./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/pr2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-tiling/pr2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje --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 5922a5be589e27d89439744489152c928c7510f0140c8b0fb4d1faadee969752 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 01:14:18,101 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 01:14:18,196 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 01:14:18,203 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 01:14:18,204 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 01:14:18,226 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 01:14:18,226 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 01:14:18,227 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 01:14:18,227 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 01:14:18,228 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 01:14:18,228 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 01:14:18,229 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 01:14:18,229 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 01:14:18,229 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 01:14:18,230 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 01:14:18,230 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 01:14:18,230 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 01:14:18,231 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 01:14:18,231 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 01:14:18,232 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 01:14:18,232 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 01:14:18,233 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 01:14:18,233 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 01:14:18,234 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 01:14:18,234 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 01:14:18,234 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 01:14:18,235 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 01:14:18,235 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 01:14:18,236 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 01:14:18,236 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 01:14:18,239 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 01:14:18,240 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 01:14:18,240 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 01:14:18,240 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 01:14:18,241 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 01:14:18,241 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 01:14:18,241 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 01:14:18,242 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 01:14:18,242 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 01:14:18,242 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 01:14:18,243 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 01:14:18,250 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 01:14:18,250 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 01:14:18,251 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 01:14:18,251 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 01:14:18,251 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 01:14:18,251 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 01:14:18,252 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_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5922a5be589e27d89439744489152c928c7510f0140c8b0fb4d1faadee969752 [2024-11-09 01:14:18,556 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 01:14:18,584 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 01:14:18,587 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 01:14:18,589 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 01:14:18,593 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 01:14:18,595 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/array-tiling/pr2.c Unable to find full path for "g++" [2024-11-09 01:14:20,602 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 01:14:20,886 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 01:14:20,886 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/sv-benchmarks/c/array-tiling/pr2.c [2024-11-09 01:14:20,898 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/data/84e9263ab/71b0bed6d62740db9a6af4f72d02a3ef/FLAGad950e3d0 [2024-11-09 01:14:21,192 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/data/84e9263ab/71b0bed6d62740db9a6af4f72d02a3ef [2024-11-09 01:14:21,195 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 01:14:21,197 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 01:14:21,198 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 01:14:21,198 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 01:14:21,205 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 01:14:21,206 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:14:21" (1/1) ... [2024-11-09 01:14:21,210 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4744fb2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:21, skipping insertion in model container [2024-11-09 01:14:21,210 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:14:21" (1/1) ... [2024-11-09 01:14:21,231 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 01:14:21,419 WARN L250 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_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/sv-benchmarks/c/array-tiling/pr2.c[394,407] [2024-11-09 01:14:21,440 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 01:14:21,448 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 01:14:21,461 WARN L250 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_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/sv-benchmarks/c/array-tiling/pr2.c[394,407] [2024-11-09 01:14:21,480 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 01:14:21,502 INFO L204 MainTranslator]: Completed translation [2024-11-09 01:14:21,502 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:21 WrapperNode [2024-11-09 01:14:21,502 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 01:14:21,504 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 01:14:21,504 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 01:14:21,505 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 01:14:21,513 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:21" (1/1) ... [2024-11-09 01:14:21,522 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:21" (1/1) ... [2024-11-09 01:14:21,543 INFO L138 Inliner]: procedures = 15, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2024-11-09 01:14:21,543 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 01:14:21,544 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 01:14:21,544 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 01:14:21,545 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 01:14:21,555 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:21" (1/1) ... [2024-11-09 01:14:21,555 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:21" (1/1) ... [2024-11-09 01:14:21,557 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:21" (1/1) ... [2024-11-09 01:14:21,558 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:21" (1/1) ... [2024-11-09 01:14:21,563 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:21" (1/1) ... [2024-11-09 01:14:21,567 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:21" (1/1) ... [2024-11-09 01:14:21,568 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:21" (1/1) ... [2024-11-09 01:14:21,569 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:21" (1/1) ... [2024-11-09 01:14:21,573 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 01:14:21,575 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 01:14:21,576 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 01:14:21,576 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 01:14:21,577 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:21" (1/1) ... [2024-11-09 01:14:21,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 01:14:21,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:14:21,611 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 01:14:21,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 01:14:21,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 01:14:21,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 01:14:21,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 01:14:21,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 01:14:21,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 01:14:21,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 01:14:21,640 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 01:14:21,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 01:14:21,713 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 01:14:21,715 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 01:14:21,914 INFO L? ?]: Removed 14 outVars from TransFormulas that were not future-live. [2024-11-09 01:14:21,914 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 01:14:22,013 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 01:14:22,013 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 01:14:22,014 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:14:22 BoogieIcfgContainer [2024-11-09 01:14:22,014 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 01:14:22,016 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 01:14:22,017 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 01:14:22,020 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 01:14:22,020 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 01:14:21" (1/3) ... [2024-11-09 01:14:22,021 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f70d6b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:14:22, skipping insertion in model container [2024-11-09 01:14:22,021 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:21" (2/3) ... [2024-11-09 01:14:22,022 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f70d6b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:14:22, skipping insertion in model container [2024-11-09 01:14:22,022 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:14:22" (3/3) ... [2024-11-09 01:14:22,023 INFO L112 eAbstractionObserver]: Analyzing ICFG pr2.c [2024-11-09 01:14:22,042 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 01:14:22,042 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 01:14:22,098 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 01:14:22,105 INFO L333 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, 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;@9f3516f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 01:14:22,106 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 01:14:22,110 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:14:22,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 01:14:22,117 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:14:22,118 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:14:22,119 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:14:22,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:14:22,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1103923057, now seen corresponding path program 1 times [2024-11-09 01:14:22,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:14:22,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499453175] [2024-11-09 01:14:22,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:22,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:14:22,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:22,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:14:22,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:14:22,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499453175] [2024-11-09 01:14:22,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499453175] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:14:22,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:14:22,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 01:14:22,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636875810] [2024-11-09 01:14:22,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:14:22,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 01:14:22,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:14:22,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 01:14:22,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 01:14:22,774 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:14:23,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:14:23,006 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2024-11-09 01:14:23,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 01:14:23,010 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-09 01:14:23,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:14:23,017 INFO L225 Difference]: With dead ends: 32 [2024-11-09 01:14:23,017 INFO L226 Difference]: Without dead ends: 14 [2024-11-09 01:14:23,021 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 01:14:23,026 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 19 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 01:14:23,028 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 16 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 01:14:23,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-11-09 01:14:23,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-11-09 01:14:23,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:14:23,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2024-11-09 01:14:23,063 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2024-11-09 01:14:23,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:14:23,063 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2024-11-09 01:14:23,064 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:14:23,065 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2024-11-09 01:14:23,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-09 01:14:23,066 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:14:23,066 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:14:23,066 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 01:14:23,067 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:14:23,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:14:23,068 INFO L85 PathProgramCache]: Analyzing trace with hash 700306807, now seen corresponding path program 1 times [2024-11-09 01:14:23,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:14:23,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790486253] [2024-11-09 01:14:23,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:23,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:14:23,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:24,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:14:24,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:14:24,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790486253] [2024-11-09 01:14:24,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790486253] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:14:24,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925660267] [2024-11-09 01:14:24,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:24,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:24,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:14:24,088 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:14:24,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 01:14:24,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:24,180 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 01:14:24,188 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:14:24,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 01:14:24,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 40 [2024-11-09 01:14:24,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 77 [2024-11-09 01:14:24,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 18 [2024-11-09 01:14:24,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-09 01:14:24,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 60 [2024-11-09 01:14:24,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2024-11-09 01:14:24,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-11-09 01:14:24,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-09 01:14:24,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 01:14:25,157 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:14:25,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 69 [2024-11-09 01:14:25,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:14:25,202 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:14:25,368 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:14:25,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 55 [2024-11-09 01:14:25,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 35 [2024-11-09 01:14:25,512 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 01:14:25,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 29 [2024-11-09 01:14:25,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2024-11-09 01:14:25,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:14:25,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925660267] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:14:25,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1004749497] [2024-11-09 01:14:25,576 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 01:14:25,577 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:14:25,580 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:14:25,586 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:14:25,586 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:14:26,284 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:14:26,940 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '153#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 2 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (<= (+ 1 (select (select |#memory_int| |ULTIMATE.start_main_~#volArray~0#1.base|) 0)) |ULTIMATE.start_main_~MINVAL~0#1|) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (not (= 0 (select (select |#memory_int| |ULTIMATE.start_main_~#volArray~0#1.base|) 0))) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= 2 |ULTIMATE.start_main_~#volArray~0#1.base|))' at error location [2024-11-09 01:14:26,940 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:14:26,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:14:26,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 15 [2024-11-09 01:14:26,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817706861] [2024-11-09 01:14:26,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:14:26,943 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 01:14:26,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:14:26,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 01:14:26,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2024-11-09 01:14:26,945 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 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) [2024-11-09 01:14:27,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:14:27,420 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2024-11-09 01:14:27,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 01:14:27,420 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 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 [2024-11-09 01:14:27,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:14:27,421 INFO L225 Difference]: With dead ends: 24 [2024-11-09 01:14:27,421 INFO L226 Difference]: Without dead ends: 22 [2024-11-09 01:14:27,422 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2024-11-09 01:14:27,423 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 60 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:14:27,423 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 24 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:14:27,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-09 01:14:27,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2024-11-09 01:14:27,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:14:27,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2024-11-09 01:14:27,430 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 11 [2024-11-09 01:14:27,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:14:27,430 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2024-11-09 01:14:27,430 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 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) [2024-11-09 01:14:27,431 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2024-11-09 01:14:27,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-09 01:14:27,431 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:14:27,431 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:14:27,452 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 01:14:27,632 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:27,632 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:14:27,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:14:27,633 INFO L85 PathProgramCache]: Analyzing trace with hash -986865839, now seen corresponding path program 1 times [2024-11-09 01:14:27,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:14:27,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4511910] [2024-11-09 01:14:27,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:27,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:14:27,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:27,954 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:14:27,954 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:14:27,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4511910] [2024-11-09 01:14:27,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4511910] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:14:27,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299078791] [2024-11-09 01:14:27,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:27,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:27,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:14:27,960 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:14:27,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 01:14:28,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:28,045 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 01:14:28,047 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:14:28,232 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:14:28,232 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:14:28,377 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:14:28,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299078791] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:14:28,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1953791514] [2024-11-09 01:14:28,380 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 01:14:28,381 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:14:28,381 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:14:28,381 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:14:28,382 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:14:29,206 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:14:29,661 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '352#(and (<= 1 |#StackHeapBarrier|) (<= 2 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= 2 |ULTIMATE.start_main_~#volArray~0#1.base|))' at error location [2024-11-09 01:14:29,661 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:14:29,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:14:29,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2024-11-09 01:14:29,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134880541] [2024-11-09 01:14:29,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:14:29,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 01:14:29,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:14:29,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 01:14:29,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2024-11-09 01:14:29,664 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 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) [2024-11-09 01:14:30,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:14:30,057 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2024-11-09 01:14:30,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 01:14:30,058 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 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 [2024-11-09 01:14:30,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:14:30,059 INFO L225 Difference]: With dead ends: 50 [2024-11-09 01:14:30,059 INFO L226 Difference]: Without dead ends: 24 [2024-11-09 01:14:30,060 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=260, Invalid=1072, Unknown=0, NotChecked=0, Total=1332 [2024-11-09 01:14:30,061 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 56 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:14:30,061 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 30 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:14:30,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-09 01:14:30,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2024-11-09 01:14:30,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:14:30,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2024-11-09 01:14:30,068 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2024-11-09 01:14:30,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:14:30,068 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2024-11-09 01:14:30,068 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 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) [2024-11-09 01:14:30,069 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2024-11-09 01:14:30,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-09 01:14:30,069 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:14:30,069 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:14:30,089 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 01:14:30,273 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:30,274 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:14:30,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:14:30,275 INFO L85 PathProgramCache]: Analyzing trace with hash -340329927, now seen corresponding path program 2 times [2024-11-09 01:14:30,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:14:30,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651200225] [2024-11-09 01:14:30,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:30,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:14:30,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:31,272 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:14:31,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:14:31,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651200225] [2024-11-09 01:14:31,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651200225] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:14:31,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309195452] [2024-11-09 01:14:31,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:14:31,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:31,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:14:31,276 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:14:31,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 01:14:31,369 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 01:14:31,369 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:14:31,371 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-09 01:14:31,377 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:14:31,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 42 [2024-11-09 01:14:31,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 70 [2024-11-09 01:14:31,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 01:14:31,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 106 [2024-11-09 01:14:31,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 58 [2024-11-09 01:14:31,674 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 01:14:31,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 37 [2024-11-09 01:14:31,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 01:14:31,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 37 [2024-11-09 01:14:31,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2024-11-09 01:14:31,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 01:14:31,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2024-11-09 01:14:32,521 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:14:32,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 71 [2024-11-09 01:14:32,567 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:14:32,567 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:14:32,792 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:14:32,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 55 [2024-11-09 