./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/prefixsum_iter.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_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/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_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/verifythis/prefixsum_iter.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/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_e2dd1980-2acb-4384-bddc-f19340a96b4c/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 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 07:20:43,919 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 07:20:43,980 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 07:20:43,984 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 07:20:43,985 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 07:20:44,007 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 07:20:44,008 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 07:20:44,008 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 07:20:44,009 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 07:20:44,009 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 07:20:44,010 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 07:20:44,010 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 07:20:44,010 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 07:20:44,011 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 07:20:44,011 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 07:20:44,012 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 07:20:44,012 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 07:20:44,012 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 07:20:44,013 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 07:20:44,013 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 07:20:44,014 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 07:20:44,014 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 07:20:44,015 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 07:20:44,015 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 07:20:44,016 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 07:20:44,016 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 07:20:44,016 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 07:20:44,017 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 07:20:44,017 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 07:20:44,017 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 07:20:44,018 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 07:20:44,018 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 07:20:44,018 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 07:20:44,019 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 07:20:44,019 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 07:20:44,020 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 07:20:44,020 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 07:20:44,020 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 07:20:44,021 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 07:20:44,021 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 07:20:44,021 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 07:20:44,022 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 07:20:44,022 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 07:20:44,022 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 07:20:44,023 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 07:20:44,023 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 07:20:44,023 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 07:20:44,024 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_e2dd1980-2acb-4384-bddc-f19340a96b4c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d [2024-11-09 07:20:44,322 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 07:20:44,358 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 07:20:44,362 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 07:20:44,365 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 07:20:44,366 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 07:20:44,368 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/verifythis/prefixsum_iter.c Unable to find full path for "g++" [2024-11-09 07:20:46,852 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 07:20:47,123 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 07:20:47,124 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/sv-benchmarks/c/verifythis/prefixsum_iter.c [2024-11-09 07:20:47,133 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/data/8ec129eef/bf237b3dd8934fdf846b7d1ac41babd7/FLAG004ceafd9 [2024-11-09 07:20:47,422 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/data/8ec129eef/bf237b3dd8934fdf846b7d1ac41babd7 [2024-11-09 07:20:47,425 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 07:20:47,427 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 07:20:47,428 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 07:20:47,429 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 07:20:47,435 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 07:20:47,436 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 07:20:47" (1/1) ... [2024-11-09 07:20:47,437 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ede67d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:20:47, skipping insertion in model container [2024-11-09 07:20:47,437 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 07:20:47" (1/1) ... [2024-11-09 07:20:47,463 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 07:20:47,674 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_e2dd1980-2acb-4384-bddc-f19340a96b4c/sv-benchmarks/c/verifythis/prefixsum_iter.c[526,539] [2024-11-09 07:20:47,712 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 07:20:47,726 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 07:20:47,740 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_e2dd1980-2acb-4384-bddc-f19340a96b4c/sv-benchmarks/c/verifythis/prefixsum_iter.c[526,539] [2024-11-09 07:20:47,758 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 07:20:47,776 INFO L204 MainTranslator]: Completed translation [2024-11-09 07:20:47,777 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:20:47 WrapperNode [2024-11-09 07:20:47,777 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 07:20:47,778 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 07:20:47,778 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 07:20:47,778 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 07:20:47,788 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:20:47" (1/1) ... [2024-11-09 07:20:47,801 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:20:47" (1/1) ... [2024-11-09 07:20:47,828 INFO L138 Inliner]: procedures = 22, calls = 33, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 123 [2024-11-09 07:20:47,829 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 07:20:47,830 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 07:20:47,830 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 07:20:47,831 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 07:20:47,843 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:20:47" (1/1) ... [2024-11-09 07:20:47,844 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:20:47" (1/1) ... [2024-11-09 07:20:47,848 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:20:47" (1/1) ... [2024-11-09 07:20:47,848 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:20:47" (1/1) ... [2024-11-09 07:20:47,857 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:20:47" (1/1) ... [2024-11-09 07:20:47,862 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:20:47" (1/1) ... [2024-11-09 07:20:47,864 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:20:47" (1/1) ... [2024-11-09 07:20:47,866 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:20:47" (1/1) ... [2024-11-09 07:20:47,869 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 07:20:47,870 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 07:20:47,870 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 07:20:47,871 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 07:20:47,872 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:20:47" (1/1) ... [2024-11-09 07:20:47,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 07:20:47,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:20:47,908 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 07:20:47,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 07:20:47,944 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 07:20:47,944 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-09 07:20:47,945 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-09 07:20:47,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 07:20:47,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 07:20:47,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 07:20:47,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 07:20:47,945 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 07:20:47,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 07:20:47,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2024-11-09 07:20:47,946 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2024-11-09 07:20:47,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 07:20:48,055 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 07:20:48,058 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 07:20:48,418 INFO L? ?]: Removed 53 outVars from TransFormulas that were not future-live. [2024-11-09 07:20:48,418 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 07:20:48,474 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 07:20:48,474 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 07:20:48,475 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:20:48 BoogieIcfgContainer [2024-11-09 07:20:48,475 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 07:20:48,479 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 07:20:48,479 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 07:20:48,483 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 07:20:48,484 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 07:20:47" (1/3) ... [2024-11-09 07:20:48,485 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a6e9a9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 07:20:48, skipping insertion in model container [2024-11-09 07:20:48,485 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:20:47" (2/3) ... [2024-11-09 07:20:48,485 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a6e9a9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 07:20:48, skipping insertion in model container [2024-11-09 07:20:48,486 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:20:48" (3/3) ... [2024-11-09 07:20:48,487 INFO L112 eAbstractionObserver]: Analyzing ICFG prefixsum_iter.c [2024-11-09 07:20:48,507 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 07:20:48,507 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 07:20:48,598 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 07:20:48,609 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;@4c6e5ef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 07:20:48,609 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 07:20:48,613 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 32 states have internal predecessors, (47), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:20:48,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-09 07:20:48,622 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:20:48,622 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:20:48,623 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:20:48,629 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:20:48,640 INFO L85 PathProgramCache]: Analyzing trace with hash 501424836, now seen corresponding path program 1 times [2024-11-09 07:20:48,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:20:48,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456804393] [2024-11-09 07:20:48,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:20:48,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:20:48,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:20:49,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:20:49,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:20:49,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456804393] [2024-11-09 07:20:49,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456804393] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:20:49,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:20:49,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 07:20:49,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686796305] [2024-11-09 07:20:49,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:20:49,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 07:20:49,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:20:49,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 07:20:49,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:20:49,500 INFO L87 Difference]: Start difference. First operand has 39 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 32 states have internal predecessors, (47), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:20:49,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:20:49,650 INFO L93 Difference]: Finished difference Result 63 states and 92 transitions. [2024-11-09 07:20:49,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 07:20:49,653 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2024-11-09 07:20:49,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:20:49,661 INFO L225 Difference]: With dead ends: 63 [2024-11-09 07:20:49,661 INFO L226 Difference]: Without dead ends: 39 [2024-11-09 07:20:49,664 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:20:49,668 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 24 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:20:49,669 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 141 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:20:49,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-09 07:20:49,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-11-09 07:20:49,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 32 states have (on average 1.40625) internal successors, (45), 32 states have internal predecessors, (45), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:20:49,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 53 transitions. [2024-11-09 07:20:49,711 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 53 transitions. Word has length 29 [2024-11-09 07:20:49,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:20:49,713 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 53 transitions. [2024-11-09 07:20:49,713 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:20:49,713 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 53 transitions. [2024-11-09 07:20:49,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-09 07:20:49,715 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:20:49,715 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:20:49,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 07:20:49,716 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:20:49,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:20:49,717 INFO L85 PathProgramCache]: Analyzing trace with hash 134514857, now seen corresponding path program 1 times [2024-11-09 07:20:49,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:20:49,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639753915] [2024-11-09 07:20:49,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:20:49,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:20:49,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:20:50,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 07:20:50,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:20:50,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639753915] [2024-11-09 07:20:50,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639753915] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:20:50,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65762330] [2024-11-09 07:20:50,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:20:50,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:20:50,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:20:50,648 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:20:50,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 07:20:50,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:20:50,797 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-09 07:20:50,807 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:20:51,001 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 11 treesize of output 7 [2024-11-09 