-23 20:36:07,437 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 20:36:07,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:36:07,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-23 20:36:07,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839520118] [2023-11-23 20:36:07,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 20:36:07,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 20:36:07,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:07,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 20:36:07,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-23 20:36:07,443 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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) [2023-11-23 20:36:07,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:07,507 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2023-11-23 20:36:07,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 20:36:07,508 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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 16 [2023-11-23 20:36:07,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:07,510 INFO L225 Difference]: With dead ends: 36 [2023-11-23 20:36:07,511 INFO L226 Difference]: Without dead ends: 21 [2023-11-23 20:36:07,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-23 20:36:07,515 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:07,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 20:36:07,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-23 20:36:07,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-23 20:36:07,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.35) internal successors, (27), 20 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) [2023-11-23 20:36:07,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2023-11-23 20:36:07,532 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 16 [2023-11-23 20:36:07,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:07,532 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2023-11-23 20:36:07,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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) [2023-11-23 20:36:07,533 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2023-11-23 20:36:07,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-23 20:36:07,534 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:07,534 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:07,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 20:36:07,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-23 20:36:07,748 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:07,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:07,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1509963303, now seen corresponding path program 2 times [2023-11-23 20:36:07,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:07,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103911390] [2023-11-23 20:36:07,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:07,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:07,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:07,846 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-23 20:36:07,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:07,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103911390] [2023-11-23 20:36:07,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103911390] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:36:07,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231881239] [2023-11-23 20:36:07,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 20:36:07,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:07,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:07,849 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:36:07,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 20:36:07,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-23 20:36:07,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 20:36:07,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:36:07,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:07,977 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-23 20:36:07,977 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:36:07,994 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-23 20:36:07,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231881239] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:36:07,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [228072399] [2023-11-23 20:36:07,999 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-23 20:36:08,000 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:36:08,000 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:36:08,001 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:36:08,001 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:36:08,829 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:36:09,292 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '507#(and (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a6~0#1.base|) 0)) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_#t~mem16#1| |ULTIMATE.start_main_#t~mem15#1|)) (<= 2 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem15#1|))' at error location [2023-11-23 20:36:09,292 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 20:36:09,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:36:09,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-23 20:36:09,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990865625] [2023-11-23 20:36:09,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 20:36:09,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 20:36:09,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:09,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 20:36:09,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-23 20:36:09,294 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 7 states, 7 states have (on average 3.0) 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) [2023-11-23 20:36:09,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:09,400 INFO L93 Difference]: Finished difference Result 49 states and 74 transitions. [2023-11-23 20:36:09,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 20:36:09,400 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) 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 19 [2023-11-23 20:36:09,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:09,402 INFO L225 Difference]: With dead ends: 49 [2023-11-23 20:36:09,402 INFO L226 Difference]: Without dead ends: 36 [2023-11-23 20:36:09,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-23 20:36:09,407 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:09,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:36:09,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-23 20:36:09,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-11-23 20:36:09,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 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) [2023-11-23 20:36:09,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2023-11-23 20:36:09,422 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 19 [2023-11-23 20:36:09,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:09,422 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2023-11-23 20:36:09,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) 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) [2023-11-23 20:36:09,423 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2023-11-23 20:36:09,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-23 20:36:09,425 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:09,425 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:09,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 20:36:09,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:09,640 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:09,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:09,640 INFO L85 PathProgramCache]: Analyzing trace with hash 349675115, now seen corresponding path program 3 times [2023-11-23 20:36:09,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:09,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710691089] [2023-11-23 20:36:09,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:09,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:09,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:09,889 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-23 20:36:09,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:09,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710691089] [2023-11-23 20:36:09,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710691089] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:36:09,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428956698] [2023-11-23 20:36:09,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 20:36:09,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:09,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:09,894 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:36:09,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 20:36:10,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 20:36:10,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 20:36:10,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 20:36:10,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:10,055 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-23 20:36:10,055 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:36:10,114 