01:14:32,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 41 [2024-11-09 01:14:32,882 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 01:14:32,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 33 [2024-11-09 01:14:32,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2024-11-09 01:14:32,943 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:14:32,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309195452] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:14:32,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1019979030] [2024-11-09 01:14:32,945 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 01:14:32,945 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:14:32,946 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:14:32,946 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:14:32,946 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:14:33,672 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:14:34,159 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '617#(and (<= 1 |#StackHeapBarrier|) (<= 2 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= 2 |ULTIMATE.start_main_~#volArray~0#1.base|))' at error location [2024-11-09 01:14:34,160 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:14:34,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:14:34,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2024-11-09 01:14:34,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990525818] [2024-11-09 01:14:34,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:14:34,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-09 01:14:34,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:14:34,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-09 01:14:34,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2024-11-09 01:14:34,162 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 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) [2024-11-09 01:14:34,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:14:34,754 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2024-11-09 01:14:34,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 01:14:34,755 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-09 01:14:34,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:14:34,755 INFO L225 Difference]: With dead ends: 36 [2024-11-09 01:14:34,756 INFO L226 Difference]: Without dead ends: 34 [2024-11-09 01:14:34,756 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=205, Invalid=1127, Unknown=0, NotChecked=0, Total=1332 [2024-11-09 01:14:34,757 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 90 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 01:14:34,757 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 35 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 01:14:34,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-09 01:14:34,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2024-11-09 01:14:34,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 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) [2024-11-09 01:14:34,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2024-11-09 01:14:34,765 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 21 [2024-11-09 01:14:34,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:14:34,765 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2024-11-09 01:14:34,766 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 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) [2024-11-09 01:14:34,766 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2024-11-09 01:14:34,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-09 01:14:34,767 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:14:34,767 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:14:34,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 01:14:34,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:34,968 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:14:34,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:14:34,968 INFO L85 PathProgramCache]: Analyzing trace with hash 2040455699, now seen corresponding path program 3 times [2024-11-09 01:14:34,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:14:34,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441701544] [2024-11-09 01:14:34,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:34,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:14:34,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:35,338 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 23 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:14:35,338 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:14:35,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441701544] [2024-11-09 01:14:35,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441701544] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:14:35,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629012167] [2024-11-09 01:14:35,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 01:14:35,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:35,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:14:35,341 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:14:35,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 01:14:35,421 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 01:14:35,422 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:14:35,423 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 01:14:35,425 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:14:35,693 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 36 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:14:35,694 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:14:35,879 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 36 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:14:35,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629012167] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:14:35,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [65454979] [2024-11-09 01:14:35,881 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 01:14:35,881 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:14:35,881 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:14:35,881 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:14:35,881 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:14:36,525 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:14:36,980 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '915#(and (<= 1 |#StackHeapBarrier|) (<= 2 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= 2 |ULTIMATE.start_main_~#volArray~0#1.base|))' at error location [2024-11-09 01:14:36,980 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:14:36,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:14:36,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 27 [2024-11-09 01:14:36,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610241394] [2024-11-09 01:14:36,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:14:36,982 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-09 01:14:36,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:14:36,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-09 01:14:36,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=856, Unknown=0, NotChecked=0, Total=1056 [2024-11-09 01:14:36,984 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 27 states have internal predecessors, (75), 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) [2024-11-09 01:14:37,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:14:37,357 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2024-11-09 01:14:37,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 01:14:37,358 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 27 states have internal predecessors, (75), 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 29 [2024-11-09 01:14:37,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:14:37,358 INFO L225 Difference]: With dead ends: 57 [2024-11-09 01:14:37,359 INFO L226 Difference]: Without dead ends: 33 [2024-11-09 01:14:37,360 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=379, Invalid=1601, Unknown=0, NotChecked=0, Total=1980 [2024-11-09 01:14:37,361 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 58 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:14:37,361 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 44 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:14:37,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-09 01:14:37,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2024-11-09 01:14:37,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 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) [2024-11-09 01:14:37,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2024-11-09 01:14:37,369 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2024-11-09 01:14:37,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:14:37,369 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2024-11-09 01:14:37,369 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 27 states have internal predecessors, (75), 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) [2024-11-09 01:14:37,369 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2024-11-09 01:14:37,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-09 01:14:37,370 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:14:37,370 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:14:37,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 01:14:37,571 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:37,571 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:14:37,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:14:37,572 INFO L85 PathProgramCache]: Analyzing trace with hash 520207099, now seen corresponding path program 4 times [2024-11-09 01:14:37,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:14:37,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599870839] [2024-11-09 01:14:37,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:37,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:14:37,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:38,379 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:14:38,380 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:14:38,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599870839] [2024-11-09 01:14:38,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599870839] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:14:38,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785304910] [2024-11-09 01:14:38,380 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 01:14:38,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:38,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:14:38,382 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:14:38,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 01:14:38,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:38,479 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-09 01:14:38,482 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:14:38,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 38 [2024-11-09 01:14:38,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 65 [2024-11-09 01:14:38,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 18 [2024-11-09 01:14:38,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 94 [2024-11-09 01:14:38,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 50 [2024-11-09 01:14:38,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2024-11-09 01:14:38,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 25 [2024-11-09 01:14:39,747 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:14:39,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 68 [2024-11-09 01:14:39,802 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:14:39,802 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:14:40,113 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:14:40,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 55 [2024-11-09 01:14:40,211 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 01:14:40,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2024-11-09 01:14:40,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2024-11-09 01:14:40,306 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:14:40,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785304910] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:14:40,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [682527125] [2024-11-09 01:14:40,308 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 01:14:40,308 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:14:40,308 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:14:40,309 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:14:40,309 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:14:40,907 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:14:41,578 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1271#(and (<= 1 |#StackHeapBarrier|) (<= 2 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= 2 |ULTIMATE.start_main_~#volArray~0#1.base|))' at error location [2024-11-09 01:14:41,578 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:14:41,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:14:41,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 33 [2024-11-09 01:14:41,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476893920] [2024-11-09 01:14:41,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:14:41,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-09 01:14:41,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:14:41,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-09 01:14:41,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1339, Unknown=0, NotChecked=0, Total=1482 [2024-11-09 01:14:41,581 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 33 states, 33 states have (on average 2.6666666666666665) internal successors, (88), 33 states have internal predecessors, (88), 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) [2024-11-09 01:14:42,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:14:42,918 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2024-11-09 01:14:42,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-09 01:14:42,919 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.6666666666666665) internal successors, (88), 33 states have internal predecessors, (88), 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 31 [2024-11-09 01:14:42,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:14:42,921 INFO L225 Difference]: With dead ends: 48 [2024-11-09 01:14:42,921 INFO L226 Difference]: Without dead ends: 46 [2024-11-09 01:14:42,922 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 63 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=326, Invalid=2536, Unknown=0, NotChecked=0, Total=2862 [2024-11-09 01:14:42,923 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 138 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 01:14:42,924 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 87 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 01:14:42,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-09 01:14:42,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 36. [2024-11-09 01:14:42,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 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) [2024-11-09 01:14:42,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2024-11-09 01:14:42,939 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 31 [2024-11-09 01:14:42,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:14:42,940 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2024-11-09 01:14:42,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.6666666666666665) internal successors, (88), 33 states have internal predecessors, (88), 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) [2024-11-09 01:14:42,940 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2024-11-09 01:14:42,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-09 01:14:42,941 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:14:42,941 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:14:42,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 01:14:43,143 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:43,144 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:14:43,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:14:43,144 INFO L85 PathProgramCache]: Analyzing trace with hash 172698920, now seen corresponding path program 5 times [2024-11-09 01:14:43,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:14:43,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375857958] [2024-11-09 01:14:43,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:43,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:14:43,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:43,901 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:14:43,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:14:43,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375857958] [2024-11-09 01:14:43,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375857958] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:14:43,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341613989] [2024-11-09 01:14:43,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:14:43,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:43,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:14:43,905 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:14:43,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 01:14:44,057 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-09 01:14:44,057 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:14:44,059 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-09 01:14:44,061 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:14:44,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 01:14:44,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 01:14:44,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 53 [2024-11-09 01:14:44,649 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:14:44,649 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:14:44,981 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:14:44,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 55 [2024-11-09 01:14:45,022 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 01:14:45,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2024-11-09 01:14:45,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2024-11-09 01:14:45,119 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:14:45,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341613989] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:14:45,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1796095012] [2024-11-09 01:14:45,121 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 01:14:45,121 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:14:45,122 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:14:45,122 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:14:45,122 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:14:45,751 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:14:46,364 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1651#(and (<= 1 |#StackHeapBarrier|) (<= 2 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= 2 |ULTIMATE.start_main_~#volArray~0#1.base|))' at error location [2024-11-09 01:14:46,364 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:14:46,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:14:46,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2024-11-09 01:14:46,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630550910] [2024-11-09 01:14:46,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:14:46,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-09 01:14:46,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:14:46,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-09 01:14:46,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1270, Unknown=0, NotChecked=0, Total=1406 [2024-11-09 01:14:46,366 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 32 states, 32 states have (on average 2.90625) internal successors, (93), 32 states have internal predecessors, (93), 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) [2024-11-09 01:14:47,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:14:47,558 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2024-11-09 01:14:47,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 01:14:47,559 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.90625) internal successors, (93), 32 states have internal predecessors, (93), 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 35 [2024-11-09 01:14:47,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:14:47,560 INFO L225 Difference]: With dead ends: 56 [2024-11-09 01:14:47,560 INFO L226 Difference]: Without dead ends: 54 [2024-11-09 01:14:47,560 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 77 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=307, Invalid=2449, Unknown=0, NotChecked=0, Total=2756 [2024-11-09 01:14:47,561 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 116 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 01:14:47,561 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 97 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 01:14:47,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-09 01:14:47,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 40. [2024-11-09 01:14:47,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:14:47,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2024-11-09 01:14:47,583 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 35 [2024-11-09 01:14:47,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:14:47,583 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2024-11-09 01:14:47,584 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.90625) internal successors, (93), 32 states have internal predecessors, (93), 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) [2024-11-09 01:14:47,584 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2024-11-09 01:14:47,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-09 01:14:47,584 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:14:47,585 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:14:47,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 01:14:47,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:47,785 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:14:47,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:14:47,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1912979669, now seen corresponding path program 6 times [2024-11-09 01:14:47,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:14:47,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440903954] [2024-11-09 01:14:47,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:47,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:14:47,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:48,244 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 57 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:14:48,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:14:48,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440903954] [2024-11-09 01:14:48,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440903954] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:14:48,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686350025] [2024-11-09 01:14:48,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 01:14:48,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:48,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:14:48,247 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:14:48,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 01:14:48,342 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 01:14:48,342 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:14:48,344 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 01:14:48,346 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:14:48,724 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 78 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:14:48,724 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:14:49,000 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 78 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:14:49,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686350025] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:14:49,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1142737841] [2024-11-09 01:14:49,002 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 01:14:49,002 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:14:49,003 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:14:49,003 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:14:49,003 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:14:49,524 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:14:50,092 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2074#(and (<= 1 |#StackHeapBarrier|) (<= 2 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= 2 |ULTIMATE.start_main_~#volArray~0#1.base|))' at error location [2024-11-09 01:14:50,093 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:14:50,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:14:50,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 35 [2024-11-09 01:14:50,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019737352] [2024-11-09 01:14:50,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:14:50,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-09 01:14:50,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:14:50,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-09 01:14:50,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1323, Unknown=0, NotChecked=0, Total=1640 [2024-11-09 01:14:50,096 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 35 states have internal predecessors, (103), 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) [2024-11-09 01:14:50,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:14:50,623 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2024-11-09 01:14:50,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 01:14:50,623 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 35 states have internal predecessors, (103), 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 39 [2024-11-09 01:14:50,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:14:50,624 INFO L225 Difference]: With dead ends: 75 [2024-11-09 01:14:50,624 INFO L226 Difference]: Without dead ends: 43 [2024-11-09 01:14:50,625 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1094 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=612, Invalid=2580, Unknown=0, NotChecked=0, Total=3192 [2024-11-09 01:14:50,628 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 88 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 01:14:50,628 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 63 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 01:14:50,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-09 01:14:50,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2024-11-09 01:14:50,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:14:50,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2024-11-09 01:14:50,646 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39 [2024-11-09 01:14:50,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:14:50,646 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2024-11-09 01:14:50,646 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 35 states have internal predecessors, (103), 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) [2024-11-09 01:14:50,646 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2024-11-09 01:14:50,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-09 01:14:50,649 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:14:50,649 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:14:50,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 01:14:50,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:50,850 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:14:50,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:14:50,850 INFO L85 PathProgramCache]: Analyzing trace with hash 721196989, now seen corresponding path program 7 times [2024-11-09 01:14:50,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:14:50,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994493834] [2024-11-09 01:14:50,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:50,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:14:50,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:51,982 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:14:51,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:14:51,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994493834] [2024-11-09 