07:20:51,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:20:51,124 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:20:51,185 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 15 treesize of output 13 [2024-11-09 07:20:51,189 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 14 treesize of output 12 [2024-11-09 07:20:51,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:20:51,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65762330] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:20:51,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2071350550] [2024-11-09 07:20:51,330 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2024-11-09 07:20:51,330 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:20:51,335 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:20:51,342 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:20:51,343 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:20:53,727 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 121 for LOIs [2024-11-09 07:20:53,826 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 75 for LOIs [2024-11-09 07:20:53,853 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:21:01,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2071350550] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:21:01,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:21:01,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [11, 9, 9] total 44 [2024-11-09 07:21:01,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340732695] [2024-11-09 07:21:01,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:21:01,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-09 07:21:01,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:21:01,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-09 07:21:01,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1732, Unknown=0, NotChecked=0, Total=1892 [2024-11-09 07:21:01,441 INFO L87 Difference]: Start difference. First operand 39 states and 53 transitions. Second operand has 26 states, 20 states have (on average 1.05) internal successors, (21), 19 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:21:05,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:21:07,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:21:07,451 INFO L93 Difference]: Finished difference Result 84 states and 114 transitions. [2024-11-09 07:21:07,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-09 07:21:07,452 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 20 states have (on average 1.05) internal successors, (21), 19 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 31 [2024-11-09 07:21:07,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:21:07,453 INFO L225 Difference]: With dead ends: 84 [2024-11-09 07:21:07,454 INFO L226 Difference]: Without dead ends: 65 [2024-11-09 07:21:07,455 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=232, Invalid=2420, Unknown=0, NotChecked=0, Total=2652 [2024-11-09 07:21:07,456 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 26 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 16 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2024-11-09 07:21:07,457 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 401 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 740 Invalid, 3 Unknown, 0 Unchecked, 3.8s Time] [2024-11-09 07:21:07,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-09 07:21:07,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2024-11-09 07:21:07,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 51 states have internal predecessors, (67), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-09 07:21:07,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 81 transitions. [2024-11-09 07:21:07,476 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 81 transitions. Word has length 31 [2024-11-09 07:21:07,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:21:07,477 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 81 transitions. [2024-11-09 07:21:07,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 20 states have (on average 1.05) internal successors, (21), 19 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:21:07,478 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 81 transitions. [2024-11-09 07:21:07,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-09 07:21:07,479 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:21:07,480 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:21:07,505 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 07:21:07,680 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:21:07,681 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:21:07,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:21:07,683 INFO L85 PathProgramCache]: Analyzing trace with hash 734775854, now seen corresponding path program 1 times [2024-11-09 07:21:07,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:21:07,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721599238] [2024-11-09 07:21:07,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:21:07,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:21:07,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:21:07,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:21:07,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:21:07,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721599238] [2024-11-09 07:21:07,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721599238] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:21:07,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140908263] [2024-11-09 07:21:07,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:21:07,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:21:07,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:21:07,928 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:21:07,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 07:21:08,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:21:08,053 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-09 07:21:08,057 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:21:08,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:21:08,206 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:21:08,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:21:08,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140908263] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:21:08,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1411156648] [2024-11-09 07:21:08,417 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2024-11-09 07:21:08,417 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:21:08,417 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:21:08,417 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:21:08,418 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:21:08,981 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 69 for LOIs [2024-11-09 07:21:08,999 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2024-11-09 07:21:09,013 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:21:11,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1411156648] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:21:11,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:21:11,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [8, 7, 9] total 42 [2024-11-09 07:21:11,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130908677] [2024-11-09 07:21:11,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:21:11,769 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-09 07:21:11,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:21:11,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-09 07:21:11,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1573, Unknown=1, NotChecked=0, Total=1722 [2024-11-09 07:21:11,771 INFO L87 Difference]: Start difference. First operand 63 states and 81 transitions. Second operand has 27 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 20 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:21:15,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:21:16,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:21:16,365 INFO L93 Difference]: Finished difference Result 132 states and 169 transitions. [2024-11-09 07:21:16,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-09 07:21:16,366 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 20 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 33 [2024-11-09 07:21:16,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:21:16,368 INFO L225 Difference]: With dead ends: 132 [2024-11-09 07:21:16,368 INFO L226 Difference]: Without dead ends: 76 [2024-11-09 07:21:16,369 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=223, Invalid=2532, Unknown=1, NotChecked=0, Total=2756 [2024-11-09 07:21:16,370 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 45 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:21:16,371 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 210 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 693 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2024-11-09 07:21:16,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-09 07:21:16,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 64. [2024-11-09 07:21:16,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 52 states have internal predecessors, (68), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-09 07:21:16,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 82 transitions. [2024-11-09 07:21:16,401 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 82 transitions. Word has length 33 [2024-11-09 07:21:16,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:21:16,402 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 82 transitions. [2024-11-09 07:21:16,402 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 20 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:21:16,402 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 82 transitions. [2024-11-09 07:21:16,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-09 07:21:16,403 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:21:16,403 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:21:16,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 07:21:16,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:21:16,607 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:21:16,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:21:16,608 INFO L85 PathProgramCache]: Analyzing trace with hash -216723472, now seen corresponding path program 1 times [2024-11-09 07:21:16,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:21:16,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876929797] [2024-11-09 07:21:16,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:21:16,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:21:16,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:21:16,843 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:21:16,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:21:16,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876929797] [2024-11-09 07:21:16,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876929797] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:21:16,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84244409] [2024-11-09 07:21:16,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:21:16,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:21:16,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:21:16,846 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:21:16,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 07:21:16,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:21:16,949 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 07:21:16,951 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:21:17,032 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:21:17,033 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:21:17,114 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:21:17,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84244409] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:21:17,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1265524985] [2024-11-09 07:21:17,118 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2024-11-09 07:21:17,118 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:21:17,118 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:21:17,119 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:21:17,119 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:21:18,614 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 121 for LOIs [2024-11-09 07:21:18,667 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 75 for LOIs [2024-11-09 07:21:18,681 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:21:25,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1265524985] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:21:25,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:21:25,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [8, 7, 7] total 36 [2024-11-09 07:21:25,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714799711] [2024-11-09 07:21:25,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:21:25,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-09 07:21:25,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:21:25,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-09 07:21:25,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1131, Unknown=0, NotChecked=0, Total=1260 [2024-11-09 07:21:25,147 INFO L87 Difference]: Start difference. First operand 64 states and 82 transitions. Second operand has 26 states, 20 states have (on average 1.15) internal successors, (23), 19 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:21:28,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:21:30,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:21:30,992 INFO L93 Difference]: Finished difference Result 77 states and 95 transitions. [2024-11-09 07:21:30,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-09 07:21:30,993 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 20 states have (on average 1.15) internal successors, (23), 19 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 35 [2024-11-09 07:21:30,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:21:30,994 INFO L225 Difference]: With dead ends: 77 [2024-11-09 07:21:30,994 INFO L226 Difference]: Without dead ends: 51 [2024-11-09 07:21:30,999 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 74 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=194, Invalid=1698, Unknown=0, NotChecked=0, Total=1892 [2024-11-09 07:21:31,000 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 12 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2024-11-09 07:21:31,000 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 503 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 918 Invalid, 2 Unknown, 0 Unchecked, 3.9s Time] [2024-11-09 07:21:31,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-09 07:21:31,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2024-11-09 07:21:31,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 states have internal predecessors, (56), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:21:31,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2024-11-09 07:21:31,022 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 35 [2024-11-09 07:21:31,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:21:31,023 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2024-11-09 07:21:31,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 20 states have (on average 1.15) internal successors, (23), 19 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:21:31,023 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2024-11-09 07:21:31,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-09 07:21:31,024 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:21:31,024 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:21:31,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 07:21:31,224 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:21:31,225 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:21:31,226 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:21:31,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1754839691, now seen corresponding path program 1 times [2024-11-09 07:21:31,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:21:31,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328570228] [2024-11-09 07:21:31,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:21:31,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:21:31,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:21:31,298 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 07:21:31,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:21:31,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328570228] [2024-11-09 