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-23 20:36:10,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428956698] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:36:10,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1816114990] [2023-11-23 20:36:10,118 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-23 20:36:10,119 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:36:10,119 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:36:10,119 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:36:10,120 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:36:10,840 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:36:11,366 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '879#(and (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a6~0#1.base|) 0)) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_#t~mem16#1| |ULTIMATE.start_main_#t~mem15#1|)) (<= 2 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem15#1|))' at error location [2023-11-23 20:36:11,366 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 20:36:11,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:36:11,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-23 20:36:11,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24476892] [2023-11-23 20:36:11,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 20:36:11,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-23 20:36:11,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:11,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-23 20:36:11,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2023-11-23 20:36:11,368 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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) [2023-11-23 20:36:11,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:11,436 INFO L93 Difference]: Finished difference Result 72 states and 89 transitions. [2023-11-23 20:36:11,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 20:36:11,437 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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) Word has length 34 [2023-11-23 20:36:11,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:11,437 INFO L225 Difference]: With dead ends: 72 [2023-11-23 20:36:11,438 INFO L226 Difference]: Without dead ends: 42 [2023-11-23 20:36:11,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 85 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2023-11-23 20:36:11,439 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:11,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:36:11,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-23 20:36:11,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2023-11-23 20:36:11,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.170731707317073) internal successors, (48), 41 states have internal predecessors, (48), 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) [2023-11-23 20:36:11,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2023-11-23 20:36:11,446 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 34 [2023-11-23 20:36:11,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:11,447 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2023-11-23 20:36:11,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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) [2023-11-23 20:36:11,447 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2023-11-23 20:36:11,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-23 20:36:11,448 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:11,449 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:11,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 20:36:11,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:11,665 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:11,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:11,666 INFO L85 PathProgramCache]: Analyzing trace with hash 96014379, now seen corresponding path program 4 times [2023-11-23 20:36:11,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:11,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745572145] [2023-11-23 20:36:11,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:11,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:11,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:12,066 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-23 20:36:12,066 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:12,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745572145] [2023-11-23 20:36:12,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745572145] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:36:12,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900433107] [2023-11-23 20:36:12,069 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-23 20:36:12,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:12,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:12,072 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:36:12,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 20:36:12,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:12,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 20:36:12,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:12,279 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-23 20:36:12,279 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:36:12,503 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-23 20:36:12,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900433107] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:36:12,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2103445598] [2023-11-23 20:36:12,506 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-23 20:36:12,506 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:36:12,507 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:36:12,507 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:36:12,507 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:36:13,175 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:36:13,797 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1357#(and (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a6~0#1.base|) 0)) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_#t~mem16#1| |ULTIMATE.start_main_#t~mem15#1|)) (<= 2 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem15#1|))' at error location [2023-11-23 20:36:13,797 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 20:36:13,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:36:13,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-11-23 20:36:13,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588447524] [2023-11-23 20:36:13,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 20:36:13,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-23 20:36:13,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:13,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-23 20:36:13,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2023-11-23 20:36:13,800 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:36:13,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:13,903 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2023-11-23 20:36:13,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-23 20:36:13,904 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-11-23 20:36:13,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:13,905 INFO L225 Difference]: With dead ends: 84 [2023-11-23 20:36:13,905 INFO L226 Difference]: Without dead ends: 54 [2023-11-23 20:36:13,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 92 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2023-11-23 20:36:13,907 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:13,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:36:13,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-23 20:36:13,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-11-23 20:36:13,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 53 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:36:13,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2023-11-23 20:36:13,915 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 40 [2023-11-23 20:36:13,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:13,915 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2023-11-23 20:36:13,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:36:13,916 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2023-11-23 20:36:13,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-23 20:36:13,917 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:13,918 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:13,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 20:36:14,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:14,140 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:14,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:14,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1238170709, now seen corresponding path program 5 times [2023-11-23 20:36:14,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:14,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40248231] [2023-11-23 20:36:14,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:14,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:14,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:15,022 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-23 20:36:15,023 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:15,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40248231] [2023-11-23 