01:14:51,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994493834] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:14:51,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186425725] [2024-11-09 01:14:51,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 01:14:51,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:51,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:14:51,986 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:14:51,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 01:14:52,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:52,102 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-09 01:14:52,107 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:14:52,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 01:14:52,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 40 [2024-11-09 01:14:52,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 77 [2024-11-09 01:14:52,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 18 [2024-11-09 01:14:52,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-09 01:14:52,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 60 [2024-11-09 01:14:52,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-09 01:14:52,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2024-11-09 01:14:52,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-11-09 01:14:52,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 01:14:53,987 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:14:53,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 69 [2024-11-09 01:14:54,026 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:14:54,026 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:14:54,555 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:14:54,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 55 [2024-11-09 01:14:54,637 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 01:14:54,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2024-11-09 01:14:54,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2024-11-09 01:14:54,816 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:14:54,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186425725] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:14:54,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1729496121] [2024-11-09 01:14:54,818 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 01:14:54,818 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:14:54,819 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:14:54,819 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:14:54,819 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:14:55,301 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:14:56,111 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2543#(and (<= 1 |#StackHeapBarrier|) (<= 2 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= 2 |ULTIMATE.start_main_~#volArray~0#1.base|))' at error location [2024-11-09 01:14:56,111 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:14:56,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:14:56,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 42 [2024-11-09 01:14:56,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947330848] [2024-11-09 01:14:56,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:14:56,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-09 01:14:56,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:14:56,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-09 01:14:56,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=2087, Unknown=0, NotChecked=0, Total=2256 [2024-11-09 01:14:56,114 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 42 states, 42 states have (on average 2.8095238095238093) internal successors, (118), 42 states have internal predecessors, (118), 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) [2024-11-09 01:14:58,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:14:58,726 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2024-11-09 01:14:58,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-09 01:14:58,727 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.8095238095238093) internal successors, (118), 42 states have internal predecessors, (118), 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 41 [2024-11-09 01:14:58,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:14:58,727 INFO L225 Difference]: With dead ends: 68 [2024-11-09 01:14:58,727 INFO L226 Difference]: Without dead ends: 66 [2024-11-09 01:14:58,729 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 86 SyntacticMatches, 5 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=471, Invalid=4359, Unknown=0, NotChecked=0, Total=4830 [2024-11-09 01:14:58,729 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 265 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 01:14:58,729 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 141 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 01:14:58,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-09 01:14:58,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 50. [2024-11-09 01:14:58,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:14:58,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2024-11-09 01:14:58,746 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 41 [2024-11-09 01:14:58,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:14:58,746 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2024-11-09 01:14:58,746 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.8095238095238093) internal successors, (118), 42 states have internal predecessors, (118), 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) [2024-11-09 01:14:58,746 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2024-11-09 01:14:58,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-09 01:14:58,747 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:14:58,747 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:14:58,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-09 01:14:58,947 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:58,948 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:14:58,948 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:14:58,948 INFO L85 PathProgramCache]: Analyzing trace with hash 255900567, now seen corresponding path program 8 times [2024-11-09 01:14:58,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:14:58,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526925835] [2024-11-09 01:14:58,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:58,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:14:58,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:59,544 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 107 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:14:59,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:14:59,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526925835] [2024-11-09 01:14:59,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526925835] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:14:59,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254578998] [2024-11-09 01:14:59,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:14:59,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:59,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:14:59,547 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:14:59,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 01:15:00,087 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-09 01:15:00,088 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:15:00,090 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-09 01:15:00,092 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:15:00,547 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 136 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:15:00,548 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:15:00,922 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 136 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:15:00,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254578998] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:15:00,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [494532529] [2024-11-09 01:15:00,926 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 01:15:00,926 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:15:00,926 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:15:00,927 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:15:00,927 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:15:01,401 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:15:02,008 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3077#(and (<= 1 |#StackHeapBarrier|) (<= 2 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= 2 |ULTIMATE.start_main_~#volArray~0#1.base|))' at error location [2024-11-09 01:15:02,008 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:15:02,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:15:02,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 43 [2024-11-09 01:15:02,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971245247] [2024-11-09 01:15:02,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:15:02,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-09 01:15:02,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:15:02,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-09 01:15:02,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=1887, Unknown=0, NotChecked=0, Total=2352 [2024-11-09 01:15:02,011 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 43 states, 43 states have (on average 3.046511627906977) internal successors, (131), 43 states have internal predecessors, (131), 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) [2024-11-09 01:15:02,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:15:02,728 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2024-11-09 01:15:02,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-09 01:15:02,728 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.046511627906977) internal successors, (131), 43 states have internal predecessors, (131), 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 49 [2024-11-09 01:15:02,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:15:02,730 INFO L225 Difference]: With dead ends: 93 [2024-11-09 01:15:02,730 INFO L226 Difference]: Without dead ends: 53 [2024-11-09 01:15:02,732 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 114 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1669 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=905, Invalid=3787, Unknown=0, NotChecked=0, Total=4692 [2024-11-09 01:15:02,732 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 108 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 01:15:02,733 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 87 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 01:15:02,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-09 01:15:02,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2024-11-09 01:15:02,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 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) [2024-11-09 01:15:02,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2024-11-09 01:15:02,761 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 49 [2024-11-09 01:15:02,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:15:02,762 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2024-11-09 01:15:02,762 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.046511627906977) internal successors, (131), 43 states have internal predecessors, (131), 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) [2024-11-09 01:15:02,762 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2024-11-09 01:15:02,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-09 01:15:02,763 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:15:02,763 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:15:02,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 01:15:02,963 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 01:15:02,963 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:15:02,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:15:02,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1452928897, now seen corresponding path program 9 times [2024-11-09 01:15:02,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:15:02,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730864858] [2024-11-09 01:15:02,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:15:02,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:15:03,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:15:04,233 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:15:04,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:15:04,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730864858] [2024-11-09 01:15:04,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730864858] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:15:04,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404943539] [2024-11-09 01:15:04,233 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 01:15:04,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:15:04,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:15:04,234 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:15:04,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 01:15:04,355 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 01:15:04,355 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:15:04,357 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-09 01:15:04,360 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:15:04,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 44 [2024-11-09 01:15:04,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 66 [2024-11-09 01:15:04,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 58 [2024-11-09 01:15:04,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2024-11-09 01:15:04,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-11-09 01:15:04,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-11-09 01:15:04,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-09 01:15:05,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 47 [2024-11-09 01:15:05,110 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:15:05,110 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:15:05,661 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:15:05,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 55 [2024-11-09 01:15:05,726 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 01:15:05,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2024-11-09 01:15:05,739 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 01:15:05,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2024-11-09 01:15:05,758 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:15:05,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404943539] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:15:05,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1777140224] [2024-11-09 01:15:05,760 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 01:15:05,761 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:15:05,761 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:15:05,761 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:15:05,761 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:15:06,281 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:15:07,138 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3652#(and (<= 1 |#StackHeapBarrier|) (<= 2 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= 2 |ULTIMATE.start_main_~#volArray~0#1.base|))' at error location [2024-11-09 01:15:07,138 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:15:07,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:15:07,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 44 [2024-11-09 01:15:07,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446103297] [2024-11-09 01:15:07,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:15:07,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-09 01:15:07,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:15:07,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-09 01:15:07,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2294, Unknown=0, NotChecked=0, Total=2450 [2024-11-09 01:15:07,140 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 44 states, 44 states have (on average 3.0681818181818183) internal successors, (135), 44 states have internal predecessors, (135), 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) [2024-11-09 01:15:09,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:15:09,884 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2024-11-09 01:15:09,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-09 01:15:09,885 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.0681818181818183) internal successors, (135), 44 states have internal predecessors, (135), 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 51 [2024-11-09 01:15:09,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:15:09,886 INFO L225 Difference]: With dead ends: 80 [2024-11-09 01:15:09,886 INFO L226 Difference]: Without dead ends: 78 [2024-11-09 01:15:09,887 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 116 SyntacticMatches, 6 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1337 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=444, Invalid=4958, Unknown=0, NotChecked=0, Total=5402 [2024-11-09 01:15:09,888 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 213 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 1181 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 1262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-09 01:15:09,888 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 216 Invalid, 1262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1181 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-09 01:15:09,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-09 01:15:09,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 56. [2024-11-09 01:15:09,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 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) [2024-11-09 01:15:09,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2024-11-09 01:15:09,911 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 51 [2024-11-09 01:15:09,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:15:09,911 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2024-11-09 01:15:09,912 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.0681818181818183) internal successors, (135), 44 states have internal predecessors, (135), 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) [2024-11-09 01:15:09,912 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2024-11-09 01:15:09,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-09 01:15:09,912 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:15:09,913 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:15:09,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 01:15:10,113 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-09 01:15:10,113 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:15:10,113 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:15:10,114 INFO L85 PathProgramCache]: Analyzing trace with hash 2009145516, now seen corresponding path program 10 times [2024-11-09 01:15:10,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:15:10,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332824972] [2024-11-09 01:15:10,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:15:10,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:15:10,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:15:11,119 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:15:11,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:15:11,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332824972] [2024-11-09 01:15:11,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332824972] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:15:11,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626679953] [2024-11-09 01:15:11,119 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 01:15:11,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:15:11,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:15:11,121 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:15:11,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 01:15:11,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:15:11,261 INFO L255 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-09 01:15:11,264 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:15:11,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 40 [2024-11-09 01:15:11,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2024-11-09 01:15:12,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 47 [2024-11-09 01:15:12,288 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:15:12,288 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:15:13,026 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:15:13,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 55 [2024-11-09 01:15:13,068 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 01:15:13,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 33 [2024-11-09 01:15:13,279 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:15:13,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626679953] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:15:13,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1929746956] [2024-11-09 01:15:13,281 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 01:15:13,282 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:15:13,282 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:15:13,282 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:15:13,282 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:15:13,876 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:15:15,038 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4262#(and (<= 1 |#StackHeapBarrier|) (<= 2 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= 2 |ULTIMATE.start_main_~#volArray~0#1.base|))' at error location [2024-11-09 01:15:15,038 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:15:15,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:15:15,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 19] total 54 [2024-11-09 01:15:15,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459681553] [2024-11-09 01:15:15,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:15:15,039 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-11-09 01:15:15,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:15:15,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-11-09 01:15:15,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=3320, Unknown=0, NotChecked=0, Total=3540 [2024-11-09 01:15:15,041 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 54 states, 54 states have (on average 2.962962962962963) internal successors, (160), 54 states have internal predecessors, (160), 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) [2024-11-09 01:15:19,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:15:19,407 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2024-11-09 01:15:19,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-09 01:15:19,408 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.962962962962963) internal successors, (160), 54 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2024-11-09 01:15:19,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:15:19,409 INFO L225 Difference]: With dead ends: 88 [2024-11-09 01:15:19,409 INFO L226 Difference]: Without dead ends: 86 [2024-11-09 01:15:19,411 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 119 SyntacticMatches, 6 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1762 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=681, Invalid=7329, Unknown=0, NotChecked=0, Total=8010 [2024-11-09 01:15:19,411 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 276 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 1668 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 1776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-09 01:15:19,411 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 291 Invalid, 1776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1668 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-09 01:15:19,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-09 01:15:19,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 60. [2024-11-09 01:15:19,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 states have internal predecessors, (61), 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) [2024-11-09 01:15:19,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2024-11-09 01:15:19,431 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 55 [2024-11-09 01:15:19,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:15:19,431 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2024-11-09 01:15:19,431 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.962962962962963) internal successors, (160), 54 states have internal predecessors, (160), 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) [2024-11-09 01:15:19,431 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2024-11-09 01:15:19,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-09 01:15:19,432 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:15:19,432 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:15:19,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-09 01:15:19,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-09 01:15:19,633 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:15:19,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:15:19,633 INFO L85 PathProgramCache]: Analyzing trace with hash -2071047591, now seen corresponding path program 11 times [2024-11-09 01:15:19,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:15:19,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63749185] [2024-11-09 01:15:19,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:15:19,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:15:19,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:15:20,356 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 173 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:15:20,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:15:20,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63749185] [2024-11-09 01:15:20,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63749185] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:15:20,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204479228] [2024-11-09 01:15:20,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:15:20,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:15:20,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:15:20,358 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:15:20,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 01:15:20,853 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-09 01:15:20,853 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:15:20,855 INFO L255 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-09 01:15:20,857 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:15:21,433 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 210 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:15:21,434 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:15:21,924 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 210 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:15:21,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204479228] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:15:21,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [891899254] [2024-11-09 01:15:21,926 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 01:15:21,926 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:15:21,926 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:15:21,926 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:15:21,926 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:15:22,422 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:15:23,262 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4921#(and (<= 1 |#StackHeapBarrier|) (<= 2 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= 2 |ULTIMATE.start_main_~#volArray~0#1.base|))' at error location [2024-11-09 01:15:23,262 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:15:23,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:15:23,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 51 [2024-11-09 01:15:23,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059388113] [2024-11-09 01:15:23,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:15:23,263 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-09 01:15:23,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:15:23,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-09 