07:21:31,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328570228] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:21:31,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:21:31,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 07:21:31,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417042286] [2024-11-09 07:21:31,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:21:31,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 07:21:31,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:21:31,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 07:21:31,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 07:21:31,300 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:21:31,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:21:31,373 INFO L93 Difference]: Finished difference Result 76 states and 100 transitions. [2024-11-09 07:21:31,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 07:21:31,374 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37 [2024-11-09 07:21:31,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:21:31,375 INFO L225 Difference]: With dead ends: 76 [2024-11-09 07:21:31,375 INFO L226 Difference]: Without dead ends: 52 [2024-11-09 07:21:31,375 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 07:21:31,376 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 8 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:21:31,376 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 108 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:21:31,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-09 07:21:31,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2024-11-09 07:21:31,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 43 states have internal predecessors, (55), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:21:31,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2024-11-09 07:21:31,397 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 37 [2024-11-09 07:21:31,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:21:31,398 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2024-11-09 07:21:31,398 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:21:31,398 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2024-11-09 07:21:31,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-09 07:21:31,402 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:21:31,402 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:21:31,402 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 07:21:31,403 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:21:31,403 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:21:31,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1990592245, now seen corresponding path program 1 times [2024-11-09 07:21:31,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:21:31,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830218043] [2024-11-09 07:21:31,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:21:31,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:21:31,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:21:31,608 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:21:31,608 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:21:31,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830218043] [2024-11-09 07:21:31,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830218043] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:21:31,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377660630] [2024-11-09 07:21:31,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:21:31,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:21:31,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:21:31,611 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:21:31,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 07:21:31,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:21:31,709 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 07:21:31,711 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:21:31,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 07:21:31,795 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:21:31,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 07:21:31,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377660630] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:21:31,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [511205227] [2024-11-09 07:21:31,867 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2024-11-09 07:21:31,867 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:21:31,867 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:21:31,868 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:21:31,868 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:21:32,321 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 69 for LOIs [2024-11-09 07:21:32,334 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2024-11-09 07:21:32,344 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:21:34,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [511205227] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:21:34,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:21:34,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [8, 7, 7] total 37 [2024-11-09 07:21:34,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814459785] [2024-11-09 07:21:34,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:21:34,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-09 07:21:34,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:21:34,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-09 07:21:34,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1209, Unknown=1, NotChecked=0, Total=1332 [2024-11-09 07:21:34,645 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 27 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 20 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:21:38,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:21:39,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:21:39,575 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2024-11-09 07:21:39,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-09 07:21:39,576 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 20 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 37 [2024-11-09 07:21:39,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:21:39,577 INFO L225 Difference]: With dead ends: 63 [2024-11-09 07:21:39,577 INFO L226 Difference]: Without dead ends: 51 [2024-11-09 07:21:39,578 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 79 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=197, Invalid=2058, Unknown=1, NotChecked=0, Total=2256 [2024-11-09 07:21:39,579 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 41 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2024-11-09 07:21:39,579 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 233 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 728 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2024-11-09 07:21:39,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-09 07:21:39,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2024-11-09 07:21:39,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:21:39,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2024-11-09 07:21:39,591 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 37 [2024-11-09 07:21:39,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:21:39,592 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2024-11-09 07:21:39,592 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 20 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:21:39,592 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2024-11-09 07:21:39,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-09 07:21:39,593 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:21:39,593 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:21:39,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 07:21:39,797 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:21:39,797 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:21:39,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:21:39,798 INFO L85 PathProgramCache]: Analyzing trace with hash -314833446, now seen corresponding path program 1 times [2024-11-09 07:21:39,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:21:39,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152048795] [2024-11-09 07:21:39,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:21:39,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:21:39,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:21:39,982 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 07:21:39,983 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:21:39,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152048795] [2024-11-09 07:21:39,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152048795] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:21:39,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840191338] [2024-11-09 07:21:39,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:21:39,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:21:39,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:21:39,985 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:21:39,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 07:21:40,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:21:40,092 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 07:21:40,094 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:21:40,138 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 07:21:40,139 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:21:40,217 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 07:21:40,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840191338] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:21:40,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [617927560] [2024-11-09 07:21:40,220 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2024-11-09 07:21:40,220 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:21:40,220 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:21:40,220 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:21:40,221 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:21:41,081 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 69 for LOIs [2024-11-09 07:21:41,098 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2024-11-09 07:21:41,109 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:21:44,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [617927560] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:21:44,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:21:44,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [7, 6, 6] total 39 [2024-11-09 07:21:44,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466927126] [2024-11-09 07:21:44,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:21:44,667 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-09 07:21:44,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:21:44,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-09 07:21:44,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1357, Unknown=1, NotChecked=0, Total=1482 [2024-11-09 07:21:44,668 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 31 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:21:48,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:21:52,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:21:52,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:21:52,327 INFO L93 Difference]: Finished difference Result 81 states and 106 transitions. [2024-11-09 07:21:52,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-09 07:21:52,328 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 39 [2024-11-09 07:21:52,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:21:52,328 INFO L225 Difference]: With dead ends: 81 [2024-11-09 07:21:52,328 INFO L226 Difference]: Without dead ends: 61 [2024-11-09 07:21:52,329 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=260, Invalid=2819, Unknown=1, NotChecked=0, Total=3080 [2024-11-09 07:21:52,330 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 61 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2024-11-09 07:21:52,331 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 95 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1159 Invalid, 2 Unknown, 0 Unchecked, 5.7s Time] [2024-11-09 07:21:52,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-09 07:21:52,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2024-11-09 07:21:52,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 42 states have (on average 1.2857142857142858) internal successors, (54), 42 states have internal predecessors, (54), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:21:52,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2024-11-09 07:21:52,348 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 39 [2024-11-09 07:21:52,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:21:52,348 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2024-11-09 07:21:52,348 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:21:52,349 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2024-11-09 07:21:52,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-09 07:21:52,349 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:21:52,350 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:21:52,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 07:21:52,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:21:52,550 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:21:52,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:21:52,551 INFO L85 PathProgramCache]: Analyzing trace with hash 2088677857, now seen corresponding path program 1 times [2024-11-09 07:21:52,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:21:52,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675060740] [2024-11-09 07:21:52,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:21:52,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:21:52,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:21:52,820 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 07:21:52,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:21:52,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675060740] [2024-11-09 07:21:52,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675060740] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:21:52,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038315842] [2024-11-09 07:21:52,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:21:52,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:21:52,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:21:52,822 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:21:52,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 07:21:52,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:21:52,938 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 07:21:52,940 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:21:52,989 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 07:21:52,990 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:21:53,057 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 07:21:53,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038315842] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:21:53,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1025079155] [2024-11-09 07:21:53,060 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2024-11-09 07:21:53,061 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:21:53,061 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:21:53,061 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:21:53,062 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:21:57,240 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 69 for LOIs [2024-11-09 07:21:57,255 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2024-11-09 07:21:57,267 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:22:01,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1025079155] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:22:01,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:22:01,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [6, 6, 6] total 41 [2024-11-09 07:22:01,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493260744] [2024-11-09 07:22:01,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:22:01,728 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-09 07:22:01,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:22:01,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-09 07:22:01,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1499, Unknown=1, NotChecked=0, Total=1640 [2024-11-09 07:22:01,730 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 34 