20:36:15,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40248231] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:36:15,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790736053] [2023-11-23 20:36:15,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 20:36:15,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:15,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:15,028 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:36:15,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 20:36:15,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-23 20:36:15,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 20:36:15,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 20:36:15,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:15,425 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2023-11-23 20:36:15,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:36:15,538 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2023-11-23 20:36:15,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790736053] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:36:15,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [234875327] [2023-11-23 20:36:15,544 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-23 20:36:15,544 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:36:15,544 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:36:15,545 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:36:15,545 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:36:16,234 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:36:16,775 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1965#(and (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a6~0#1.base|) 0)) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_#t~mem16#1| |ULTIMATE.start_main_#t~mem15#1|)) (<= 2 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem15#1|))' at error location [2023-11-23 20:36:16,775 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 20:36:16,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:36:16,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2023-11-23 20:36:16,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086954846] [2023-11-23 20:36:16,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 20:36:16,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-23 20:36:16,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:16,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-23 20:36:16,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2023-11-23 20:36:16,785 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 35 states have internal predecessors, (55), 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) [2023-11-23 20:36:17,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:17,067 INFO L93 Difference]: Finished difference Result 115 states and 157 transitions. [2023-11-23 20:36:17,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-23 20:36:17,068 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 35 states have internal predecessors, (55), 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 52 [2023-11-23 20:36:17,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:17,069 INFO L225 Difference]: With dead ends: 115 [2023-11-23 20:36:17,069 INFO L226 Difference]: Without dead ends: 85 [2023-11-23 20:36:17,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2023-11-23 20:36:17,072 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:17,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:36:17,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-23 20:36:17,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2023-11-23 20:36:17,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0833333333333333) internal successors, (91), 84 states have internal predecessors, (91), 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) [2023-11-23 20:36:17,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 91 transitions. [2023-11-23 20:36:17,083 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 91 transitions. Word has length 52 [2023-11-23 20:36:17,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:17,084 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 91 transitions. [2023-11-23 20:36:17,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 35 states have internal predecessors, (55), 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) [2023-11-23 20:36:17,084 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 91 transitions. [2023-11-23 20:36:17,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-23 20:36:17,086 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:17,087 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:17,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 20:36:17,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-23 20:36:17,288 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:17,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:17,288 INFO L85 PathProgramCache]: Analyzing trace with hash 2047000965, now seen corresponding path program 6 times [2023-11-23 20:36:17,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:17,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514692334] [2023-11-23 20:36:17,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:17,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:17,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:18,530 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-11-23 20:36:18,530 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:18,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514692334] [2023-11-23 20:36:18,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514692334] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:36:18,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825220461] [2023-11-23 20:36:18,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 20:36:18,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:18,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:18,533 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:36:18,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 20:36:18,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 20:36:18,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 20:36:18,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-23 20:36:18,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:18,878 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-11-23 20:36:18,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:36:19,704 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-11-23 20:36:19,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825220461] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:36:19,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [297196684] [2023-11-23 20:36:19,707 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-23 20:36:19,707 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:36:19,707 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:36:19,708 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:36:19,708 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:36:20,374 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:36:21,771 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2899#(and (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a6~0#1.base|) 0)) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_#t~mem16#1| |ULTIMATE.start_main_#t~mem15#1|)) (<= 2 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem15#1|))' at error location [2023-11-23 20:36:21,771 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 20:36:21,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:36:21,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2023-11-23 20:36:21,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262086902] [2023-11-23 20:36:21,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 20:36:21,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-23 20:36:21,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:21,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-23 20:36:21,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2023-11-23 20:36:21,776 INFO L87 Difference]: Start difference. First operand 85 states and 91 transitions. Second operand has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 50 states have internal predecessors, (65), 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) [2023-11-23 20:36:21,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:21,887 INFO L93 Difference]: Finished difference Result 170 states and 206 transitions. [2023-11-23 20:36:21,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-23 20:36:21,888 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 50 states have internal predecessors, (65), 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 83 [2023-11-23 20:36:21,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:21,889 INFO L225 Difference]: With dead ends: 170 [2023-11-23 20:36:21,890 INFO L226 Difference]: Without dead ends: 110 [2023-11-23 20:36:21,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 196 SyntacticMatches, 22 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2036 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2023-11-23 20:36:21,893 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:21,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:36:21,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-11-23 20:36:21,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2023-11-23 20:36:21,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.0642201834862386) internal