01:15:23,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=644, Invalid=2548, Unknown=0, NotChecked=0, Total=3192 [2024-11-09 01:15:23,265 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 51 states, 51 states have (on average 3.1176470588235294) internal successors, (159), 51 states have internal predecessors, (159), 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) [2024-11-09 01:15:24,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:15:24,023 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2024-11-09 01:15:24,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-09 01:15:24,023 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.1176470588235294) internal successors, (159), 51 states have internal predecessors, (159), 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 59 [2024-11-09 01:15:24,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:15:24,024 INFO L225 Difference]: With dead ends: 111 [2024-11-09 01:15:24,024 INFO L226 Difference]: Without dead ends: 63 [2024-11-09 01:15:24,025 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 138 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2362 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1258, Invalid=5222, Unknown=0, NotChecked=0, Total=6480 [2024-11-09 01:15:24,026 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 126 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 01:15:24,027 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 101 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 01:15:24,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-09 01:15:24,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2024-11-09 01:15:24,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 states have internal predecessors, (63), 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) [2024-11-09 01:15:24,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2024-11-09 01:15:24,056 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 59 [2024-11-09 01:15:24,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:15:24,056 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2024-11-09 01:15:24,057 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.1176470588235294) internal successors, (159), 51 states have internal predecessors, (159), 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) [2024-11-09 01:15:24,057 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2024-11-09 01:15:24,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-09 01:15:24,058 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:15:24,058 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:15:24,080 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 01:15:24,258 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-09 01:15:24,258 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:15:24,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:15:24,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1851565377, now seen corresponding path program 12 times [2024-11-09 01:15:24,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:15:24,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263015756] [2024-11-09 01:15:24,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:15:24,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:15:24,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:15:25,713 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:15:25,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:15:25,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263015756] [2024-11-09 01:15:25,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263015756] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:15:25,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802096324] [2024-11-09 01:15:25,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 01:15:25,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:15:25,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:15:25,714 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:15:25,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 01:15:25,869 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 01:15:25,869 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:15:25,871 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-09 01:15:25,874 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:15:26,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 44 [2024-11-09 01:15:26,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 130 [2024-11-09 01:15:26,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 132 [2024-11-09 01:15:26,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 45 [2024-11-09 01:15:26,111 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 01:15:26,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2024-11-09 01:15:26,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 45 [2024-11-09 01:15:26,154 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 01:15:26,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2024-11-09 01:15:26,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-09 01:15:26,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-09 01:15:26,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 01:15:26,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-11-09 01:15:26,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2024-11-09 01:15:26,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2024-11-09 01:15:26,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-09 01:15:28,098 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:15:28,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 67 [2024-11-09 01:15:28,155 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:15:28,155 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:15:28,982 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:15:28,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 55 [2024-11-09 01:15:29,081 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 01:15:29,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2024-11-09 01:15:29,092 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 01:15:29,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2024-11-09 01:15:29,112 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:15:29,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802096324] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:15:29,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [651056344] [2024-11-09 01:15:29,114 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 01:15:29,114 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:15:29,115 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:15:29,115 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:15:29,115 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:15:32,223 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:15:33,673 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5609#(and (<= 1 |#StackHeapBarrier|) (<= 2 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= 2 |ULTIMATE.start_main_~#volArray~0#1.base|))' at error location [2024-11-09 01:15:33,673 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:15:33,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:15:33,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 53 [2024-11-09 01:15:33,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773770214] [2024-11-09 01:15:33,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:15:33,674 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-09 01:15:33,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:15:33,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-09 01:15:33,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=3218, Unknown=0, NotChecked=0, Total=3422 [2024-11-09 01:15:33,676 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 53 states, 53 states have (on average 3.1132075471698113) internal successors, (165), 53 states have internal predecessors, (165), 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) [2024-11-09 01:15:39,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:15:39,913 INFO L93 Difference]: Finished difference Result 100 states and 115 transitions. [2024-11-09 01:15:39,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-09 01:15:39,913 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.1132075471698113) internal successors, (165), 53 states have internal predecessors, (165), 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 61 [2024-11-09 01:15:39,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:15:39,914 INFO L225 Difference]: With dead ends: 100 [2024-11-09 01:15:39,914 INFO L226 Difference]: Without dead ends: 98 [2024-11-09 01:15:39,915 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 139 SyntacticMatches, 7 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1920 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=654, Invalid=7356, Unknown=0, NotChecked=0, Total=8010 [2024-11-09 01:15:39,916 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 317 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 1635 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 1769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-09 01:15:39,916 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 295 Invalid, 1769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1635 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-11-09 01:15:39,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-09 01:15:39,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 70. [2024-11-09 01:15:39,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 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) [2024-11-09 01:15:39,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2024-11-09 01:15:39,943 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 61 [2024-11-09 01:15:39,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:15:39,943 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2024-11-09 01:15:39,943 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.1132075471698113) internal successors, (165), 53 states have internal predecessors, (165), 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) [2024-11-09 01:15:39,943 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2024-11-09 01:15:39,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-09 01:15:39,944 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:15:39,944 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:15:39,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-09 01:15:40,145 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 01:15:40,145 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:15:40,145 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:15:40,145 INFO L85 PathProgramCache]: Analyzing trace with hash -544406245, now seen corresponding path program 13 times [2024-11-09 01:15:40,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:15:40,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679568096] [2024-11-09 01:15:40,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:15:40,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:15:40,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:15:41,139 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 255 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:15:41,139 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:15:41,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679568096] [2024-11-09 01:15:41,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679568096] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:15:41,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685415967] [2024-11-09 01:15:41,139 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 01:15:41,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:15:41,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:15:41,141 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:15:41,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 01:15:41,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:15:41,315 INFO L255 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-09 01:15:41,317 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:15:42,321 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 300 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:15:42,321 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:15:43,409 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 300 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:15:43,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685415967] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:15:43,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [903817382] [2024-11-09 01:15:43,411 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 01:15:43,411 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:15:43,411 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:15:43,411 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:15:43,411 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:15:43,871 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:15:45,033 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6367#(and (<= 1 |#StackHeapBarrier|) (<= 2 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= 2 |ULTIMATE.start_main_~#volArray~0#1.base|))' at error location [2024-11-09 01:15:45,033 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:15:45,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:15:45,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 59 [2024-11-09 01:15:45,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489974399] [2024-11-09 01:15:45,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:15:45,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-11-09 01:15:45,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:15:45,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-11-09 01:15:45,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=854, Invalid=3306, Unknown=0, NotChecked=0, Total=4160 [2024-11-09 01:15:45,036 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 59 states, 59 states have (on average 3.169491525423729) internal successors, (187), 59 states have internal predecessors, (187), 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) [2024-11-09 01:15:46,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:15:46,442 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2024-11-09 01:15:46,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-09 01:15:46,442 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.169491525423729) internal successors, (187), 59 states have internal predecessors, (187), 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 69 [2024-11-09 01:15:46,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:15:46,443 INFO L225 Difference]: With dead ends: 129 [2024-11-09 01:15:46,443 INFO L226 Difference]: Without dead ends: 73 [2024-11-09 01:15:46,444 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 162 SyntacticMatches, 6 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3173 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1671, Invalid=6885, Unknown=0, NotChecked=0, Total=8556 [2024-11-09 01:15:46,444 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 141 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 01:15:46,445 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 118 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 01:15:46,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-09 01:15:46,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2024-11-09 01:15:46,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 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) [2024-11-09 01:15:46,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2024-11-09 01:15:46,473 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 69 [2024-11-09 01:15:46,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:15:46,473 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2024-11-09 01:15:46,473 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.169491525423729) internal successors, (187), 59 states have internal predecessors, (187), 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) [2024-11-09 01:15:46,473 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2024-11-09 01:15:46,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-09 01:15:46,474 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:15:46,474 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:15:46,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-09 01:15:46,675 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:15:46,675 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:15:46,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:15:46,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1872833021, now seen corresponding path program 14 times [2024-11-09 01:15:46,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:15:46,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332762486] [2024-11-09 01:15:46,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:15:46,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:15:46,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:15:48,927 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:15:48,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:15:48,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332762486] [2024-11-09 01:15:48,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332762486] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:15:48,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510022782] [2024-11-09 01:15:48,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:15:48,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:15:48,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:15:48,931 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:15:48,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 01:15:51,069 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-11-09 01:15:51,070 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:15:51,074 INFO L255 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-09 01:15:51,077 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:15:51,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 42 [2024-11-09 01:15:51,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 58 [2024-11-09 01:15:51,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 52 [2024-11-09 01:15:51,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 28 [2024-11-09 01:15:51,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-11-09 01:15:51,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2024-11-09 01:15:51,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-11-09 01:15:53,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 53 [2024-11-09 01:15:53,203 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:15:53,203 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:15:54,320 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:15:54,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 55 [2024-11-09 01:15:54,414 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 01:15:54,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2024-11-09 01:15:54,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2024-11-09 01:15:54,857 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:15:54,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510022782] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:15:54,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1173315218] [2024-11-09 01:15:54,859 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 01:15:54,859 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:15:54,859 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:15:54,860 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:15:54,860 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:15:55,400 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:15:56,884 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7175#(and (<= 1 |#StackHeapBarrier|) (<= 2 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= 2 |ULTIMATE.start_main_~#volArray~0#1.base|))' at error location [2024-11-09 01:15:56,884 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:15:56,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:15:56,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 24] total 69 [2024-11-09 01:15:56,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009974537] [2024-11-09 01:15:56,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:15:56,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-11-09 01:15:56,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:15:56,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-11-09 01:15:56,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=5248, Unknown=0, NotChecked=0, Total=5550 [2024-11-09 01:15:56,886 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 69 states, 69 states have (on average 3.0144927536231885) internal successors, (208), 69 states have internal predecessors, (208), 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) [2024-11-09 01:16:06,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:16:06,820 INFO L93 Difference]: Finished difference Result 112 states and 129 transitions. [2024-11-09 01:16:06,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-09 01:16:06,821 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.0144927536231885) internal successors, (208), 69 states have internal predecessors, (208), 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 71 [2024-11-09 01:16:06,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:16:06,822 INFO L225 Difference]: With dead ends: 112 [2024-11-09 01:16:06,822 INFO L226 Difference]: Without dead ends: 110 [2024-11-09 01:16:06,823 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 155 SyntacticMatches, 8 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3777 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=883, Invalid=11327, Unknown=0, NotChecked=0, Total=12210 [2024-11-09 01:16:06,824 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 409 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 2704 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 2870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 2704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2024-11-09 01:16:06,824 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 492 Invalid, 2870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 2704 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2024-11-09 01:16:06,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-11-09 01:16:06,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 76. [2024-11-09 01:16:06,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 states have internal predecessors, (77), 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) [2024-11-09 01:16:06,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2024-11-09 01:16:06,852 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 71 [2024-11-09 01:16:06,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:16:06,852 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2024-11-09 01:16:06,853 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.0144927536231885) internal successors, (208), 69 states have internal predecessors, (208), 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) [2024-11-09 01:16:06,853 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2024-11-09 01:16:06,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-09 01:16:06,853 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:16:06,853 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:16:06,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-09 01:16:07,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:16:07,054 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:16:07,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:16:07,054 INFO L85 PathProgramCache]: Analyzing trace with hash 34833456, now seen corresponding path program 15 times [2024-11-09 01:16:07,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:16:07,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186588096] [2024-11-09 01:16:07,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:16:07,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:16:07,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:16:08,898 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:16:08,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:16:08,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186588096] [2024-11-09 01:16:08,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186588096] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:16:08,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789068513] [2024-11-09 01:16:08,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 01:16:08,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:16:08,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:16:08,900 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:16:08,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 01:16:09,099 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 01:16:09,099 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:16:09,101 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-09 01:16:09,104 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:16:09,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 44 [2024-11-09 01:16:09,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 01:16:09,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-09 01:16:10,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 47 [2024-11-09 01:16:10,896 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:16:10,896 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:16:12,353 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:16:12,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 55 [2024-11-09 01:16:12,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 34 [2024-11-09 01:16:12,402 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 01:16:12,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2024-11-09 01:16:12,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2024-11-09 01:16:12,439 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:16:12,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789068513] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:16:12,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1440470480] [2024-11-09 01:16:12,440 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 01:16:12,440 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:16:12,441 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:16:12,441 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:16:12,441 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:16:12,968 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:16:14,758 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8008#(and (<= 1 |#StackHeapBarrier|) (<= 2 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= 2 |ULTIMATE.start_main_~#volArray~0#1.base|))' at error location [2024-11-09 01:16:14,758 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:16:14,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:16:14,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 63 [2024-11-09 01:16:14,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780148367] [2024-11-09 01:16:14,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:16:14,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-11-09 01:16:14,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:16:14,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-11-09 01:16:14,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=4477, Unknown=0, NotChecked=0, Total=4692 [2024-11-09 01:16:14,761 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 63 states, 63 states have (on average 3.2222222222222223) internal successors, (203), 63 states have internal predecessors, (203), 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) [2024-11-09 01:16:24,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:16:24,269 INFO L93 Difference]: Finished difference Result 120 states and 139 transitions. [2024-11-09 01:16:24,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-09 01:16:24,270 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.2222222222222223) internal successors, (203), 63 states have internal predecessors, (203), 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 75 [2024-11-09 01:16:24,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:16:24,271 INFO L225 Difference]: With dead ends: 120 [2024-11-09 01:16:24,271 INFO L226 Difference]: Without dead ends: 118 [2024-11-09 01:16:24,271 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 174 SyntacticMatches, 8 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2815 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=822, Invalid=10734, Unknown=0, NotChecked=0, Total=11556 [2024-11-09 01:16:24,272 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 400 