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 27 states have internal predecessors, (33), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:22:05,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:22:09,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:22:09,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:22:09,983 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2024-11-09 07:22:09,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-09 07:22:09,984 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 27 states have internal predecessors, (33), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 43 [2024-11-09 07:22:09,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:22:09,985 INFO L225 Difference]: With dead ends: 76 [2024-11-09 07:22:09,985 INFO L226 Difference]: Without dead ends: 65 [2024-11-09 07:22:09,986 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 93 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=276, Invalid=3029, Unknown=1, NotChecked=0, Total=3306 [2024-11-09 07:22:09,987 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 52 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 1031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:22:09,987 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 89 Invalid, 1031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1017 Invalid, 2 Unknown, 0 Unchecked, 6.0s Time] [2024-11-09 07:22:09,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-09 07:22:10,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 53. [2024-11-09 07:22:10,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 45 states have (on average 1.288888888888889) internal successors, (58), 45 states have internal predecessors, (58), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:22:10,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 66 transitions. [2024-11-09 07:22:10,015 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 66 transitions. Word has length 43 [2024-11-09 07:22:10,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:22:10,016 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 66 transitions. [2024-11-09 07:22:10,016 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 27 states have internal predecessors, (33), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:22:10,016 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 66 transitions. [2024-11-09 07:22:10,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-09 07:22:10,017 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:22:10,017 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:22:10,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 07:22:10,219 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:22:10,219 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:22:10,220 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:22:10,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1224248481, now seen corresponding path program 1 times [2024-11-09 07:22:10,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:22:10,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124967078] [2024-11-09 07:22:10,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:22:10,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:22:10,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:22:10,418 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 07:22:10,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:22:10,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124967078] [2024-11-09 07:22:10,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124967078] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:22:10,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329186488] [2024-11-09 07:22:10,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:22:10,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:22:10,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:22:10,421 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:22:10,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 07:22:10,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:22:10,546 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 07:22:10,547 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:22:10,581 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 07:22:10,581 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:22:10,634 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 07:22:10,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329186488] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:22:10,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1656530260] [2024-11-09 07:22:10,636 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2024-11-09 07:22:10,636 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:22:10,637 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:22:10,637 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:22:10,637 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:22:11,524 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 69 for LOIs [2024-11-09 07:22:11,534 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2024-11-09 07:22:11,541 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:22:15,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1656530260] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:22:15,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:22:15,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [7, 6, 6] total 39 [2024-11-09 07:22:15,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151118876] [2024-11-09 07:22:15,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:22:15,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-09 07:22:15,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:22:15,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-09 07:22:15,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1357, Unknown=1, NotChecked=0, Total=1482 [2024-11-09 07:22:15,600 INFO L87 Difference]: Start difference. First operand 53 states and 66 transitions. Second operand has 31 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:22:18,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:22:22,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:22:23,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:22:23,195 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2024-11-09 07:22:23,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-09 07:22:23,196 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 43 [2024-11-09 07:22:23,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:22:23,197 INFO L225 Difference]: With dead ends: 73 [2024-11-09 07:22:23,197 INFO L226 Difference]: Without dead ends: 63 [2024-11-09 07:22:23,198 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 95 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=260, Invalid=2819, Unknown=1, NotChecked=0, Total=3080 [2024-11-09 07:22:23,199 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 54 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 15 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2024-11-09 07:22:23,200 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 73 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 863 Invalid, 2 Unknown, 0 Unchecked, 5.6s Time] [2024-11-09 07:22:23,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-09 07:22:23,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2024-11-09 07:22:23,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 46 states have internal predecessors, (59), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:22:23,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2024-11-09 07:22:23,221 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 43 [2024-11-09 07:22:23,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:22:23,221 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2024-11-09 07:22:23,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:22:23,221 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2024-11-09 07:22:23,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-09 07:22:23,222 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:22:23,222 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:22:23,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 07:22:23,423 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:22:23,423 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:22:23,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:22:23,423 INFO L85 PathProgramCache]: Analyzing trace with hash -626475770, now seen corresponding path program 1 times [2024-11-09 07:22:23,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:22:23,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762574374] [2024-11-09 07:22:23,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:22:23,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:22:23,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:22:23,598 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 07:22:23,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:22:23,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762574374] [2024-11-09 07:22:23,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762574374] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:22:23,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511148579] [2024-11-09 07:22:23,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:22:23,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:22:23,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:22:23,601 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:22:23,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 07:22:23,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:22:23,726 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 07:22:23,730 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:22:23,768 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 07:22:23,768 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:22:23,832 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 07:22:23,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511148579] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:22:23,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [376292028] [2024-11-09 07:22:23,834 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2024-11-09 07:22:23,835 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:22:23,835 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:22:23,835 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:22:23,836 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:22:26,113 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 69 for LOIs [2024-11-09 07:22:26,127 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2024-11-09 07:22:26,134 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:22:30,496 WARN L873 $PredicateComparison]: unable to prove that (or (and (exists ((|v_ULTIMATE.start_upsweep_~space~0#1_48| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_30| Int) (|v_ULTIMATE.start_upsweep_~n#1_37| Int) (|v_ULTIMATE.start_upsweep_~a#1.base_30| Int)) (let ((.cse0 (= |v_ULTIMATE.start_upsweep_~space~0#1_48| 1)) (.cse3 (<= 0 |c_ULTIMATE.start_main_~n~0#1|)) (.cse1 (<= 1 |c_#StackHeapBarrier|)) (.cse2 (<= |c_ULTIMATE.start_main_~n~0#1| 1073741823)) (.cse7 (<= 2 |v_ULTIMATE.start_upsweep_~n#1_37|)) (.cse4 (= |v_ULTIMATE.start_upsweep_~a#1.offset_30| 0)) (.cse5 (= |c_ULTIMATE.start_main_~a0~0#1.offset| 0)) (.cse8 (<= 2 |c_ULTIMATE.start_main_~n~0#1|)) (.cse6 (= |c_ULTIMATE.start_main_~a~0#1.offset| 0)) (.cse9 (<= |v_ULTIMATE.start_upsweep_~n#1_37| 1073741823)) (.cse10 (= (mod |v_ULTIMATE.start_upsweep_~space~0#1_48| 2) 0))) (and (or (and .cse0 .cse1 .cse2 (= |c_ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_upsweep_~n#1_37|) .cse3 .cse4 .cse5 (= |v_ULTIMATE.start_upsweep_~a#1.base_30| |c_ULTIMATE.start_main_~a~0#1.base|) .cse6) (and .cse1 .cse2 .cse7 .cse4 .cse5 .cse8 .cse6 .cse9 .cse10)) (<= |v_ULTIMATE.start_upsweep_~n#1_37| |v_ULTIMATE.start_upsweep_~space~0#1_48|) (<= |v_ULTIMATE.start_upsweep_~space~0#1_48| 2147483647) (<= 0 (+ |v_ULTIMATE.start_upsweep_~space~0#1_48| 2147483648)) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse9 (<= 0 |v_ULTIMATE.start_upsweep_~n#1_37|)) (and .cse1 .cse2 .cse7 .cse4 .cse5 .cse8 .cse6 .cse9)) (let ((.cse11 (div |v_ULTIMATE.start_upsweep_~space~0#1_48| 2)) (.cse12 (+ |v_ULTIMATE.start_upsweep_~space~0#1_48| 1))) (or (and (= |c_ULTIMATE.start_downsweep_~space#1| (+ .cse11 1)) (not .cse10) (<= .cse12 0)) (and (= |c_ULTIMATE.start_downsweep_~space#1| .cse11) (or (< 0 .cse12) .cse10))))))) (= |c_ULTIMATE.start_main_~a~0#1.offset| |c_ULTIMATE.start_downsweep_~a#1.offset|) (exists ((|v_#memory_int_171| (Array Int (Array Int Int)))) (= (store |v_#memory_int_171| |c_ULTIMATE.start_downsweep_~a#1.base| (store (select |v_#memory_int_171| |c_ULTIMATE.start_downsweep_~a#1.base|) (+ (* |c_ULTIMATE.start_downsweep_~n#1| 4) (- 4) |c_ULTIMATE.start_downsweep_~a#1.offset|) 0)) |c_#memory_int|)) (= |c_ULTIMATE.start_downsweep_~a#1.base| |c_ULTIMATE.start_main_~a~0#1.base|) (= |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_downsweep_~n#1|)) (exists ((|v_ULTIMATE.start_downsweep_~space#1_40| Int)) (and (<= 1 |v_ULTIMATE.start_downsweep_~space#1_40|) (= (div |v_ULTIMATE.start_downsweep_~space#1_40| 2) |c_ULTIMATE.start_downsweep_~space#1|)))) is different from true [2024-11-09 07:22:34,910 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4012#(and (= |ULTIMATE.start_check_~sum~0#1| 0) (= |ULTIMATE.start_check_~i~0#1| 0) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_check_~a0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) |ULTIMATE.start_check_~a#1.offset|) 0)) (exists ((|v_ULTIMATE.start_downsweep_~space#1_42| Int)) (and (<= |v_ULTIMATE.start_downsweep_~space#1_42| 0) (exists ((|v_ULTIMATE.start_downsweep_~space#1_40| Int)) (and (<= 1 |v_ULTIMATE.start_downsweep_~space#1_40|) (= (div |v_ULTIMATE.start_downsweep_~space#1_40| 2) |v_ULTIMATE.start_downsweep_~space#1_42|))))) (<= 1 |ULTIMATE.start_check_~n#1|))' at error location [2024-11-09 07:22:34,910 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:22:34,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:22:34,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2024-11-09 07:22:34,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170236032] [2024-11-09 07:22:34,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:22:34,911 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 07:22:34,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:22:34,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 07:22:34,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1433, Unknown=5, NotChecked=76, Total=1640 [2024-11-09 07:22:34,913 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:22:35,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:22:35,041 INFO L93 Difference]: Finished difference Result 87 states and 111 transitions. [2024-11-09 07:22:35,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 07:22:35,042 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 45 [2024-11-09 07:22:35,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:22:35,042 INFO L225 Difference]: With dead ends: 87 [2024-11-09 07:22:35,042 INFO L226 Difference]: Without dead ends: 56 [2024-11-09 07:22:35,043 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 98 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=126, Invalid=1433, Unknown=5, NotChecked=76, Total=1640 [2024-11-09 07:22:35,044 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 1 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:22:35,044 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 208 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:22:35,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-09 07:22:35,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2024-11-09 07:22:35,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 48 states have internal predecessors, (61), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:22:35,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2024-11-09 07:22:35,074 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 45 [2024-11-09 07:22:35,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:22:35,075 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2024-11-09 07:22:35,075 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:22:35,075 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2024-11-09 07:22:35,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-09 07:22:35,077 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:22:35,077 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:22:35,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-09 07:22:35,281 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 07:22:35,281 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:22:35,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:22:35,282 