successors, (116), 109 states have internal predecessors, (116), 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) [2023-11-23 20:36:21,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 116 transitions. [2023-11-23 20:36:21,905 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 116 transitions. Word has length 83 [2023-11-23 20:36:21,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:21,906 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 116 transitions. [2023-11-23 20:36:21,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 50 states have internal predecessors, (65), 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) [2023-11-23 20:36:21,906 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 116 transitions. [2023-11-23 20:36:21,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-23 20:36:21,908 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:21,909 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:21,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 20:36:22,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-23 20:36:22,125 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:22,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:22,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1297138325, now seen corresponding path program 7 times [2023-11-23 20:36:22,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:22,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867638117] [2023-11-23 20:36:22,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:22,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:22,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:25,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-11-23 20:36:25,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:25,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867638117] [2023-11-23 20:36:25,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867638117] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:36:25,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401810214] [2023-11-23 20:36:25,234 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-23 20:36:25,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:25,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:25,235 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:36:25,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 20:36:25,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:25,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 1133 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-23 20:36:25,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:25,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-11-23 20:36:25,828 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:36:29,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-11-23 20:36:29,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401810214] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:36:29,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [735191877] [2023-11-23 20:36:29,175 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-23 20:36:29,175 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:36:29,175 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:36:29,176 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:36:29,176 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:36:29,744 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:36:30,346 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4193#(and (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a6~0#1.base|) 0)) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#a5~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_#t~mem16#1| |ULTIMATE.start_main_#t~mem15#1|)) (<= 2 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem15#1|))' at error location [2023-11-23 20:36:30,346 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 20:36:30,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:36:30,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2023-11-23 20:36:30,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975816895] [2023-11-23 20:36:30,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 20:36:30,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-11-23 20:36:30,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:30,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-11-23 20:36:30,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2023-11-23 20:36:30,356 INFO L87 Difference]: Start difference. First operand 110 states and 116 transitions. Second operand has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 100 states have internal predecessors, (115), 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) [2023-11-23 20:36:30,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:30,567 INFO L93 Difference]: Finished difference Result 220 states and 281 transitions. [2023-11-23 20:36:30,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-11-23 20:36:30,568 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 100 states have internal predecessors, (115), 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 108 [2023-11-23 20:36:30,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:30,573 INFO L225 Difference]: With dead ends: 220 [2023-11-23 20:36:30,573 INFO L226 Difference]: Without dead ends: 160 [2023-11-23 20:36:30,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2023-11-23 20:36:30,584 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:30,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:36:30,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-11-23 20:36:30,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2023-11-23 20:36:30,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.0440251572327044) internal successors, (166), 159 states have internal predecessors, (166), 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) [2023-11-23 20:36:30,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 166 transitions. [2023-11-23 20:36:30,608 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 166 transitions. Word has length 108 [2023-11-23 20:36:30,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:30,609 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 166 transitions. [2023-11-23 20:36:30,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 100 states have internal predecessors, (115), 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) [2023-11-23 20:36:30,609 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 166 transitions. [2023-11-23 20:36:30,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-11-23 20:36:30,612 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:30,612 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:30,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 20:36:30,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-23 20:36:30,832 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:30,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:30,832 INFO L85 PathProgramCache]: Analyzing trace with hash 598230699, now seen corresponding path program 8 times [2023-11-23 20:36:30,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:30,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017761094] [2023-11-23 20:36:30,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:30,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:31,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:40,206 INFO L134 CoverageAnalysis]: Checked inductivity of 5126 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-11-23 20:36:40,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:40,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017761094] [2023-11-23 20:36:40,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017761094] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:36:40,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066682381] [2023-11-23 20:36:40,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 20:36:40,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:40,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:40,212 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:36:40,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5379eff7-3a9d-4411-9f21-c6079372215b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 20:36:48,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-23 20:36:48,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 20:36:48,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 20:36:48,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:48,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5126 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5071 trivial. 0 not checked. [2023-11-23 20:36:48,910 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:36:49,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5126 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5071 trivial. 0 not checked. [2023-11-23 20:36:49,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066682381] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:36:49,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1590528220] [2023-11-23 20:36:49,544 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-23 20:36:49,544 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:36:49,544 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:36:49,544 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:36:49,545 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:36:50,033 INFO L180 IcfgInterpreter]: Interpretation finished