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 2902 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 3104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 2902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2024-11-09 01:16:24,272 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 502 Invalid, 3104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 2902 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2024-11-09 01:16:24,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-11-09 01:16:24,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 80. [2024-11-09 01:16:24,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 79 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:16:24,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2024-11-09 01:16:24,299 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 75 [2024-11-09 01:16:24,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:16:24,299 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2024-11-09 01:16:24,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.2222222222222223) internal successors, (203), 63 states have internal predecessors, (203), 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) [2024-11-09 01:16:24,300 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2024-11-09 01:16:24,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-09 01:16:24,300 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:16:24,300 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:16:24,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-09 01:16:24,501 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 01:16:24,501 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:16:24,501 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:16:24,501 INFO L85 PathProgramCache]: Analyzing trace with hash 272323549, now seen corresponding path program 16 times [2024-11-09 01:16:24,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:16:24,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889433980] [2024-11-09 01:16:24,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:16:24,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:16:24,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:16:25,791 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 353 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:16:25,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:16:25,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889433980] [2024-11-09 01:16:25,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889433980] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:16:25,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331896645] [2024-11-09 01:16:25,791 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 01:16:25,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:16:25,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:16:25,793 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:16:25,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 01:16:26,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:16:26,027 INFO L255 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-09 01:16:26,029 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:16:27,274 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 406 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:16:27,274 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:16:28,439 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 406 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:16:28,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331896645] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:16:28,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1075738493] [2024-11-09 01:16:28,441 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 01:16:28,441 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:16:28,441 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:16:28,441 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:16:28,441 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:16:29,165 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:16:30,421 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8891#(and (<= 1 |#StackHeapBarrier|) (<= 2 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= 2 |ULTIMATE.start_main_~#volArray~0#1.base|))' at error location [2024-11-09 01:16:30,421 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:16:30,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:16:30,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 67 [2024-11-09 01:16:30,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230526788] [2024-11-09 01:16:30,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:16:30,422 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-11-09 01:16:30,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:16:30,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-11-09 01:16:30,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1095, Invalid=4161, Unknown=0, NotChecked=0, Total=5256 [2024-11-09 01:16:30,424 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 67 states, 67 states have (on average 3.208955223880597) internal successors, (215), 67 states have internal predecessors, (215), 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) [2024-11-09 01:16:32,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:16:32,033 INFO L93 Difference]: Finished difference Result 147 states and 149 transitions. [2024-11-09 01:16:32,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-09 01:16:32,033 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.208955223880597) internal successors, (215), 67 states have internal predecessors, (215), 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 79 [2024-11-09 01:16:32,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:16:32,034 INFO L225 Difference]: With dead ends: 147 [2024-11-09 01:16:32,034 INFO L226 Difference]: Without dead ends: 83 [2024-11-09 01:16:32,035 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 186 SyntacticMatches, 7 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4102 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2144, Invalid=8776, Unknown=0, NotChecked=0, Total=10920 [2024-11-09 01:16:32,035 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 151 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 01:16:32,036 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 133 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 01:16:32,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-09 01:16:32,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2024-11-09 01:16:32,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 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) [2024-11-09 01:16:32,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2024-11-09 01:16:32,073 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 79 [2024-11-09 01:16:32,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:16:32,073 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2024-11-09 01:16:32,073 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.208955223880597) internal successors, (215), 67 states have internal predecessors, (215), 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) [2024-11-09 01:16:32,073 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2024-11-09 01:16:32,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-09 01:16:32,073 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:16:32,074 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:16:32,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-09 01:16:32,274 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 01:16:32,274 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:16:32,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:16:32,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1883972293, now seen corresponding path program 17 times [2024-11-09 01:16:32,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:16:32,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383681788] [2024-11-09 01:16:32,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:16:32,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:16:32,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:16:34,550 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 0 proven. 470 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:16:34,550 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:16:34,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383681788] [2024-11-09 01:16:34,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383681788] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:16:34,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428652089] [2024-11-09 01:16:34,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:16:34,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:16:34,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:16:34,552 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:16:34,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-09 01:16:41,065 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-11-09 01:16:41,066 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:16:41,072 INFO L255 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-09 01:16:41,075 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:16:41,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 42 [2024-11-09 01:16:41,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 75 [2024-11-09 01:16:41,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 22 [2024-11-09 01:16:41,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-09 01:16:41,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 01:16:41,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-09 01:16:41,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 65 [2024-11-09 01:16:41,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-09 01:16:41,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 01:16:41,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 01:16:45,617 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:16:45,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 71 [2024-11-09 01:16:45,727 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 0 proven. 470 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:16:45,727 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:16:47,372 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:16:47,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 55 [2024-11-09 01:16:47,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 67 [2024-11-09 01:16:47,491 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 01:16:47,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 59 [2024-11-09 01:16:47,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2024-11-09 01:16:48,080 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 0 proven. 470 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:16:48,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428652089] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:16:48,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1789076808] [2024-11-09 01:16:48,082 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 01:16:48,082 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:16:48,082 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:16:48,082 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:16:48,083 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:16:48,544 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:16:50,757 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9812#(and (<= 1 |#StackHeapBarrier|) (<= 2 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= 2 |ULTIMATE.start_main_~#volArray~0#1.base|))' at error location [2024-11-09 01:16:50,757 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:16:50,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:16:50,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 27] total 78 [2024-11-09 01:16:50,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821646640] [2024-11-09 01:16:50,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:16:50,758 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2024-11-09 01:16:50,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:16:50,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2024-11-09 01:16:50,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=6623, Unknown=0, NotChecked=0, Total=6972 [2024-11-09 01:16:50,760 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 78 states, 78 states have (on average 3.051282051282051) internal successors, (238), 78 states have internal predecessors, (238), 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) [2024-11-09 01:17:03,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:17:03,942 INFO L93 Difference]: Finished difference Result 132 states and 153 transitions. [2024-11-09 01:17:03,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-09 01:17:03,942 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 3.051282051282051) internal successors, (238), 78 states have internal predecessors, (238), 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 81 [2024-11-09 01:17:03,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:17:03,943 INFO L225 Difference]: With dead ends: 132 [2024-11-09 01:17:03,943 INFO L226 Difference]: Without dead ends: 130 [2024-11-09 01:17:03,944 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 178 SyntacticMatches, 9 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4597 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=1143, Invalid=14859, Unknown=0, NotChecked=0, Total=16002 [2024-11-09 01:17:03,945 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 536 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 3638 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 3875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 3638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2024-11-09 01:17:03,945 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [536 Valid, 651 Invalid, 3875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 3638 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2024-11-09 01:17:03,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-11-09 01:17:03,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 90. [2024-11-09 01:17:03,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 89 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) [2024-11-09 01:17:03,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2024-11-09 01:17:03,998 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 81 [2024-11-09 01:17:03,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:17:03,998 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2024-11-09 01:17:03,999 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 3.051282051282051) internal successors, (238), 78 states have internal predecessors, (238), 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) [2024-11-09 01:17:03,999 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2024-11-09 01:17:03,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-09 01:17:04,000 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:17:04,000 INFO L215 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:17:04,025 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-09 01:17:04,200 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:17:04,200 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:17:04,200 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:17:04,201 INFO L85 PathProgramCache]: Analyzing trace with hash -252199265, now seen corresponding path program 18 times [2024-11-09 01:17:04,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:17:04,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453588380] [2024-11-09 01:17:04,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:17:04,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:17:04,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:17:05,938 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 467 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:17:05,939 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:17:05,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453588380] [2024-11-09 01:17:05,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453588380] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:17:05,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054069128] [2024-11-09 01:17:05,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 01:17:05,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:17:05,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:17:05,941 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:17:05,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-09 01:17:06,193 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 01:17:06,193 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:17:06,195 INFO L255 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-09 01:17:06,196 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:17:07,678 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 528 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:17:07,678 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:17:09,184 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 528 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:17:09,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054069128] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:17:09,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [270583680] [2024-11-09 01:17:09,186 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 01:17:09,186 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:17:09,186 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:17:09,186 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:17:09,186 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:17:09,580 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:17:11,133 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10800#(and (<= 1 |#StackHeapBarrier|) (<= 2 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= 2 |ULTIMATE.start_main_~#volArray~0#1.base|))' at error location [2024-11-09 01:17:11,133 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:17:11,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:17:11,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 75 [2024-11-09 01:17:11,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062694375] [2024-11-09 01:17:11,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:17:11,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2024-11-09 01:17:11,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:17:11,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2024-11-09 01:17:11,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1367, Invalid=5113, Unknown=0, NotChecked=0, Total=6480 [2024-11-09 01:17:11,135 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand has 75 states, 75 states have (on average 3.24) internal successors, (243), 75 states have internal predecessors, (243), 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) [2024-11-09 01:17:13,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:17:13,274 INFO L93 Difference]: Finished difference Result 165 states and 167 transitions. [2024-11-09 01:17:13,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-09 01:17:13,275 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.24) internal successors, (243), 75 states have internal predecessors, (243), 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 89 [2024-11-09 01:17:13,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:17:13,275 INFO L225 Difference]: With dead ends: 165 [2024-11-09 01:17:13,276 INFO L226 Difference]: Without dead ends: 93 [2024-11-09 01:17:13,277 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 210 SyntacticMatches, 8 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5149 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=2677, Invalid=10895, Unknown=0, NotChecked=0, Total=13572 [2024-11-09 01:17:13,277 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 174 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 01:17:13,278 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 181 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 01:17:13,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-09 01:17:13,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2024-11-09 01:17:13,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 states have internal predecessors, (93), 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) [2024-11-09 01:17:13,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2024-11-09 01:17:13,320 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 89 [2024-11-09 01:17:13,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:17:13,320 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2024-11-09 01:17:13,320 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.24) internal successors, (243), 75 states have internal predecessors, (243), 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) [2024-11-09 01:17:13,320 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2024-11-09 01:17:13,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-11-09 01:17:13,321 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:17:13,321 INFO L215 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:17:13,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-09 01:17:13,521 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:17:13,522 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:17:13,522 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:17:13,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1050670201, now seen corresponding path program 19 times [2024-11-09 01:17:13,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:17:13,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728938939] [2024-11-09 01:17:13,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:17:13,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:17:13,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:17:15,985 INFO L134 CoverageAnalysis]: Checked inductivity of 609 backedges. 0 proven. 609 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:17:15,985 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:17:15,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728938939] [2024-11-09 01:17:15,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728938939] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:17:15,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262974757] [2024-11-09 01:17:15,986 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 01:17:15,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:17:15,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:17:15,987 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:17:15,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-09 01:17:16,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:17:16,329 INFO L255 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-11-09 01:17:16,333 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:17:17,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 38 [2024-11-09 01:17:17,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 65 [2024-11-09 01:17:17,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 18 [2024-11-09 01:17:17,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 94 [2024-11-09 01:17:17,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 50 [2024-11-09 01:17:17,314 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 01:17:17,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2024-11-09 01:17:17,336 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 01:17:17,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 3 [2024-11-09 01:17:17,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2024-11-09 01:17:17,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-09 01:17:21,561 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:17:21,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 68 [2024-11-09 01:17:21,645 INFO L134 CoverageAnalysis]: Checked inductivity of 609 backedges. 0 proven. 609 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:17:21,645 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:17:23,755 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:17:23,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 55 [2024-11-09 01:17:23,866 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 01:17:23,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2024-11-09 01:17:23,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2024-11-09 01:17:24,741 INFO L134 CoverageAnalysis]: Checked inductivity of 609 backedges. 0 proven. 