INFO L85 PathProgramCache]: Analyzing trace with hash -373620501, now seen corresponding path program 2 times [2024-11-09 07:22:35,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:22:35,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115158534] [2024-11-09 07:22:35,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:22:35,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:22:35,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:22:36,450 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 07:22:36,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:22:36,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115158534] [2024-11-09 07:22:36,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115158534] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:22:36,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713443682] [2024-11-09 07:22:36,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:22:36,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:22:36,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:22:36,454 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:22:36,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 07:22:36,620 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 07:22:36,621 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:22:36,624 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-09 07:22:36,629 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:22:37,087 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 16 treesize of output 12 [2024-11-09 07:22:37,420 INFO L349 Elim1Store]: treesize reduction 68, result has 4.2 percent of original size [2024-11-09 07:22:37,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 14 [2024-11-09 07:22:37,629 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 07:22:37,629 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:22:38,113 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 48 treesize of output 44 [2024-11-09 07:22:38,129 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:22:38,130 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 80 treesize of output 64 [2024-11-09 07:22:38,491 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 07:22:38,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713443682] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:22:38,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1775377183] [2024-11-09 07:22:38,493 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2024-11-09 07:22:38,494 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:22:38,494 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:22:38,494 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:22:38,494 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:22:40,408 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 69 for LOIs [2024-11-09 07:22:40,421 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2024-11-09 07:22:40,432 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:22:46,516 WARN L873 $PredicateComparison]: unable to prove that (or (and (exists ((|v_#memory_int_203| (Array Int (Array Int Int)))) (= (store |v_#memory_int_203| |c_ULTIMATE.start_downsweep_~a#1.base| (store (select |v_#memory_int_203| |c_ULTIMATE.start_downsweep_~a#1.base|) (+ (* |c_ULTIMATE.start_downsweep_~n#1| 4) (- 4) |c_ULTIMATE.start_downsweep_~a#1.offset|) 0)) |c_#memory_int|)) (= |c_ULTIMATE.start_main_~a~0#1.offset| |c_ULTIMATE.start_downsweep_~a#1.offset|) (exists ((|v_ULTIMATE.start_upsweep_~space~0#1_56| Int) (|v_ULTIMATE.start_upsweep_~a#1.base_33| Int) (|v_ULTIMATE.start_upsweep_~n#1_41| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_33| Int)) (let ((.cse0 (= |v_ULTIMATE.start_upsweep_~space~0#1_56| 1)) (.cse3 (<= 0 |c_ULTIMATE.start_main_~n~0#1|)) (.cse1 (<= 1 |c_#StackHeapBarrier|)) (.cse7 (<= 2 |v_ULTIMATE.start_upsweep_~n#1_41|)) (.cse8 (<= |v_ULTIMATE.start_upsweep_~n#1_41| 1073741823)) (.cse2 (<= |c_ULTIMATE.start_main_~n~0#1| 1073741823)) (.cse4 (= |v_ULTIMATE.start_upsweep_~a#1.offset_33| 0)) (.cse5 (= |c_ULTIMATE.start_main_~a0~0#1.offset| 0)) (.cse10 (<= 2 |c_ULTIMATE.start_main_~n~0#1|)) (.cse6 (= |c_ULTIMATE.start_main_~a~0#1.offset| 0)) (.cse9 (= (mod |v_ULTIMATE.start_upsweep_~space~0#1_56| 2) 0))) (and (or (and (= |c_ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_upsweep_~n#1_41|) .cse0 .cse1 .cse2 (= |v_ULTIMATE.start_upsweep_~a#1.base_33| |c_ULTIMATE.start_main_~a~0#1.base|) .cse3 .cse4 .cse5 .cse6) (and .cse1 .cse7 .cse8 .cse2 .cse9 (<= (+ (div (* (- 1) |v_ULTIMATE.start_upsweep_~space~0#1_56|) 2) 1) 0) .cse4 .cse5 .cse10 .cse6)) (or (and (<= 0 |v_ULTIMATE.start_upsweep_~n#1_41|) .cse0 .cse1 .cse8 .cse2 .cse3 .cse4 .cse5 .cse6) (and .cse1 .cse7 .cse8 .cse2 .cse4 .cse5 .cse10 .cse6)) (let ((.cse12 (+ |v_ULTIMATE.start_upsweep_~space~0#1_56| 1)) (.cse11 (div |v_ULTIMATE.start_upsweep_~space~0#1_56| 2))) (or (and (= |c_ULTIMATE.start_downsweep_~space#1| .cse11) (or .cse9 (< 0 .cse12))) (and (<= .cse12 0) (not .cse9) (= |c_ULTIMATE.start_downsweep_~space#1| (+ .cse11 1))))) (<= 0 (+ |v_ULTIMATE.start_upsweep_~space~0#1_56| 2147483648)) (<= |v_ULTIMATE.start_upsweep_~space~0#1_56| 2147483647) (<= |v_ULTIMATE.start_upsweep_~n#1_41| |v_ULTIMATE.start_upsweep_~space~0#1_56|)))) (= |c_ULTIMATE.start_downsweep_~a#1.base| |c_ULTIMATE.start_main_~a~0#1.base|) (= |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_downsweep_~n#1|)) (exists ((|v_ULTIMATE.start_downsweep_~space#1_46| Int)) (and (= |c_ULTIMATE.start_downsweep_~space#1| (div |v_ULTIMATE.start_downsweep_~space#1_46| 2)) (<= 1 |v_ULTIMATE.start_downsweep_~space#1_46|)))) is different from true [2024-11-09 07:22:50,861 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4568#(and (exists ((|v_ULTIMATE.start_downsweep_~space#1_48| Int)) (and (exists ((|v_ULTIMATE.start_downsweep_~space#1_46| Int)) (and (<= 1 |v_ULTIMATE.start_downsweep_~space#1_46|) (= (div |v_ULTIMATE.start_downsweep_~space#1_46| 2) |v_ULTIMATE.start_downsweep_~space#1_48|))) (<= |v_ULTIMATE.start_downsweep_~space#1_48| 0))) (= |ULTIMATE.start_check_~sum~0#1| 0) (= |ULTIMATE.start_check_~i~0#1| 0) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_check_~a0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) |ULTIMATE.start_check_~a#1.offset|) 0)) (<= 1 |ULTIMATE.start_check_~n#1|))' at error location [2024-11-09 07:22:50,861 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:22:50,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:22:50,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 13] total 42 [2024-11-09 07:22:50,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341031962] [2024-11-09 07:22:50,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:22:50,863 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-09 07:22:50,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:22:50,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-09 07:22:50,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=5061, Unknown=5, NotChecked=144, Total=5550 [2024-11-09 07:22:50,866 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 42 states, 41 states have (on average 2.317073170731707) internal successors, (95), 42 states have internal predecessors, (95), 4 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-09 07:22:54,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:22:54,618 INFO L93 Difference]: Finished difference Result 176 states and 243 transitions. [2024-11-09 07:22:54,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-09 07:22:54,619 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.317073170731707) internal successors, (95), 42 states have internal predecessors, (95), 4 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 47 [2024-11-09 07:22:54,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:22:54,620 INFO L225 Difference]: With dead ends: 176 [2024-11-09 07:22:54,620 INFO L226 Difference]: Without dead ends: 155 [2024-11-09 07:22:54,624 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3750 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=934, Invalid=10837, Unknown=5, NotChecked=214, Total=11990 [2024-11-09 07:22:54,624 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 395 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:22:54,625 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 381 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1076 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-09 07:22:54,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-11-09 07:22:54,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 97. [2024-11-09 07:22:54,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 89 states have (on average 1.348314606741573) internal successors, (120), 89 states have internal predecessors, (120), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:22:54,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 128 transitions. [2024-11-09 07:22:54,666 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 128 transitions. Word has length 47 [2024-11-09 07:22:54,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:22:54,667 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 128 transitions. [2024-11-09 07:22:54,667 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.317073170731707) internal successors, (95), 42 states have internal predecessors, (95), 4 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-09 07:22:54,667 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 128 transitions. [2024-11-09 07:22:54,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-09 07:22:54,669 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:22:54,669 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:22:54,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-09 07:22:54,869 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-09 07:22:54,870 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:22:54,870 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:22:54,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1928903629, now seen corresponding path program 1 times [2024-11-09 07:22:54,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:22:54,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587996981] [2024-11-09 07:22:54,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:22:54,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:22:54,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:22:55,111 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 07:22:55,112 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:22:55,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587996981] [2024-11-09 07:22:55,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587996981] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:22:55,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84614442] [2024-11-09 07:22:55,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:22:55,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:22:55,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:22:55,115 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:22:55,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 07:22:55,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:22:55,266 INFO L255 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 07:22:55,269 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:22:55,419 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 07:22:55,420 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:22:55,618 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 07:22:55,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84614442] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:22:55,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [408480315] [2024-11-09 07:22:55,621 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2024-11-09 07:22:55,621 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:22:55,622 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:22:55,622 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:22:55,622 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:23:00,503 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 69 for LOIs [2024-11-09 07:23:00,518 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2024-11-09 07:23:00,529 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:23:03,986 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5362#(and (<= (+ |ULTIMATE.start_check_~i~0#1| 1) |ULTIMATE.start_check_~n#1|) (<= 0 |ULTIMATE.start_check_~i~0#1|) (not (= |ULTIMATE.start_check_~sum~0#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4))))))' at error location [2024-11-09 07:23:03,986 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:23:03,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:23:03,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 14 [2024-11-09 07:23:03,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718863652] [2024-11-09 07:23:03,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:23:03,987 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 07:23:03,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:23:03,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 07:23:03,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1830, Unknown=1, NotChecked=0, Total=1980 [2024-11-09 07:23:03,988 INFO L87 Difference]: Start difference. First operand 97 states and 128 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:23:04,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:23:04,415 INFO L93 Difference]: Finished difference Result 116 states and 153 transitions. [2024-11-09 07:23:04,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 07:23:04,415 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2024-11-09 07:23:04,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:23:04,417 INFO L225 Difference]: With dead ends: 116 [2024-11-09 07:23:04,417 INFO L226 Difference]: Without dead ends: 105 [2024-11-09 07:23:04,418 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 104 SyntacticMatches, 7 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=202, Invalid=2347, Unknown=1, NotChecked=0, Total=2550 [2024-11-09 07:23:04,418 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 34 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:23:04,419 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 245 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 07:23:04,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-11-09 07:23:04,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 90. [2024-11-09 07:23:04,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 82 states have (on average 1.2926829268292683) internal successors, (106), 82 states have internal predecessors, (106), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:23:04,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 114 transitions. [2024-11-09 07:23:04,458 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 114 transitions. Word has length 49 [2024-11-09 07:23:04,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:23:04,458 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 114 transitions. [2024-11-09 07:23:04,459 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:23:04,459 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 114 transitions. [2024-11-09 07:23:04,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-09 07:23:04,460 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:23:04,460 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:23:04,483 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-09 07:23:04,664 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:23:04,664 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:23:04,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:23:04,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1468950734, now seen corresponding path program 1 times [2024-11-09 07:23:04,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:23:04,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034433085] [2024-11-09 07:23:04,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:23:04,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:23:04,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:23:07,992 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 07:23:07,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:23:07,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034433085] [2024-11-09 07:23:07,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034433085] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:23:07,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294096202] [2024-11-09 07:23:07,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:23:07,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:23:07,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:23:07,994 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:23:07,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 