609 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:17:24,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262974757] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:17:24,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [178966280] [2024-11-09 01:17:24,742 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 01:17:24,743 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:17:24,743 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:17:24,743 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:17:24,743 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:17:25,464 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:17:28,319 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11834#(and (<= 1 |#StackHeapBarrier|) (<= 2 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= 2 |ULTIMATE.start_main_~#volArray~0#1.base|))' at error location [2024-11-09 01:17:28,320 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:17:28,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:17:28,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 30] total 87 [2024-11-09 01:17:28,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73874201] [2024-11-09 01:17:28,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:17:28,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2024-11-09 01:17:28,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:17:28,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2024-11-09 01:17:28,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=8203, Unknown=0, NotChecked=0, Total=8556 [2024-11-09 01:17:28,322 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand has 87 states, 87 states have (on average 3.0804597701149423) internal successors, (268), 87 states have internal predecessors, (268), 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) [2024-11-09 01:17:45,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:17:45,498 INFO L93 Difference]: Finished difference Result 144 states and 167 transitions. [2024-11-09 01:17:45,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-11-09 01:17:45,499 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 3.0804597701149423) internal successors, (268), 87 states have internal predecessors, (268), 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 91 [2024-11-09 01:17:45,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:17:45,500 INFO L225 Difference]: With dead ends: 144 [2024-11-09 01:17:45,500 INFO L226 Difference]: Without dead ends: 142 [2024-11-09 01:17:45,502 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 201 SyntacticMatches, 10 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5185 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=1367, Invalid=19225, Unknown=0, NotChecked=0, Total=20592 [2024-11-09 01:17:45,502 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 624 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 4680 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 5001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 4680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2024-11-09 01:17:45,503 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 844 Invalid, 5001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 4680 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2024-11-09 01:17:45,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-11-09 01:17:45,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 96. [2024-11-09 01:17:45,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 95 states have internal predecessors, (97), 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) [2024-11-09 01:17:45,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2024-11-09 01:17:45,548 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 91 [2024-11-09 01:17:45,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:17:45,548 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2024-11-09 01:17:45,548 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 3.0804597701149423) internal successors, (268), 87 states have internal predecessors, (268), 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) [2024-11-09 01:17:45,548 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2024-11-09 01:17:45,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-09 01:17:45,549 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:17:45,549 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:17:45,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-09 01:17:45,749 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-09 01:17:45,749 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:17:45,750 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:17:45,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1128900684, now seen corresponding path program 20 times [2024-11-09 01:17:45,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:17:45,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264895780] [2024-11-09 01:17:45,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:17:45,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:17:45,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:17:47,881 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:17:47,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:17:47,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264895780] [2024-11-09 01:17:47,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264895780] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:17:47,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93677177] [2024-11-09 01:17:47,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:17:47,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:17:47,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:17:47,883 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:17:47,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-09 01:18:10,324 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2024-11-09 01:18:10,325 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:18:10,336 INFO L255 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-09 01:18:10,339 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:18:10,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 01:18:10,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 01:18:13,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 53 [2024-11-09 01:18:13,155 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:18:13,155 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:18:15,454 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:18:15,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 55 [2024-11-09 01:18:15,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 41 [2024-11-09 01:18:15,497 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 01:18:15,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 33 [2024-11-09 01:18:15,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2024-11-09 01:18:16,342 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:18:16,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93677177] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:18:16,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [800739665] [2024-11-09 01:18:16,344 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 01:18:16,344 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:18:16,344 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:18:16,344 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:18:16,345 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:18:16,718 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:18:19,230 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12904#(and (<= 1 |#StackHeapBarrier|) (<= 2 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= 2 |ULTIMATE.start_main_~#volArray~0#1.base|))' at error location [2024-11-09 01:18:19,231 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:18:19,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:18:19,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 31] total 80 [2024-11-09 01:18:19,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695164820] [2024-11-09 01:18:19,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:18:19,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2024-11-09 01:18:19,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:18:19,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2024-11-09 01:18:19,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=6988, Unknown=0, NotChecked=0, Total=7310 [2024-11-09 01:18:19,234 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 80 states, 80 states have (on average 3.2625) internal successors, (261), 80 states have internal predecessors, (261), 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) [2024-11-09 01:18:35,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:18:35,541 INFO L93 Difference]: Finished difference Result 152 states and 177 transitions. [2024-11-09 01:18:35,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-09 01:18:35,542 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.2625) internal successors, (261), 80 states have internal predecessors, (261), 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 95 [2024-11-09 01:18:35,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:18:35,543 INFO L225 Difference]: With dead ends: 152 [2024-11-09 01:18:35,543 INFO L226 Difference]: Without dead ends: 150 [2024-11-09 01:18:35,545 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 221 SyntacticMatches, 10 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4886 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=1300, Invalid=17332, Unknown=0, NotChecked=0, Total=18632 [2024-11-09 01:18:35,545 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 490 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 4656 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 854 SdHoareTripleChecker+Invalid, 4980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 4656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2024-11-09 01:18:35,546 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 854 Invalid, 4980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 4656 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2024-11-09 01:18:35,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-11-09 01:18:35,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 100. [2024-11-09 01:18:35,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.02020202020202) internal successors, (101), 99 states have internal predecessors, (101), 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) [2024-11-09 01:18:35,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2024-11-09 01:18:35,606 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 95 [2024-11-09 01:18:35,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:18:35,606 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2024-11-09 01:18:35,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.2625) internal successors, (261), 80 states have internal predecessors, (261), 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) [2024-11-09 01:18:35,606 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2024-11-09 01:18:35,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-09 01:18:35,607 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:18:35,607 INFO L215 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:18:35,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-09 01:18:35,807 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-09 01:18:35,808 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:18:35,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:18:35,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1317061985, now seen corresponding path program 21 times [2024-11-09 01:18:35,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:18:35,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722828649] [2024-11-09 01:18:35,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:18:35,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:18:35,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:18:37,559 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 597 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:18:37,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:18:37,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722828649] [2024-11-09 01:18:37,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722828649] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:18:37,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227763708] [2024-11-09 01:18:37,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 01:18:37,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:18:37,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:18:37,561 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:18:37,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-09 01:18:37,856 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 01:18:37,856 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:18:37,858 INFO L255 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-09 01:18:37,860 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:18:39,652 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 666 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:18:39,652 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:18:41,359 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 666 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:18:41,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227763708] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:18:41,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [864871803] [2024-11-09 01:18:41,361 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 01:18:41,361 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:18:41,361 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:18:41,361 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:18:41,361 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:18:41,769 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:18:43,649 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14017#(and (<= 1 |#StackHeapBarrier|) (<= 2 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= 2 |ULTIMATE.start_main_~#volArray~0#1.base|))' at error location [2024-11-09 01:18:43,650 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:18:43,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:18:43,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 83 [2024-11-09 01:18:43,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203053655] [2024-11-09 01:18:43,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:18:43,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2024-11-09 01:18:43,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:18:43,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2024-11-09 01:18:43,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1670, Invalid=6162, Unknown=0, NotChecked=0, Total=7832 [2024-11-09 01:18:43,652 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 83 states, 83 states have (on average 3.2650602409638556) internal successors, (271), 83 states have internal predecessors, (271), 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) [2024-11-09 01:18:46,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:18:46,471 INFO L93 Difference]: Finished difference Result 183 states and 185 transitions. [2024-11-09 01:18:46,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-09 01:18:46,471 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 3.2650602409638556) internal successors, (271), 83 states have internal predecessors, (271), 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 99 [2024-11-09 01:18:46,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:18:46,472 INFO L225 Difference]: With dead ends: 183 [2024-11-09 01:18:46,472 INFO L226 Difference]: Without dead ends: 103 [2024-11-09 01:18:46,473 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 234 SyntacticMatches, 9 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6314 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=3270, Invalid=13242, Unknown=0, NotChecked=0, Total=16512 [2024-11-09 01:18:46,474 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 247 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 01:18:46,474 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 188 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 01:18:46,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-11-09 01:18:46,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2024-11-09 01:18:46,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 101 states have internal predecessors, (103), 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) [2024-11-09 01:18:46,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2024-11-09 01:18:46,533 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 99 [2024-11-09 01:18:46,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:18:46,534 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2024-11-09 01:18:46,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.2650602409638556) internal successors, (271), 83 states have internal predecessors, (271), 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) [2024-11-09 01:18:46,534 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2024-11-09 01:18:46,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-11-09 01:18:46,535 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:18:46,535 INFO L215 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:18:46,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-09 01:18:46,735 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:18:46,736 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:18:46,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:18:46,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1858334647, now seen corresponding path program 22 times [2024-11-09 01:18:46,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:18:46,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402430362] [2024-11-09 01:18:46,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:18:46,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:18:46,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:18:49,581 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 0 proven. 766 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:18:49,582 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:18:49,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402430362] [2024-11-09 01:18:49,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402430362] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:18:49,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252410813] [2024-11-09 01:18:49,582 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 01:18:49,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:18:49,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:18:49,583 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:18:49,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-09 01:18:49,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:18:49,963 INFO L255 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-11-09 01:18:49,967 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:18:50,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 38 [2024-11-09 01:18:50,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 65 [2024-11-09 01:18:50,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 18 [2024-11-09 01:18:50,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-09 01:18:50,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 55 [2024-11-09 01:18:51,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-09 01:18:51,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-09 01:18:55,934 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:18:55,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 68 [2024-11-09 01:18:56,042 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 0 proven. 766 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:18:56,042 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:18:58,583 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:18:58,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 55 [2024-11-09 01:18:58,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 41 [2024-11-09 01:18:58,704 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 01:18:58,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 33 [2024-11-09 01:18:58,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2024-11-09 01:18:59,826 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 0 proven. 766 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:18:59,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252410813] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:18:59,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [782872871] [2024-11-09 01:18:59,827 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 01:18:59,827 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:18:59,828 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:18:59,828 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:18:59,828 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:19:00,238 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:19:03,359 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15164#(and (<= 1 |#StackHeapBarrier|) (<= 2 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= 2 |ULTIMATE.start_main_~#volArray~0#1.base|))' at error location [2024-11-09 01:19:03,359 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:19:03,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:19:03,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 33] total 96 [2024-11-09 01:19:03,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970517047] [2024-11-09 01:19:03,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:19:03,360 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2024-11-09 01:19:03,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:19:03,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2024-11-09 01:19:03,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=9914, Unknown=0, NotChecked=0, Total=10302 [2024-11-09 01:19:03,362 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand has 96 states, 96 states have (on average 3.1041666666666665) internal successors, (298), 96 states have internal predecessors, (298), 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) [2024-11-09 01:19:24,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:19:24,384 INFO L93 Difference]: Finished difference Result 160 states and 186 transitions. [2024-11-09 01:19:24,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-11-09 01:19:24,385 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 3.1041666666666665) internal successors, (298), 96 states have internal predecessors, (298), 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 101 [2024-11-09 01:19:24,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:19:24,386 INFO L225 Difference]: With dead ends: 160 [2024-11-09 01:19:24,386 INFO L226 Difference]: Without dead ends: 158 [2024-11-09 01:19:24,388 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 224 SyntacticMatches, 11 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6356 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=1600, Invalid=23522, Unknown=0, NotChecked=0, Total=25122 [2024-11-09 01:19:24,388 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 733 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 5613 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 733 SdHoareTripleChecker+Valid, 1052 SdHoareTripleChecker+Invalid, 6003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 5613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2024-11-09 01:19:24,389 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [733 Valid, 1052 Invalid, 6003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 5613 Invalid, 0 Unknown, 0 Unchecked, 9.0s Time] [2024-11-09 01:19:24,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-11-09 01:19:24,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 106. [2024-11-09 01:19:24,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.019047619047619) internal successors, (107), 105 states have internal predecessors, (107), 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) [2024-11-09 01:19:24,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2024-11-09 01:19:24,448 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 101 [2024-11-09 01:19:24,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:19:24,448 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2024-11-09 01:19:24,448 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 3.1041666666666665) internal successors, (298), 96 states have internal predecessors, (298), 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) [2024-11-09 01:19:24,448 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2024-11-09 01:19:24,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-11-09 01:19:24,449 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:19:24,449 INFO L215 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:19:24,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-09 01:19:24,649 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:19:24,650 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:19:24,650 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:19:24,650 INFO L85 PathProgramCache]: Analyzing trace with hash -2120340618, now seen corresponding path program 23 times [2024-11-09 01:19:24,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:19:24,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954091993] [2024-11-09 01:19:24,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:19:24,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:19:24,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:19:27,426 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:19:27,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:19:27,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954091993] [2024-11-09 01:19:27,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954091993] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:19:27,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326229502] [2024-11-09 01:19:27,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:19:27,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:19:27,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:19:27,428 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:19:27,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-09 01:19:48,180 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2024-11-09 01:19:48,180 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:19:48,190 INFO L255 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-11-09 01:19:48,193 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:19:48,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 01:19:48,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 01:19:51,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 53 [2024-11-09 01:19:51,254 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:19:51,254 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:19:54,043 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:19:54,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 55 [2024-11-09 01:19:54,094 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 01:19:54,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2024-11-09 01:19:54,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2024-11-09 01:19:55,045 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:19:55,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326229502] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:19:55,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1809992942] [2024-11-09 01:19:55,047 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 01:19:55,047 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:19:55,047 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:19:55,047 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:19:55,047 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:19:55,466 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:19:58,306 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16349#(and (<= 1 |#StackHeapBarrier|) (<= 2 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= 2 |ULTIMATE.start_main_~#volArray~0#1.base|))' at error location [2024-11-09 01:19:58,306 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:19:58,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:19:58,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 34] total 88 [2024-11-09 01:19:58,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097585386] [2024-11-09 01:19:58,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:19:58,307 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2024-11-09 01:19:58,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:19:58,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2024-11-09 01:19:58,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=8389, Unknown=0, NotChecked=0, Total=8742 [2024-11-09 01:19:58,309 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand has 88 states, 88 states have (on average 3.284090909090909) internal successors, (289), 88 states have internal predecessors, (289), 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) [2024-11-09 01:20:17,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:20:17,584 INFO L93 Difference]: Finished difference Result 168 states and 196 transitions. [2024-11-09 01:20:17,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-11-09 01:20:17,585 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 3.284090909090909) internal successors, (289), 88 states have internal predecessors, (289), 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 105 [2024-11-09 01:20:17,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:20:17,586 INFO L225 Difference]: With dead ends: 168 [2024-11-09 01:20:17,586 INFO L226 Difference]: Without dead ends: 166 [2024-11-09 01:20:17,587 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 245 SyntacticMatches, 11 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5963 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=1525, Invalid=21125, Unknown=0, NotChecked=0, Total=22650 [2024-11-09 01:20:17,588 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 643 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 5461 mSolverCounterSat, 433 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 991 SdHoareTripleChecker+Invalid, 5894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 433 IncrementalHoareTripleChecker+Valid, 5461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2024-11-09 01:20:17,589 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [643 Valid, 991 Invalid, 5894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [433 Valid, 5461 Invalid, 0 Unknown, 0 Unchecked, 9.0s Time] [2024-11-09 01:20:17,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-11-09 01:20:17,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 110. [2024-11-09 01:20:17,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.018348623853211) internal successors, (111), 109 states have internal predecessors, (111), 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) [2024-11-09 01:20:17,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2024-11-09 01:20:17,663 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 105 [2024-11-09 01:20:17,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:20:17,663 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2024-11-09 01:20:17,664 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 3.284090909090909) internal successors, (289), 88 states have internal predecessors, (289), 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) [2024-11-09 01:20:17,664 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2024-11-09 01:20:17,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-11-09 01:20:17,664 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:20:17,664 INFO L215 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:20:17,695 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-09 01:20:17,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:20:17,865 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:20:17,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:20:17,865 INFO L85 PathProgramCache]: Analyzing trace with hash -269162461, now seen corresponding path program 24 times [2024-11-09 01:20:17,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:20:17,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029103884] [2024-11-09 01:20:17,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:20:17,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:20:17,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:20:19,595 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 743 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:20:19,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:20:19,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029103884] [2024-11-09 01:20:19,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029103884] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:20:19,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725546024] [2024-11-09 01:20:19,596 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 01:20:19,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:20:19,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:20:19,597 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:20:19,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-09 01:20:19,942 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 01:20:19,942 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:20:19,944 INFO L255 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-09 01:20:19,946 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:20:22,013 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 820 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:20:22,013 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:20:24,255 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 820 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:20:24,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725546024] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:20:24,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1681622848] [2024-11-09 01:20:24,256 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 01:20:24,257 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:20:24,257 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:20:24,257 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:20:24,257 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:20:26,697 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:20:28,826 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17577#(and (<= 1 |#StackHeapBarrier|) (<= 2 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= 2 |ULTIMATE.start_main_~#volArray~0#1.base|))' at error location [2024-11-09 01:20:28,826 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:20:28,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:20:28,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 91 [2024-11-09 01:20:28,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49233215] [2024-11-09 01:20:28,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:20:28,827 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2024-11-09 01:20:28,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:20:28,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2024-11-09 01:20:28,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2004, Invalid=7308, Unknown=0, NotChecked=0, Total=9312 [2024-11-09 01:20:28,828 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand has 91 states, 91 states have (on average 3.2857142857142856) internal successors, (299), 91 states have internal predecessors, (299), 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) [2024-11-09 01:20:31,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:20:31,509 INFO L93 Difference]: Finished difference Result 201 states and 203 transitions. [2024-11-09 01:20:31,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-09 01:20:31,509 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 3.2857142857142856) internal successors, (299), 91 states have internal predecessors, (299), 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 109 [2024-11-09 01:20:31,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:20:31,510 INFO L225 Difference]: With dead ends: 201 [2024-11-09 01:20:31,510 INFO L226 Difference]: Without dead ends: 113 [2024-11-09 01:20:31,512 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 258 SyntacticMatches, 10 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7597 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=3923, Invalid=15817, Unknown=0, NotChecked=0, Total=19740 [2024-11-09 01:20:31,513 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 243 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 01:20:31,513 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 207 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 01:20:31,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-11-09 01:20:31,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2024-11-09 01:20:31,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.018018018018018) internal successors, (113), 111 states have internal predecessors, (113), 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) [2024-11-09 01:20:31,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2024-11-09 01:20:31,577 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 109 [2024-11-09 01:20:31,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:20:31,578 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2024-11-09 01:20:31,578 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 3.2857142857142856) internal successors, (299), 91 states have internal predecessors, (299), 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) [2024-11-09 01:20:31,578 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2024-11-09 01:20:31,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-11-09 01:20:31,578 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:20:31,579 INFO L215 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:20:31,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-09 01:20:31,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-09 01:20:31,779 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:20:31,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:20:31,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1339928843, now seen corresponding path program 25 times [2024-11-09 01:20:31,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:20:31,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603559490] [2024-11-09 01:20:31,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:20:31,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:20:31,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:20:34,554 INFO L134 CoverageAnalysis]: Checked inductivity of 941 backedges. 0 proven. 941 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:20:34,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:20:34,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603559490] [2024-11-09 01:20:34,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603559490] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:20:34,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443390132] [2024-11-09 01:20:34,555 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 01:20:34,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:20:34,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:20:34,556 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:20:34,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-09 01:20:34,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:20:34,951 INFO L255 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 78 conjuncts are in the unsatisfiable core [2024-11-09 01:20:34,955 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:20:35,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 01:20:35,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 40 [2024-11-09 01:20:36,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 70 [2024-11-09 01:20:36,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 100 [2024-11-09 01:20:36,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 89 [2024-11-09 01:20:36,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 23 [2024-11-09 01:20:36,163 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 01:20:36,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 01:20:36,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-09 01:20:36,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 27 [2024-11-09 01:20:36,207 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 01:20:36,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 01:20:36,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-09 01:20:36,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 18 [2024-11-09 01:20:36,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2024-11-09 01:20:41,624 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:20:41,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 66 [2024-11-09 01:20:41,748 INFO L134 CoverageAnalysis]: Checked inductivity of 941 backedges. 0 proven. 941 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:20:41,748 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:20:44,846 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:20:44,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 55 [2024-11-09 01:20:44,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 67 [2024-11-09 01:20:44,957 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 01:20:44,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 59 [2024-11-09 01:20:44,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2024-11-09 01:20:46,112 INFO L134 CoverageAnalysis]: Checked inductivity of 941 backedges. 0 proven. 941 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:20:46,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443390132] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:20:46,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1583084130] [2024-11-09 01:20:46,113 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 01:20:46,113 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:20:46,114 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:20:46,114 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:20:46,114 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:20:46,580 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:20:49,921 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18837#(and (<= 1 |#StackHeapBarrier|) (<= 2 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= 2 |ULTIMATE.start_main_~#volArray~0#1.base|))' at error location [2024-11-09 01:20:49,922 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:20:49,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:20:49,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 36] total 105 [2024-11-09 01:20:49,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071399855] [2024-11-09 01:20:49,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:20:49,923 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2024-11-09 01:20:49,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:20:49,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2024-11-09 01:20:49,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=11830, Unknown=0, NotChecked=0, Total=12210 [2024-11-09 01:20:49,924 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand has 105 states, 105 states have (on average 3.123809523809524) internal successors, (328), 105 states have internal predecessors, (328), 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) [2024-11-09 01:21:19,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:21:19,900 INFO L93 Difference]: Finished difference Result 176 states and 205 transitions. [2024-11-09 01:21:19,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-11-09 01:21:19,901 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 3.123809523809524) internal successors, (328), 105 states have internal predecessors, (328), 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 111 [2024-11-09 01:21:19,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:21:19,901 INFO L225 Difference]: With dead ends: 176 [2024-11-09 01:21:19,901 INFO L226 Difference]: Without dead ends: 174 [2024-11-09 01:21:19,902 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 247 SyntacticMatches, 12 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6393 ImplicationChecksByTransitivity, 29.3s TimeCoverageRelationStatistics Valid=1807, Invalid=28295, Unknown=0, NotChecked=0, Total=30102 [2024-11-09 01:21:19,903 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 947 mSDsluCounter, 1289 mSDsCounter, 0 mSdLazyCounter, 7324 mSolverCounterSat, 492 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 947 SdHoareTripleChecker+Valid, 1313 SdHoareTripleChecker+Invalid, 7816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 492 IncrementalHoareTripleChecker+Valid, 7324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2024-11-09 01:21:19,903 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [947 Valid, 1313 Invalid, 7816 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [492 Valid, 7324 Invalid, 0 Unknown, 0 Unchecked, 11.7s Time] [2024-11-09 01:21:19,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2024-11-09 01:21:19,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 116. [2024-11-09 01:21:19,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.017391304347826) internal successors, (117), 115 states have internal predecessors, (117), 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) [2024-11-09 01:21:19,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2024-11-09 01:21:19,975 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 111 [2024-11-09 01:21:19,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:21:19,975 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2024-11-09 01:21:19,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 3.123809523809524) internal successors, (328), 105 states have internal predecessors, (328), 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) [2024-11-09 01:21:19,976 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2024-11-09 01:21:19,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-11-09 01:21:19,976 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:21:19,976 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:21:19,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-09 01:21:20,177 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-09 01:21:20,177 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:21:20,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:21:20,177 INFO L85 PathProgramCache]: Analyzing trace with hash -518153416, now seen corresponding path program 26 times [2024-11-09 01:21:20,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:21:20,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745186425] [2024-11-09 01:21:20,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:21:20,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:21:20,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:21:23,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:21:23,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:21:23,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745186425] [2024-11-09 01:21:23,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745186425] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:21:23,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018374911] [2024-11-09 01:21:23,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:21:23,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:21:23,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:21:23,281 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:21:23,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-09 01:22:17,426 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2024-11-09 01:22:17,426 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:22:17,440 INFO L255 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-11-09 01:22:17,443 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:22:17,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 01:22:17,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 01:22:20,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 53 [2024-11-09 01:22:20,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:22:20,565 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:22:23,463 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:22:23,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 55 [2024-11-09 01:22:23,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 41 [2024-11-09 01:22:23,507 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 01:22:23,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 33 [2024-11-09 01:22:23,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2024-11-09 01:22:24,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:22:24,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018374911] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:22:24,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [843428635] [2024-11-09 01:22:24,560 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 01:22:24,560 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:22:24,560 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:22:24,560 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:22:24,560 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:22:24,949 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:22:27,985 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20135#(and (<= 1 |#StackHeapBarrier|) (<= 2 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= 2 |ULTIMATE.start_main_~#volArray~0#1.base|))' at error location [2024-11-09 01:22:27,985 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:22:27,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:22:27,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 37] total 94 [2024-11-09 01:22:27,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996654790] [2024-11-09 01:22:27,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:22:27,986 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2024-11-09 01:22:27,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:22:27,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2024-11-09 01:22:27,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=9548, Unknown=0, NotChecked=0, Total=9900 [2024-11-09 01:22:27,988 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand has 94 states, 94 states have (on average 3.3085106382978724) internal successors, (311), 94 states have internal predecessors, (311), 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) [2024-11-09 01:22:51,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:22:51,093 INFO L93 Difference]: Finished difference Result 184 states and 215 transitions. [2024-11-09 01:22:51,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-11-09 01:22:51,094 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 3.3085106382978724) internal successors, (311), 94 states have internal predecessors, (311), 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 115 [2024-11-09 01:22:51,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:22:51,095 INFO L225 Difference]: With dead ends: 184 [2024-11-09 01:22:51,095 INFO L226 Difference]: Without dead ends: 182 [2024-11-09 01:22:51,096 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 271 SyntacticMatches, 12 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6925 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=1680, Invalid=24726, Unknown=0, NotChecked=0, Total=26406 [2024-11-09 01:22:51,097 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 755 mSDsluCounter, 1130 mSDsCounter, 0 mSdLazyCounter, 6237 mSolverCounterSat, 529 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 1155 SdHoareTripleChecker+Invalid, 6766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 529 IncrementalHoareTripleChecker+Valid, 6237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:22:51,097 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [755 Valid, 1155 Invalid, 6766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [529 Valid, 6237 Invalid, 0 Unknown, 0 Unchecked, 10.1s Time] [2024-11-09 01:22:51,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2024-11-09 01:22:51,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 120. [2024-11-09 01:22:51,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.0168067226890756) internal successors, (121), 119 states have internal predecessors, (121), 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) [2024-11-09 01:22:51,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2024-11-09 01:22:51,189 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 115 [2024-11-09 01:22:51,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:22:51,189 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2024-11-09 01:22:51,189 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 3.3085106382978724) internal successors, (311), 94 states have internal predecessors, (311), 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) [2024-11-09 01:22:51,189 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2024-11-09 01:22:51,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2024-11-09 01:22:51,190 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:22:51,190 INFO L215 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:22:51,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-11-09 01:22:51,390 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-09 01:22:51,391 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:22:51,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:22:51,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1630361883, now seen corresponding path program 27 times [2024-11-09 01:22:51,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:22:51,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529186601] [2024-11-09 01:22:51,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:22:51,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:22:51,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:22:53,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 905 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:22:53,271 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:22:53,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529186601] [2024-11-09 01:22:53,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529186601] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:22:53,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594778014] [2024-11-09 01:22:53,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 01:22:53,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:22:53,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:22:53,274 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:22:53,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-09 01:22:53,695 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 01:22:53,695 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:22:53,698 INFO L255 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-09 01:22:53,701 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:22:56,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 990 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:22:56,015 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:22:58,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 990 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:22:58,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594778014] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:22:58,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [402302986] [2024-11-09 01:22:58,306 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 01:22:58,307 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:22:58,307 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:22:58,307 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:22:58,307 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:22:58,731 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:23:00,978 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21478#(and (<= 1 |#StackHeapBarrier|) (<= 2 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= 2 |ULTIMATE.start_main_~#volArray~0#1.base|))' at error location [2024-11-09 01:23:00,978 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:23:00,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:23:00,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 99 [2024-11-09 01:23:00,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88271118] [2024-11-09 01:23:00,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:23:00,980 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2024-11-09 01:23:00,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:23:00,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2024-11-09 01:23:00,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2369, Invalid=8551, Unknown=0, NotChecked=0, Total=10920 [2024-11-09 01:23:00,983 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand has 99 states, 99 states have (on average 3.303030303030303) internal successors, (327), 99 states have internal predecessors, (327), 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) [2024-11-09 01:23:04,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:23:04,139 INFO L93 Difference]: Finished difference Result 219 states and 221 transitions. [2024-11-09 01:23:04,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-09 01:23:04,139 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 3.303030303030303) internal successors, (327), 99 states have internal predecessors, (327), 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 119 [2024-11-09 01:23:04,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:23:04,140 INFO L225 Difference]: With dead ends: 219 [2024-11-09 01:23:04,140 INFO L226 Difference]: Without dead ends: 123 [2024-11-09 01:23:04,142 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 282 SyntacticMatches, 11 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8998 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=4636, Invalid=18620, Unknown=0, NotChecked=0, Total=23256 [2024-11-09 01:23:04,143 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 280 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 01:23:04,143 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 227 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 01:23:04,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-11-09 01:23:04,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2024-11-09 01:23:04,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.0165289256198347) internal successors, (123), 121 states have internal predecessors, (123), 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) [2024-11-09 01:23:04,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2024-11-09 01:23:04,237 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 119 [2024-11-09 01:23:04,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:23:04,237 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2024-11-09 01:23:04,237 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 3.303030303030303) internal successors, (327), 99 states have internal predecessors, (327), 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) [2024-11-09 01:23:04,237 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2024-11-09 01:23:04,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-11-09 01:23:04,238 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:23:04,238 INFO L215 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:23:04,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-11-09 01:23:04,438 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-09 01:23:04,438 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:23:04,438 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:23:04,439 INFO L85 PathProgramCache]: Analyzing trace with hash -677155379, now seen corresponding path program 28 times [2024-11-09 01:23:04,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:23:04,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551142047] [2024-11-09 01:23:04,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:23:04,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:23:04,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:23:08,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 0 proven. 1134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:23:08,145 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:23:08,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551142047] [2024-11-09 01:23:08,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551142047] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:23:08,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283571991] [2024-11-09 01:23:08,145 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 01:23:08,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:23:08,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:23:08,146 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:23:08,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-09 01:23:08,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:23:08,598 INFO L255 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-11-09 01:23:08,602 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:23:09,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 01:23:09,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 40 [2024-11-09 01:23:09,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 77 [2024-11-09 01:23:09,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 18 [2024-11-09 01:23:09,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-09 01:23:09,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 01:23:09,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 60 [2024-11-09 01:23:09,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-09 01:23:09,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-09 01:23:09,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-11-09 01:23:16,879 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:23:16,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 69 [2024-11-09 01:23:17,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 0 proven. 