07:23:08,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:23:08,131 INFO L255 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 92 conjuncts are in the unsatisfiable core [2024-11-09 07:23:08,136 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:23:08,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-11-09 07:23:08,213 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 7 treesize of output 6 [2024-11-09 07:23:08,331 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2024-11-09 07:23:08,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2024-11-09 07:23:08,432 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 15 treesize of output 10 [2024-11-09 07:23:08,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 22 treesize of output 20 [2024-11-09 07:23:08,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 10 [2024-11-09 07:23:08,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 36 treesize of output 34 [2024-11-09 07:23:08,684 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 25 treesize of output 14 [2024-11-09 07:23:09,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 42 treesize of output 40 [2024-11-09 07:23:09,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2024-11-09 07:23:11,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 90 treesize of output 80 [2024-11-09 07:23:14,681 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 0 case distinctions, treesize of input 114 treesize of output 94 [2024-11-09 07:23:14,689 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 37 treesize of output 31 [2024-11-09 07:23:14,786 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 07:23:14,786 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:25:36,090 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_upsweep_~a#1.offset_38| Int) (v_ArrVal_312 Int) (v_ArrVal_317 (Array Int Int)) (|ULTIMATE.start_main_~a~0#1.offset| Int) (|v_ULTIMATE.start_upsweep_~left~0#1_97| Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (v_ArrVal_309 Int) (v_ArrVal_308 Int)) (or (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| (store (store v_ArrVal_317 |ULTIMATE.start_main_~a0~0#1.offset| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| v_ArrVal_317) |c_ULTIMATE.start_main_~a~0#1.base|) |ULTIMATE.start_main_~a~0#1.offset|)) (+ |ULTIMATE.start_main_~a0~0#1.offset| 4) v_ArrVal_308)))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse2 (select .cse1 |ULTIMATE.start_main_~a~0#1.offset|))) (= (select (select (store .cse0 |c_ULTIMATE.start_main_~a~0#1.base| (store (store (store .cse1 (+ |v_ULTIMATE.start_upsweep_~a#1.offset_38| (* |v_ULTIMATE.start_upsweep_~left~0#1_97| 4) 4) v_ArrVal_309) (+ |ULTIMATE.start_main_~a~0#1.offset| 4) .cse2) |ULTIMATE.start_main_~a~0#1.offset| v_ArrVal_312)) |c_ULTIMATE.start_main_#t~malloc16#1.base|) |ULTIMATE.start_main_~a0~0#1.offset|) .cse2)))) (< |v_ULTIMATE.start_upsweep_~a#1.offset_38| |ULTIMATE.start_main_~a~0#1.offset|) (< |v_ULTIMATE.start_upsweep_~left~0#1_97| 0))) is different from false [2024-11-09 07:25:36,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294096202] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:25:36,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [46302936] [2024-11-09 07:25:36,095 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2024-11-09 07:25:36,095 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:25:36,095 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:25:36,095 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:25:36,096 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:25:38,278 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 69 for LOIs [2024-11-09 07:25:38,289 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2024-11-09 07:25:38,300 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:25:45,930 WARN L873 $PredicateComparison]: unable to prove that (or (and (exists ((|v_#memory_int_265| (Array Int (Array Int Int)))) (= (store |v_#memory_int_265| |c_ULTIMATE.start_downsweep_~a#1.base| (store (select |v_#memory_int_265| |c_ULTIMATE.start_downsweep_~a#1.base|) (+ (* |c_ULTIMATE.start_downsweep_~n#1| 4) (- 4) |c_ULTIMATE.start_downsweep_~a#1.offset|) 0)) |c_#memory_int|)) (exists ((|v_ULTIMATE.start_upsweep_~a#1.base_39| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_39| Int) (|v_ULTIMATE.start_upsweep_~space~0#1_70| Int) (|v_ULTIMATE.start_upsweep_~n#1_47| Int)) (let ((.cse5 (= (mod |v_ULTIMATE.start_upsweep_~space~0#1_70| 2) 0)) (.cse9 (= |v_ULTIMATE.start_upsweep_~space~0#1_70| 1)) (.cse10 (<= 0 |c_ULTIMATE.start_main_~n~0#1|)) (.cse0 (= |v_ULTIMATE.start_upsweep_~a#1.offset_39| 0)) (.cse1 (<= 2 |v_ULTIMATE.start_upsweep_~n#1_47|)) (.cse2 (<= |v_ULTIMATE.start_upsweep_~n#1_47| 1073741823)) (.cse3 (<= 1 |c_#StackHeapBarrier|)) (.cse4 (<= |c_ULTIMATE.start_main_~n~0#1| 1073741823)) (.cse6 (= |c_ULTIMATE.start_main_~a0~0#1.offset| 0)) (.cse7 (<= 2 |c_ULTIMATE.start_main_~n~0#1|)) (.cse8 (= |c_ULTIMATE.start_main_~a~0#1.offset| 0))) (and (<= |v_ULTIMATE.start_upsweep_~space~0#1_70| 2147483647) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 (<= (+ (div (* (- 1) |v_ULTIMATE.start_upsweep_~space~0#1_70|) 2) 1) 0) .cse6 .cse7 .cse8) (and (= |c_ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_upsweep_~n#1_47|) .cse0 .cse9 .cse3 .cse4 .cse10 .cse6 .cse8 (= |v_ULTIMATE.start_upsweep_~a#1.base_39| |c_ULTIMATE.start_main_~a~0#1.base|))) (<= |v_ULTIMATE.start_upsweep_~n#1_47| |v_ULTIMATE.start_upsweep_~space~0#1_70|) (let ((.cse11 (+ |v_ULTIMATE.start_upsweep_~space~0#1_70| 1)) (.cse12 (div |v_ULTIMATE.start_upsweep_~space~0#1_70| 2))) (or (and (or (< 0 .cse11) .cse5) (= |c_ULTIMATE.start_downsweep_~space#1| .cse12)) (and (not .cse5) (<= .cse11 0) (= |c_ULTIMATE.start_downsweep_~space#1| (+ .cse12 1))))) (or (and .cse0 .cse9 .cse2 .cse3 .cse4 (<= 0 |v_ULTIMATE.start_upsweep_~n#1_47|) .cse10 .cse6 .cse8) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse6 .cse7 .cse8)) (<= 0 (+ |v_ULTIMATE.start_upsweep_~space~0#1_70| 2147483648))))) (= |c_ULTIMATE.start_main_~a~0#1.offset| |c_ULTIMATE.start_downsweep_~a#1.offset|) (= |c_ULTIMATE.start_downsweep_~a#1.base| |c_ULTIMATE.start_main_~a~0#1.base|) (= |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_downsweep_~n#1|)) (exists ((|v_ULTIMATE.start_downsweep_~space#1_59| Int)) (and (= |c_ULTIMATE.start_downsweep_~space#1| (div |v_ULTIMATE.start_downsweep_~space#1_59| 2)) (<= 1 |v_ULTIMATE.start_downsweep_~space#1_59|)))) is different from true [2024-11-09 07:25:53,385 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6014#(and (<= (+ |ULTIMATE.start_check_~i~0#1| 1) |ULTIMATE.start_check_~n#1|) (<= 0 |ULTIMATE.start_check_~i~0#1|) (not (= |ULTIMATE.start_check_~sum~0#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4))))))' at error location [2024-11-09 07:25:53,385 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:25:53,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 07:25:53,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 46 [2024-11-09 07:25:53,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35728884] [2024-11-09 07:25:53,386 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 07:25:53,386 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-09 07:25:53,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:25:53,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-09 07:25:53,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=8495, Unknown=47, NotChecked=374, Total=9312 [2024-11-09 07:25:53,390 INFO L87 Difference]: Start difference. First operand 90 states and 114 transitions. Second operand has 46 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 41 states have internal predecessors, (76), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-09 07:26:09,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:26:09,561 INFO L93 Difference]: Finished difference Result 141 states and 180 transitions. [2024-11-09 07:26:09,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-09 07:26:09,562 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 41 states have internal predecessors, (76), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 51 [2024-11-09 07:26:09,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:26:09,563 INFO L225 Difference]: With dead ends: 141 [2024-11-09 07:26:09,563 INFO L226 Difference]: Without dead ends: 126 [2024-11-09 07:26:09,565 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 4014 ImplicationChecksByTransitivity, 177.1s TimeCoverageRelationStatistics Valid=704, Invalid=12824, Unknown=52, NotChecked=462, Total=14042 [2024-11-09 07:26:09,565 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 159 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 1298 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 1331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-09 07:26:09,566 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 324 Invalid, 1331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1298 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-09 07:26:09,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-11-09 07:26:09,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 97. [2024-11-09 07:26:09,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 89 states have (on average 1.2808988764044944) internal successors, (114), 89 states have internal predecessors, (114), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:26:09,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 122 transitions. [2024-11-09 07:26:09,597 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 122 transitions. Word has length 51 [2024-11-09 07:26:09,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:26:09,598 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 122 transitions. [2024-11-09 07:26:09,598 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 41 states have internal predecessors, (76), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-09 07:26:09,598 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 122 transitions. [2024-11-09 07:26:09,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-09 07:26:09,598 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:26:09,598 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:26:09,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-09 07:26:09,799 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:26:09,799 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:26:09,799 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:26:09,800 INFO L85 PathProgramCache]: Analyzing trace with hash -589219083, now seen corresponding path program 3 times [2024-11-09 07:26:09,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:26:09,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463867655] [2024-11-09 07:26:09,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:26:09,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:26:09,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:26:10,070 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 07:26:10,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:26:10,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463867655] [2024-11-09 07:26:10,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463867655] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:26:10,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011580892] [2024-11-09 07:26:10,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 07:26:10,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:26:10,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:26:10,073 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:26:10,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 07:26:10,241 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 07:26:10,241 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:26:10,242 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 07:26:10,245 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:26:10,385 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 07:26:10,386 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:26:10,560 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 07:26:10,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011580892] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:26:10,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1343071147] [2024-11-09 07:26:10,564 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2024-11-09 07:26:10,564 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:26:10,565 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:26:10,565 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:26:10,566 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:26:12,544 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 69 for LOIs [2024-11-09 07:26:12,553 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2024-11-09 07:26:12,560 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:26:17,738 WARN L873 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_downsweep_~space#1_65| Int)) (and (= |c_ULTIMATE.start_downsweep_~space#1| (div |v_ULTIMATE.start_downsweep_~space#1_65| 2)) (<= 1 |v_ULTIMATE.start_downsweep_~space#1_65|))) (and (= |c_ULTIMATE.start_main_~a~0#1.offset| |c_ULTIMATE.start_downsweep_~a#1.offset|) (exists ((|v_ULTIMATE.start_upsweep_~n#1_50| Int) (|v_ULTIMATE.start_upsweep_~space~0#1_76| Int) (|v_ULTIMATE.start_upsweep_~a#1.base_42| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_42| Int)) (let ((.cse4 (= (mod |v_ULTIMATE.start_upsweep_~space~0#1_76| 2) 0)) (.cse2 (div |v_ULTIMATE.start_upsweep_~space~0#1_76| 2)) (.cse1 (<= 2 |v_ULTIMATE.start_upsweep_~n#1_50|)) (.cse8 (<= 2 |c_ULTIMATE.start_main_~n~0#1|)) (.cse0 (<= |v_ULTIMATE.start_upsweep_~n#1_50| 1073741823)) (.cse3 (= |v_ULTIMATE.start_upsweep_~a#1.offset_42| 0)) (.cse5 (<= 1 |c_#StackHeapBarrier|)) (.cse6 (<= |c_ULTIMATE.start_main_~n~0#1| 1073741823)) (.cse10 (= |v_ULTIMATE.start_upsweep_~space~0#1_76| 1)) (.cse11 (<= 0 |c_ULTIMATE.start_main_~n~0#1|)) (.cse7 (= |c_ULTIMATE.start_main_~a0~0#1.offset| 0)) (.cse9 (= |c_ULTIMATE.start_main_~a~0#1.offset| 0))) (and (or (and .cse0 .cse1 (<= 1 .cse2) .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9) (and .cse3 (= |c_ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_upsweep_~n#1_50|) .cse5 .cse6 .cse10 .cse11 .cse7 (= |v_ULTIMATE.start_upsweep_~a#1.base_42| |c_ULTIMATE.start_main_~a~0#1.base|) .cse9)) (let ((.cse12 (+ |v_ULTIMATE.start_upsweep_~space~0#1_76| 1))) (or (and (not .cse4) (<= .cse12 0) (= |c_ULTIMATE.start_downsweep_~space#1| (+ .cse2 1))) (and (or .cse4 (< 0 .cse12)) (= |c_ULTIMATE.start_downsweep_~space#1| .cse2)))) (<= |v_ULTIMATE.start_upsweep_~space~0#1_76| 2147483647) (<= |v_ULTIMATE.start_upsweep_~n#1_50| |v_ULTIMATE.start_upsweep_~space~0#1_76|) (<= 0 (+ |v_ULTIMATE.start_upsweep_~space~0#1_76| 2147483648)) (or (and .cse0 .cse1 .cse3 .cse5 .cse6 .cse7 .cse8 .cse9) (and .cse0 .cse3 .cse5 .cse6 .cse10 .cse11 .cse7 (<= 0 |v_ULTIMATE.start_upsweep_~n#1_50|) .cse9))))) (= |c_ULTIMATE.start_downsweep_~a#1.base| |c_ULTIMATE.start_main_~a~0#1.base|) (exists ((|v_#memory_int_300| (Array Int (Array Int Int)))) (= (store |v_#memory_int_300| |c_ULTIMATE.start_downsweep_~a#1.base| (store (select |v_#memory_int_300| |c_ULTIMATE.start_downsweep_~a#1.base|) (+ (* |c_ULTIMATE.start_downsweep_~n#1| 4) (- 4) |c_ULTIMATE.start_downsweep_~a#1.offset|) 0)) |c_#memory_int|)) (= |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_downsweep_~n#1|))) is different from true [2024-11-09 07:26:22,010 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6754#(and (= |ULTIMATE.start_check_~sum~0#1| 0) (= |ULTIMATE.start_check_~i~0#1| 0) (exists ((|v_ULTIMATE.start_downsweep_~space#1_67| Int)) (and (<= |v_ULTIMATE.start_downsweep_~space#1_67| 0) (exists ((|v_ULTIMATE.start_downsweep_~space#1_65| Int)) (and (<= 1 |v_ULTIMATE.start_downsweep_~space#1_65|) (= (div |v_ULTIMATE.start_downsweep_~space#1_65| 2) |v_ULTIMATE.start_downsweep_~space#1_67|))))) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_check_~a0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) |ULTIMATE.start_check_~a#1.offset|) 0)) (<= 1 |ULTIMATE.start_check_~n#1|))' at error location [2024-11-09 07:26:22,010 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:26:22,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:26:22,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-11-09 07:26:22,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502356047] [2024-11-09 07:26:22,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:26:22,011 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-09 07:26:22,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:26:22,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-09 07:26:22,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2096, Unknown=5, NotChecked=92, Total=2352 [2024-11-09 07:26:22,013 INFO L87 Difference]: Start difference. First operand 97 states and 122 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:26:22,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:26:22,604 INFO L93 Difference]: Finished difference Result 203 states and 262 transitions. [2024-11-09 07:26:22,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 07:26:22,605 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2024-11-09 07:26:22,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:26:22,606 INFO L225 Difference]: With dead ends: 203 [2024-11-09 07:26:22,606 INFO L226 Difference]: Without dead ends: 145 [2024-11-09 07:26:22,606 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 109 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=213, Invalid=2648, Unknown=5, NotChecked=104, Total=2970 [2024-11-09 07:26:22,607 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 53 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 07:26:22,607 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 432 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 07:26:22,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-11-09 07:26:22,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 104. [2024-11-09 07:26:22,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 96 states have (on average 1.2604166666666667) internal successors, (121), 96 states have internal predecessors, (121), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:26:22,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 129 transitions. [2024-11-09 07:26:22,652 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 129 transitions. Word has length 51 [2024-11-09 07:26:22,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:26:22,653 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 129 transitions. [2024-11-09 07:26:22,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:26:22,653 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 129 transitions. [2024-11-09 07:26:22,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-09 07:26:22,654 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:26:22,654 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:26:22,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-09 07:26:22,858 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:26:22,858 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:26:22,859 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:26:22,859 INFO L85 PathProgramCache]: Analyzing trace with hash 930522778, now seen corresponding path program 4 times [2024-11-09 07:26:22,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:26:22,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015736162] [2024-11-09 07:26:22,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:26:22,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:26:22,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:26:23,149 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-09 07:26:23,150 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:26:23,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015736162] [2024-11-09 07:26:23,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015736162] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:26:23,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259516571] [2024-11-09 07:26:23,150 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 07:26:23,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:26:23,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:26:23,153 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:26:23,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 07:26:23,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:26:23,333 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 07:26:23,335 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:26:23,464 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-09 07:26:23,464 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:26:23,576 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-09 07:26:23,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259516571] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:26:23,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2123063459] [2024-11-09 07:26:23,578 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2024-11-09 07:26:23,579 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:26:23,579 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:26:23,579 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:26:23,579 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:26:25,099 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 69 for LOIs [2024-11-09 07:26:25,108 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2024-11-09 07:26:25,115 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:26:30,092 WARN L873 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_downsweep_~space#1_71| Int)) (and (<= 1 |v_ULTIMATE.start_downsweep_~space#1_71|) (= |c_ULTIMATE.start_downsweep_~space#1| (div |v_ULTIMATE.start_downsweep_~space#1_71| 2)))) (and (exists ((|v_ULTIMATE.start_upsweep_~a#1.base_45| Int) (|v_ULTIMATE.start_upsweep_~space~0#1_83| Int) (|v_ULTIMATE.start_upsweep_~n#1_54| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_45| Int)) (let ((.cse6 (<= 0 |c_ULTIMATE.start_main_~n~0#1|)) (.cse8 (= |v_ULTIMATE.start_upsweep_~space~0#1_83| 1)) (.cse11 (<= 2 |v_ULTIMATE.start_upsweep_~n#1_54|)) (.cse0 (= (mod |v_ULTIMATE.start_upsweep_~space~0#1_83| 2) 0)) (.cse3 (<= |v_ULTIMATE.start_upsweep_~n#1_54| 1073741823)) (.cse4 (<= 1 |c_#StackHeapBarrier|)) (.cse5 (<= |c_ULTIMATE.start_main_~n~0#1| 1073741823)) (.cse7 (= |v_ULTIMATE.start_upsweep_~a#1.offset_45| 0)) (.cse9 (= |c_ULTIMATE.start_main_~a0~0#1.offset| 0)) (.cse12 (<= 2 |c_ULTIMATE.start_main_~n~0#1|)) (.cse10 (= |c_ULTIMATE.start_main_~a~0#1.offset| 0))) (and (<= 0 (+ |v_ULTIMATE.start_upsweep_~space~0#1_83| 2147483648)) (let ((.cse1 (div |v_ULTIMATE.start_upsweep_~space~0#1_83| 2)) (.cse2 (+ |v_ULTIMATE.start_upsweep_~space~0#1_83| 1))) (or (and (not .cse0) (= |c_ULTIMATE.start_downsweep_~space#1| (+ .cse1 1)) (<= .cse2 0)) (and (= |c_ULTIMATE.start_downsweep_~space#1| .cse1) (or (< 0 .cse2) .cse0)))) (<= |v_ULTIMATE.start_upsweep_~n#1_54| |v_ULTIMATE.start_upsweep_~space~0#1_83|) (or (and (<= 0 |v_ULTIMATE.start_upsweep_~n#1_54|) .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10) (and .cse11 .cse3 .cse4 .cse5 .cse7 .cse9 .cse12 .cse10)) (or (and (= |c_ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_upsweep_~n#1_54|) .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 (= |v_ULTIMATE.start_upsweep_~a#1.base_45| |c_ULTIMATE.start_main_~a~0#1.base|)) (and .cse11 .cse0 .cse3 (<= (+ (div (* (- 1) |v_ULTIMATE.start_upsweep_~space~0#1_83|) 2) 1) 0) .cse4 .cse5 .cse7 .cse9 .cse12 .cse10)) (<= |v_ULTIMATE.start_upsweep_~space~0#1_83| 2147483647)))) (exists ((|v_#memory_int_336| (Array Int (Array Int Int)))) (= (store |v_#memory_int_336| |c_ULTIMATE.start_downsweep_~a#1.base| (store (select |v_#memory_int_336| |c_ULTIMATE.start_downsweep_~a#1.base|) (+ (* |c_ULTIMATE.start_downsweep_~n#1| 4) (- 4) |c_ULTIMATE.start_downsweep_~a#1.offset|) 0)) |c_#memory_int|)) (= |c_ULTIMATE.start_main_~a~0#1.offset| |c_ULTIMATE.start_downsweep_~a#1.offset|) (= |c_ULTIMATE.start_downsweep_~a#1.base| |c_ULTIMATE.start_main_~a~0#1.base|) (= |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_downsweep_~n#1|))) is different from true [2024-11-09 07:26:34,426 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7568#(and (= |ULTIMATE.start_check_~sum~0#1| 0) (= |ULTIMATE.start_check_~i~0#1| 0) (exists ((|v_ULTIMATE.start_downsweep_~space#1_73| Int)) (and (exists ((|v_ULTIMATE.start_downsweep_~space#1_71| Int)) (and (<= 1 |v_ULTIMATE.start_downsweep_~space#1_71|) (= (div |v_ULTIMATE.start_downsweep_~space#1_71| 2) |v_ULTIMATE.start_downsweep_~space#1_73|))) (<= |v_ULTIMATE.start_downsweep_~space#1_73| 0))) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_check_~a0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) |ULTIMATE.start_check_~a#1.offset|) 0)) (<= 1 |ULTIMATE.start_check_~n#1|))' at error location [2024-11-09 07:26:34,427 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:26:34,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:26:34,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 13 [2024-11-09 07:26:34,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543835396] [2024-11-09 07:26:34,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:26:34,428 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 07:26:34,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:26:34,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 07:26:34,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1831, Unknown=5, NotChecked=86, Total=2070 [2024-11-09 07:26:34,429 INFO L87 Difference]: Start difference. First operand 104 states and 129 transitions. Second operand has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:26:34,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:26:34,801 INFO L93 Difference]: Finished difference Result 185 states and 235 transitions. [2024-11-09 07:26:34,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 07:26:34,802 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 53 [2024-11-09 07:26:34,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:26:34,803 INFO L225 Difference]: With dead ends: 185 [2024-11-09 07:26:34,803 INFO L226 Difference]: Without dead ends: 144 [2024-11-09 07:26:34,803 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 117 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=174, Invalid=2177, Unknown=5, NotChecked=94, Total=2450 [2024-11-09 07:26:34,804 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 40 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:26:34,804 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 211 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 07:26:34,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-11-09 07:26:34,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 109. [2024-11-09 07:26:34,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 101 states have (on average 1.2475247524752475) internal successors, (126), 101 states have internal predecessors, (126), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:26:34,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 134 transitions. [2024-11-09 07:26:34,836 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 134 transitions. Word has length 53 [2024-11-09 07:26:34,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:26:34,836 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 134 transitions. [2024-11-09 07:26:34,836 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:26:34,837 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 134 transitions. [2024-11-09 07:26:34,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-09 07:26:34,837 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:26:34,838 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:26:34,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-09 07:26:35,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:26:35,038 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:26:35,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:26:35,039 INFO L85 PathProgramCache]: Analyzing trace with hash 741048444, now seen corresponding path program 5 times [2024-11-09 07:26:35,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:26:35,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762973381] [2024-11-09 07:26:35,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:26:35,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:26:35,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:26:35,263 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 07:26:35,263 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:26:35,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762973381] [2024-11-09 07:26:35,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762973381] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:26:35,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777703497] [2024-11-09 07:26:35,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:26:35,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:26:35,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:26:35,266 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:26:35,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 07:26:35,437 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 07:26:35,438 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:26:35,439 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 07:26:35,441 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:26:35,543 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 07:26:35,544 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:26:35,679 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 07:26:35,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777703497] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:26:35,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [788260120] [2024-11-09 07:26:35,682 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2024-11-09 07:26:35,682 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:26:35,682 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:26:35,683 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:26:35,683 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:26:37,155 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 69 for LOIs [2024-11-09 07:26:37,163 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2024-11-09 07:26:37,170 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:26:41,712 WARN L873 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_downsweep_~space#1_77| Int)) (and (<= 1 |v_ULTIMATE.start_downsweep_~space#1_77|) (= |c_ULTIMATE.start_downsweep_~space#1| (div |v_ULTIMATE.start_downsweep_~space#1_77| 2)))) (and (exists ((|v_ULTIMATE.start_upsweep_~a#1.offset_48| Int) (|v_ULTIMATE.start_upsweep_~a#1.base_48| Int) (|v_ULTIMATE.start_upsweep_~space~0#1_92| Int) (|v_ULTIMATE.start_upsweep_~n#1_57| Int)) (let ((.cse2 (= (mod |v_ULTIMATE.start_upsweep_~space~0#1_92| 2) 0)) (.cse10 (<= 2 |v_ULTIMATE.start_upsweep_~n#1_57|)) (.cse12 (<= 2 |c_ULTIMATE.start_main_~n~0#1|)) (.cse3 (<= 1 |c_#StackHeapBarrier|)) (.cse4 (<= |c_ULTIMATE.start_main_~n~0#1| 1073741823)) (.cse5 (= |v_ULTIMATE.start_upsweep_~space~0#1_92| 1)) (.cse6 (<= 0 |c_ULTIMATE.start_main_~n~0#1|)) (.cse11 (<= |v_ULTIMATE.start_upsweep_~n#1_57| 1073741823)) (.cse7 (= |c_ULTIMATE.start_main_~a0~0#1.offset| 0)) (.cse8 (= |c_ULTIMATE.start_main_~a~0#1.offset| 0)) (.cse9 (= |v_ULTIMATE.start_upsweep_~a#1.offset_48| 0))) (and (<= |v_ULTIMATE.start_upsweep_~space~0#1_92| 2147483647) (<= 0 (+ |v_ULTIMATE.start_upsweep_~space~0#1_92| 2147483648)) (let ((.cse1 (+ |v_ULTIMATE.start_upsweep_~space~0#1_92| 1)) (.cse0 (div |v_ULTIMATE.start_upsweep_~space~0#1_92| 2))) (or (and (= |c_ULTIMATE.start_downsweep_~space#1| (+ .cse0 1)) (<= .cse1 0) (not .cse2)) (and (or .cse2 (< 0 .cse1)) (= |c_ULTIMATE.start_downsweep_~space#1| .cse0)))) (<= |v_ULTIMATE.start_upsweep_~n#1_57| |v_ULTIMATE.start_upsweep_~space~0#1_92|) (or (and (= |v_ULTIMATE.start_upsweep_~a#1.base_48| |c_ULTIMATE.start_main_~a~0#1.base|) .cse3 .cse4 .cse5 .cse6 (= |c_ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_upsweep_~n#1_57|) .cse7 .cse8 .cse9) (and .cse2 .cse3 .cse4 .cse10 .cse11 .cse7 .cse12 .cse8 .cse9)) (or (and .cse3 .cse4 .cse10 .cse11 .cse7 .cse12 .cse8 .cse9) (and .cse3 .cse4 (<= 0 |v_ULTIMATE.start_upsweep_~n#1_57|) .cse5 .cse6 .cse11 .cse7 .cse8 .cse9))))) (= |c_ULTIMATE.start_main_~a~0#1.offset| |c_ULTIMATE.start_downsweep_~a#1.offset|) (= |c_ULTIMATE.start_downsweep_~a#1.base| |c_ULTIMATE.start_main_~a~0#1.base|) (exists ((|v_#memory_int_371| (Array Int (Array Int Int)))) (= (store |v_#memory_int_371| |c_ULTIMATE.start_downsweep_~a#1.base| (store (select |v_#memory_int_371| |c_ULTIMATE.start_downsweep_~a#1.base|) (+ (* |c_ULTIMATE.start_downsweep_~n#1| 4) (- 4) |c_ULTIMATE.start_downsweep_~a#1.offset|) 0)) |c_#memory_int|)) (= |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_downsweep_~n#1|))) is different from true [2024-11-09 07:26:46,059 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8372#(and (= |ULTIMATE.start_check_~sum~0#1| 0) (= |ULTIMATE.start_check_~i~0#1| 0) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_check_~a0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) |ULTIMATE.start_check_~a#1.offset|) 0)) (<= 1 |ULTIMATE.start_check_~n#1|) (exists ((|v_ULTIMATE.start_downsweep_~space#1_79| Int)) (and (<= |v_ULTIMATE.start_downsweep_~space#1_79| 0) (exists ((|v_ULTIMATE.start_downsweep_~space#1_77| Int)) (and (= (div |v_ULTIMATE.start_downsweep_~space#1_77| 2) |v_ULTIMATE.start_downsweep_~space#1_79|) (<= 