1134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:23:17,002 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:23:20,495 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:23:20,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 55 [2024-11-09 01:23:20,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 73 [2024-11-09 01:23:20,565 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 01:23:20,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 65 [2024-11-09 01:23:20,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2024-11-09 01:23:21,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 0 proven. 1134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:23:21,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283571991] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:23:21,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1106694506] [2024-11-09 01:23:21,934 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 01:23:21,934 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:23:21,934 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:23:21,934 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:23:21,934 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:23:22,353 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:23:26,429 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22851#(and (<= 1 |#StackHeapBarrier|) (<= 2 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= 2 |ULTIMATE.start_main_~#volArray~0#1.base|))' at error location [2024-11-09 01:23:26,429 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:23:26,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:23:26,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 39] total 114 [2024-11-09 01:23:26,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070871800] [2024-11-09 01:23:26,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:23:26,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2024-11-09 01:23:26,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:23:26,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2024-11-09 01:23:26,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=13847, Unknown=0, NotChecked=0, Total=14280 [2024-11-09 01:23:26,431 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand has 114 states, 114 states have (on average 3.1403508771929824) internal successors, (358), 114 states have internal predecessors, (358), 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) [2024-11-09 01:24:05,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:24:05,413 INFO L93 Difference]: Finished difference Result 196 states and 229 transitions. [2024-11-09 01:24:05,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-11-09 01:24:05,414 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 3.1403508771929824) internal successors, (358), 114 states have internal predecessors, (358), 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 121 [2024-11-09 01:24:05,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:24:05,415 INFO L225 Difference]: With dead ends: 196 [2024-11-09 01:24:05,415 INFO L226 Difference]: Without dead ends: 194 [2024-11-09 01:24:05,417 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 270 SyntacticMatches, 13 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7624 ImplicationChecksByTransitivity, 37.1s TimeCoverageRelationStatistics Valid=2131, Invalid=33779, Unknown=0, NotChecked=0, Total=35910 [2024-11-09 01:24:05,418 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 1074 mSDsluCounter, 1586 mSDsCounter, 0 mSdLazyCounter, 8829 mSolverCounterSat, 571 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1074 SdHoareTripleChecker+Valid, 1612 SdHoareTripleChecker+Invalid, 9400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 571 IncrementalHoareTripleChecker+Valid, 8829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:24:05,418 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1074 Valid, 1612 Invalid, 9400 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [571 Valid, 8829 Invalid, 0 Unknown, 0 Unchecked, 15.1s Time] [2024-11-09 01:24:05,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2024-11-09 01:24:05,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 130. [2024-11-09 01:24:05,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.0155038759689923) internal successors, (131), 129 states have internal predecessors, (131), 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) [2024-11-09 01:24:05,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2024-11-09 01:24:05,529 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 121 [2024-11-09 01:24:05,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:24:05,529 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2024-11-09 01:24:05,529 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 3.1403508771929824) internal successors, (358), 114 states have internal predecessors, (358), 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) [2024-11-09 01:24:05,529 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2024-11-09 01:24:05,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-11-09 01:24:05,530 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:24:05,530 INFO L215 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:24:05,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-11-09 01:24:05,730 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:24:05,730 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:24:05,731 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:24:05,731 INFO L85 PathProgramCache]: Analyzing trace with hash 788038055, now seen corresponding path program 29 times [2024-11-09 01:24:05,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:24:05,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567993808] [2024-11-09 01:24:05,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:24:05,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:24:05,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:24:07,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1320 backedges. 1083 proven. 237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:24:07,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:24:07,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567993808] [2024-11-09 01:24:07,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567993808] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:24:07,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797036383] [2024-11-09 01:24:07,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:24:07,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:24:07,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:24:07,945 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:24:07,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-09 01:25:49,278 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2024-11-09 01:25:49,278 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:25:49,298 INFO L255 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-09 01:25:49,302 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:25:52,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1320 backedges. 1176 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:25:52,511 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:25:55,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1320 backedges. 1176 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:25:55,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797036383] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:25:55,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1699169496] [2024-11-09 01:25:55,953 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 01:25:55,953 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:25:55,954 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:25:55,954 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:25:55,954 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:25:56,464 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:25:59,775 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24305#(and (<= 1 |#StackHeapBarrier|) (<= 2 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= 2 |ULTIMATE.start_main_~#volArray~0#1.base|))' at error location [2024-11-09 01:25:59,775 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:25:59,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:25:59,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 107 [2024-11-09 01:25:59,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010785479] [2024-11-09 01:25:59,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:25:59,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2024-11-09 01:25:59,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:25:59,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2024-11-09 01:25:59,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2765, Invalid=9891, Unknown=0, NotChecked=0, Total=12656 [2024-11-09 01:25:59,777 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand has 107 states, 107 states have (on average 3.317757009345794) internal successors, (355), 107 states have internal predecessors, (355), 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) [2024-11-09 01:26:03,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:26:03,993 INFO L93 Difference]: Finished difference Result 237 states and 239 transitions. [2024-11-09 01:26:03,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-09 01:26:03,993 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 3.317757009345794) internal successors, (355), 107 states have internal predecessors, (355), 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 129 [2024-11-09 01:26:03,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:26:03,994 INFO L225 Difference]: With dead ends: 237 [2024-11-09 01:26:03,994 INFO L226 Difference]: Without dead ends: 133 [2024-11-09 01:26:03,996 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 306 SyntacticMatches, 12 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10517 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=5409, Invalid=21651, Unknown=0, NotChecked=0, Total=27060 [2024-11-09 01:26:03,996 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 279 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 01:26:03,997 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 254 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 01:26:03,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-11-09 01:26:04,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2024-11-09 01:26:04,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.015267175572519) internal successors, (133), 131 states have internal predecessors, (133), 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) [2024-11-09 01:26:04,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2024-11-09 01:26:04,144 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 129 [2024-11-09 01:26:04,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:26:04,144 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2024-11-09 01:26:04,144 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 3.317757009345794) internal successors, (355), 107 states have internal predecessors, (355), 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) [2024-11-09 01:26:04,144 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2024-11-09 01:26:04,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-11-09 01:26:04,145 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:26:04,145 INFO L215 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:26:04,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-11-09 01:26:04,345 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:26:04,345 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:26:04,345 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:26:04,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1967900303, now seen corresponding path program 30 times [2024-11-09 01:26:04,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:26:04,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862907710] [2024-11-09 01:26:04,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:26:04,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:26:04,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:26:08,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1345 backedges. 0 proven. 1345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:26:08,520 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:26:08,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862907710] [2024-11-09 01:26:08,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862907710] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:26:08,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075244656] [2024-11-09 01:26:08,520 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 01:26:08,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:26:08,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:26:08,521 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:26:08,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-09 01:26:09,102 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 01:26:09,102 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:26:09,106 INFO L255 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 88 conjuncts are in the unsatisfiable core [2024-11-09 01:26:09,111 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:26:10,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 44 [2024-11-09 01:26:10,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 73 [2024-11-09 01:26:10,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 33 [2024-11-09 01:26:10,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2024-11-09 01:26:10,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 126 [2024-11-09 01:26:10,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 64 [2024-11-09 01:26:10,371 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 01:26:10,371 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 01:26:10,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 22 [2024-11-09 01:26:10,387 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 01:26:10,388 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 01:26:10,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 22 [2024-11-09 01:26:10,430 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 01:26:10,431 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 01:26:10,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 16 [2024-11-09 01:26:10,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-09 01:26:10,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 01:26:10,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 25 [2024-11-09 01:26:10,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-09 01:26:10,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 01:26:18,339 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:26:18,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 67 [2024-11-09 01:26:18,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1345 backedges. 0 proven. 1345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:26:18,459 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:26:22,795 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:26:22,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 55 [2024-11-09 01:26:22,879 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 01:26:22,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2024-11-09 01:26:22,893 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 01:26:22,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2024-11-09 01:26:22,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1345 backedges. 0 proven. 1345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:26:22,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075244656] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:26:22,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1239707471] [2024-11-09 01:26:22,949 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 01:26:22,949 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:26:22,949 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:26:22,949 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:26:22,949 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:26:23,866 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:26:28,372 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25777#(and (<= 1 |#StackHeapBarrier|) (<= 2 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= 2 |ULTIMATE.start_main_~#volArray~0#1.base|))' at error location [2024-11-09 01:26:28,372 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:26:28,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:26:28,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 109 [2024-11-09 01:26:28,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944592711] [2024-11-09 01:26:28,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:26:28,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2024-11-09 01:26:28,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:26:28,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2024-11-09 01:26:28,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=12703, Unknown=0, NotChecked=0, Total=13110 [2024-11-09 01:26:28,375 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand has 109 states, 109 states have (on average 3.311926605504587) internal successors, (361), 109 states have internal predecessors, (361), 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) [2024-11-09 01:27:09,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:27:09,514 INFO L93 Difference]: Finished difference Result 212 states and 248 transitions. [2024-11-09 01:27:09,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2024-11-09 01:27:09,514 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 3.311926605504587) internal successors, (361), 109 states have internal predecessors, (361), 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 131 [2024-11-09 01:27:09,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:27:09,515 INFO L225 Difference]: With dead ends: 212 [2024-11-09 01:27:09,515 INFO L226 Difference]: Without dead ends: 210 [2024-11-09 01:27:09,517 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 307 SyntacticMatches, 14 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8612 ImplicationChecksByTransitivity, 38.7s TimeCoverageRelationStatistics Valid=2159, Invalid=32997, Unknown=0, NotChecked=0, Total=35156 [2024-11-09 01:27:09,518 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 996 mSDsluCounter, 1577 mSDsCounter, 0 mSdLazyCounter, 8709 mSolverCounterSat, 664 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 996 SdHoareTripleChecker+Valid, 1605 SdHoareTripleChecker+Invalid, 9373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 664 IncrementalHoareTripleChecker+Valid, 8709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.9s IncrementalHoareTripleChecker+Time [2024-11-09 01:27:09,518 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [996 Valid, 1605 Invalid, 9373 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [664 Valid, 8709 Invalid, 0 Unknown, 0 Unchecked, 16.9s Time] [2024-11-09 01:27:09,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2024-11-09 01:27:09,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 140. [2024-11-09 01:27:09,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.014388489208633) internal successors, (141), 139 states have internal predecessors, (141), 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) [2024-11-09 01:27:09,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 141 transitions. [2024-11-09 01:27:09,634 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 141 transitions. Word has length 131 [2024-11-09 01:27:09,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:27:09,634 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 141 transitions. [2024-11-09 01:27:09,635 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 3.311926605504587) internal successors, (361), 109 states have internal predecessors, (361), 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) [2024-11-09 01:27:09,635 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 141 transitions. [2024-11-09 01:27:09,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-11-09 01:27:09,635 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:27:09,635 INFO L215 NwaCegarLoop]: trace histogram [27, 27, 26, 26, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:27:09,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-11-09 01:27:09,836 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:27:09,836 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:27:09,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:27:09,836 INFO L85 PathProgramCache]: Analyzing trace with hash -2036008855, now seen corresponding path program 31 times [2024-11-09 01:27:09,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:27:09,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428006525] [2024-11-09 01:27:09,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:27:09,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:27:09,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:27:12,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1547 backedges. 1277 proven. 270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:27:12,527 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:27:12,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428006525] [2024-11-09 01:27:12,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428006525] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:27:12,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159112587] [2024-11-09 01:27:12,528 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 01:27:12,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:27:12,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:27:12,530 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:27:12,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-09 01:27:13,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:27:13,059 INFO L255 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-09 01:27:13,060 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:27:16,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1547 backedges. 1378 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:27:16,515 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:27:20,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1547 backedges. 1378 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:27:20,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159112587] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:27:20,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [533169921] [2024-11-09 01:27:20,014 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 01:27:20,014 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:27:20,014 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:27:20,014 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:27:20,015 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:27:20,434 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:27:23,925 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27340#(and (<= 1 |#StackHeapBarrier|) (<= 2 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= 2 |ULTIMATE.start_main_~#volArray~0#1.base|))' at error location [2024-11-09 01:27:23,925 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:27:23,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:27:23,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 115 [2024-11-09 01:27:23,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700949465] [2024-11-09 01:27:23,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:27:23,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2024-11-09 01:27:23,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:27:23,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2024-11-09 01:27:23,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3192, Invalid=11328, Unknown=0, NotChecked=0, Total=14520 [2024-11-09 01:27:23,929 INFO L87 Difference]: Start difference. First operand 140 states and 141 transitions. Second operand has 115 states, 115 states have (on average 3.3304347826086955) internal successors, (383), 115 states have internal predecessors, (383), 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) [2024-11-09 01:27:28,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:27:28,919 INFO L93 Difference]: Finished difference Result 255 states and 257 transitions. [2024-11-09 01:27:28,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-11-09 01:27:28,920 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 3.3304347826086955) internal successors, (383), 115 states have internal predecessors, (383), 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 139 [2024-11-09 01:27:28,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:27:28,921 INFO L225 Difference]: With dead ends: 255 [2024-11-09 01:27:28,921 INFO L226 Difference]: Without dead ends: 143 [2024-11-09 01:27:28,922 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 330 SyntacticMatches, 13 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12154 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=6242, Invalid=24910, Unknown=0, NotChecked=0, Total=31152 [2024-11-09 01:27:28,923 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 339 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 01:27:28,923 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 263 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 01:27:28,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-11-09 01:27:29,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2024-11-09 01:27:29,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.0141843971631206) internal successors, (143), 141 states have internal predecessors, (143), 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) [2024-11-09 01:27:29,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2024-11-09 01:27:29,069 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 139 [2024-11-09 01:27:29,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:27:29,069 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2024-11-09 01:27:29,069 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 3.3304347826086955) internal successors, (383), 115 states have internal predecessors, (383), 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) [2024-11-09 01:27:29,069 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2024-11-09 01:27:29,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2024-11-09 01:27:29,070 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:27:29,070 INFO L215 NwaCegarLoop]: trace histogram [27, 27, 26, 26, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:27:29,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-11-09 01:27:29,270 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:27:29,270 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:27:29,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:27:29,271 INFO L85 PathProgramCache]: Analyzing trace with hash -269141167, now seen corresponding path program 32 times [2024-11-09 01:27:29,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:27:29,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412982570] [2024-11-09 01:27:29,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:27:29,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:27:29,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:27:33,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1574 backedges. 0 proven. 1574 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:27:33,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:27:33,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412982570] [2024-11-09 01:27:33,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412982570] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:27:33,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412613882] [2024-11-09 01:27:33,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:27:33,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:27:33,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:27:33,649 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:27:33,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1cfa53-4d54-43c3-ae2c-cca37d1acdcd/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process