1 |v_ULTIMATE.start_downsweep_~space#1_77|))))))' at error location [2024-11-09 07:26:46,060 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:26:46,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:26:46,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2024-11-09 07:26:46,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942080647] [2024-11-09 07:26:46,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:26:46,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 07:26:46,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:26:46,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 07:26:46,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1750, Unknown=5, NotChecked=84, Total=1980 [2024-11-09 07:26:46,062 INFO L87 Difference]: Start difference. First operand 109 states and 134 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:26:46,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:26:46,255 INFO L93 Difference]: Finished difference Result 127 states and 156 transitions. [2024-11-09 07:26:46,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 07:26:46,256 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 55 [2024-11-09 07:26:46,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:26:46,257 INFO L225 Difference]: With dead ends: 127 [2024-11-09 07:26:46,257 INFO L226 Difference]: Without dead ends: 84 [2024-11-09 07:26:46,258 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 124 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=149, Invalid=1830, Unknown=5, NotChecked=86, Total=2070 [2024-11-09 07:26:46,258 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 11 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:26:46,259 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 202 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:26:46,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-09 07:26:46,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2024-11-09 07:26:46,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 76 states have (on average 1.2105263157894737) internal successors, (92), 76 states have internal predecessors, (92), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:26:46,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2024-11-09 07:26:46,287 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 55 [2024-11-09 07:26:46,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:26:46,287 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2024-11-09 07:26:46,287 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:26:46,287 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2024-11-09 07:26:46,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-09 07:26:46,288 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:26:46,288 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:26:46,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-09 07:26:46,492 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 07:26:46,492 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:26:46,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:26:46,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1641394681, now seen corresponding path program 2 times [2024-11-09 07:26:46,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:26:46,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117421904] [2024-11-09 07:26:46,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:26:46,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:26:46,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:26:46,793 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 07:26:46,793 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:26:46,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117421904] [2024-11-09 07:26:46,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117421904] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:26:46,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983652663] [2024-11-09 07:26:46,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:26:46,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:26:46,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:26:46,796 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:26:46,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 07:26:46,972 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 07:26:46,972 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:26:46,974 INFO L255 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 07:26:46,976 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:26:47,191 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 07:26:47,191 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:26:47,347 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 07:26:47,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983652663] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:26:47,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1186654069] [2024-11-09 07:26:47,350 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2024-11-09 07:26:47,350 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:26:47,350 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:26:47,351 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:26:47,351 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:26:49,460 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 69 for LOIs [2024-11-09 07:26:49,470 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2024-11-09 07:26:49,478 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:26:54,799 WARN L873 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_downsweep_~space#1_83| Int)) (and (<= 1 |v_ULTIMATE.start_downsweep_~space#1_83|) (= |c_ULTIMATE.start_downsweep_~space#1| (div |v_ULTIMATE.start_downsweep_~space#1_83| 2)))) (and (exists ((|v_#memory_int_401| (Array Int (Array Int Int)))) (= (store |v_#memory_int_401| |c_ULTIMATE.start_downsweep_~a#1.base| (store (select |v_#memory_int_401| |c_ULTIMATE.start_downsweep_~a#1.base|) (+ (* |c_ULTIMATE.start_downsweep_~n#1| 4) (- 4) |c_ULTIMATE.start_downsweep_~a#1.offset|) 0)) |c_#memory_int|)) (exists ((|v_ULTIMATE.start_upsweep_~space~0#1_99| Int) (|v_ULTIMATE.start_upsweep_~n#1_61| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_51| Int) (|v_ULTIMATE.start_upsweep_~a#1.base_51| Int)) (let ((.cse2 (= (mod |v_ULTIMATE.start_upsweep_~space~0#1_99| 2) 0)) (.cse9 (= |v_ULTIMATE.start_upsweep_~space~0#1_99| 1)) (.cse10 (<= 0 |c_ULTIMATE.start_main_~n~0#1|)) (.cse0 (<= 1 |c_#StackHeapBarrier|)) (.cse1 (<= |c_ULTIMATE.start_main_~n~0#1| 1073741823)) (.cse3 (<= |v_ULTIMATE.start_upsweep_~n#1_61| 1073741823)) (.cse4 (<= 2 |v_ULTIMATE.start_upsweep_~n#1_61|)) (.cse5 (= |c_ULTIMATE.start_main_~a0~0#1.offset| 0)) (.cse6 (<= 2 |c_ULTIMATE.start_main_~n~0#1|)) (.cse7 (= |v_ULTIMATE.start_upsweep_~a#1.offset_51| 0)) (.cse8 (= |c_ULTIMATE.start_main_~a~0#1.offset| 0))) (and (<= 0 (+ |v_ULTIMATE.start_upsweep_~space~0#1_99| 2147483648)) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 (<= (+ (div (* (- 1) |v_ULTIMATE.start_upsweep_~space~0#1_99|) 2) 1) 0)) (and (= |c_ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_upsweep_~n#1_61|) .cse9 .cse0 .cse1 .cse10 .cse5 .cse7 .cse8 (= |v_ULTIMATE.start_upsweep_~a#1.base_51| |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse12 (div |v_ULTIMATE.start_upsweep_~space~0#1_99| 2)) (.cse11 (+ |v_ULTIMATE.start_upsweep_~space~0#1_99| 1))) (or (and (<= .cse11 0) (= |c_ULTIMATE.start_downsweep_~space#1| (+ .cse12 1)) (not .cse2)) (and (= |c_ULTIMATE.start_downsweep_~space#1| .cse12) (or (< 0 .cse11) .cse2)))) (or (and .cse9 .cse0 .cse1 .cse3 .cse10 .cse5 .cse7 .cse8 (<= 0 |v_ULTIMATE.start_upsweep_~n#1_61|)) (and .cse0 .cse1 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8)) (<= |v_ULTIMATE.start_upsweep_~space~0#1_99| 2147483647) (<= |v_ULTIMATE.start_upsweep_~n#1_61| |v_ULTIMATE.start_upsweep_~space~0#1_99|)))) (= |c_ULTIMATE.start_main_~a~0#1.offset| |c_ULTIMATE.start_downsweep_~a#1.offset|) (= |c_ULTIMATE.start_downsweep_~a#1.base| |c_ULTIMATE.start_main_~a~0#1.base|) (= |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_downsweep_~n#1|))) is different from true [2024-11-09 07:26:58,828 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9055#(and (<= (+ |ULTIMATE.start_check_~i~0#1| 1) |ULTIMATE.start_check_~n#1|) (<= 0 |ULTIMATE.start_check_~i~0#1|) (not (= |ULTIMATE.start_check_~sum~0#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4))))))' at error location [2024-11-09 07:26:58,828 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:26:58,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:26:58,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 18 [2024-11-09 07:26:58,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774170769] [2024-11-09 07:26:58,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:26:58,828 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 07:26:58,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:26:58,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 07:26:58,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=2382, Unknown=5, NotChecked=98, Total=2652 [2024-11-09 07:26:58,829 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand has 18 states, 18 states have (on average 4.611111111111111) internal successors, (83), 18 states have internal predecessors, (83), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:26:59,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:26:59,125 INFO L93 Difference]: Finished difference Result 98 states and 115 transitions. [2024-11-09 07:26:59,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 07:26:59,125 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.611111111111111) internal successors, (83), 18 states have internal predecessors, (83), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 55 [2024-11-09 07:26:59,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:26:59,126 INFO L225 Difference]: With dead ends: 98 [2024-11-09 07:26:59,126 INFO L226 Difference]: Without dead ends: 65 [2024-11-09 07:26:59,127 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 121 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=181, Invalid=2574, Unknown=5, NotChecked=102, Total=2862 [2024-11-09 07:26:59,127 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 10 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:26:59,128 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 192 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 07:26:59,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-09 07:26:59,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2024-11-09 07:26:59,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 51 states have internal predecessors, (62), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:26:59,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2024-11-09 07:26:59,146 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 55 [2024-11-09 07:26:59,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:26:59,146 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2024-11-09 07:26:59,146 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.611111111111111) internal successors, (83), 18 states have internal predecessors, (83), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:26:59,146 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2024-11-09 07:26:59,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-09 07:26:59,147 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:26:59,147 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:26:59,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-09 07:26:59,347 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 07:26:59,348 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:26:59,348 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:26:59,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1341881057, now seen corresponding path program 6 times [2024-11-09 07:26:59,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:26:59,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116994882] [2024-11-09 07:26:59,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:26:59,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:26:59,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:26:59,506 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 07:26:59,506 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:26:59,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116994882] [2024-11-09 07:26:59,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116994882] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:26:59,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187661220] [2024-11-09 07:26:59,507 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 07:26:59,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:26:59,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:26:59,508 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:26:59,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 07:26:59,704 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 07:26:59,705 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:26:59,706 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 07:26:59,707 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:26:59,753 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 07:26:59,753 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:26:59,904 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 07:26:59,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187661220] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:26:59,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [834711557] [2024-11-09 07:26:59,905 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2024-11-09 07:26:59,905 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:26:59,905 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:26:59,905 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:26:59,906 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:27:01,652 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 69 for LOIs [2024-11-09 07:27:01,661 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2024-11-09 07:27:01,668 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:27:06,544 WARN L873 $PredicateComparison]: unable to prove that (or (and (exists ((|v_ULTIMATE.start_upsweep_~space~0#1_109| Int) (|v_ULTIMATE.start_upsweep_~n#1_64| Int) (|v_ULTIMATE.start_upsweep_~a#1.base_54| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_54| Int)) (let ((.cse4 (<= 2 |v_ULTIMATE.start_upsweep_~n#1_64|)) (.cse5 (<= 2 |c_ULTIMATE.start_main_~n~0#1|)) (.cse7 (<= |v_ULTIMATE.start_upsweep_~n#1_64| 1073741823)) (.cse0 (= |v_ULTIMATE.start_upsweep_~a#1.offset_54| 0)) (.cse8 (= |v_ULTIMATE.start_upsweep_~space~0#1_109| 1)) (.cse1 (<= 1 |c_#StackHeapBarrier|)) (.cse2 (<= |c_ULTIMATE.start_main_~n~0#1| 1073741823)) (.cse9 (<= 0 |c_ULTIMATE.start_main_~n~0#1|)) (.cse3 (= |c_ULTIMATE.start_main_~a0~0#1.offset| 0)) (.cse6 (= |c_ULTIMATE.start_main_~a~0#1.offset| 0)) (.cse10 (= (mod |v_ULTIMATE.start_upsweep_~space~0#1_109| 2) 0))) (and (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7) (and (<= 0 |v_ULTIMATE.start_upsweep_~n#1_64|) .cse0 .cse8 .cse1 .cse2 .cse9 .cse3 .cse6 .cse7)) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 (<= (+ (div (* (- 1) |v_ULTIMATE.start_upsweep_~space~0#1_109|) 2) 1) 0) .cse7 .cse10) (and (= |c_ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_upsweep_~n#1_64|) .cse0 .cse8 .cse1 .cse2 .cse9 .cse3 .cse6 (= |v_ULTIMATE.start_upsweep_~a#1.base_54| |c_ULTIMATE.start_main_~a~0#1.base|))) (<= |v_ULTIMATE.start_upsweep_~space~0#1_109| 2147483647) (<= |v_ULTIMATE.start_upsweep_~n#1_64| |v_ULTIMATE.start_upsweep_~space~0#1_109|) (<= 0 (+ |v_ULTIMATE.start_upsweep_~space~0#1_109| 2147483648)) (let ((.cse11 (div |v_ULTIMATE.start_upsweep_~space~0#1_109| 2)) (.cse12 (+ |v_ULTIMATE.start_upsweep_~space~0#1_109| 1))) (or (and (not .cse10) (= |c_ULTIMATE.start_downsweep_~space#1| (+ .cse11 1)) (<= .cse12 0)) (and (= |c_ULTIMATE.start_downsweep_~space#1| .cse11) (or (< 0 .cse12) .cse10))))))) (= |c_ULTIMATE.start_main_~a~0#1.offset| |c_ULTIMATE.start_downsweep_~a#1.offset|) (= |c_ULTIMATE.start_downsweep_~a#1.base| |c_ULTIMATE.start_main_~a~0#1.base|) (exists ((|v_#memory_int_433| (Array Int (Array Int Int)))) (= (store |v_#memory_int_433| |c_ULTIMATE.start_downsweep_~a#1.base| (store (select |v_#memory_int_433| |c_ULTIMATE.start_downsweep_~a#1.base|) (+ (* |c_ULTIMATE.start_downsweep_~n#1| 4) (- 4) |c_ULTIMATE.start_downsweep_~a#1.offset|) 0)) |c_#memory_int|)) (= |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_downsweep_~n#1|)) (exists ((|v_ULTIMATE.start_downsweep_~space#1_91| Int)) (and (= |c_ULTIMATE.start_downsweep_~space#1| (div |v_ULTIMATE.start_downsweep_~space#1_91| 2)) (<= 1 |v_ULTIMATE.start_downsweep_~space#1_91|)))) is different from true [2024-11-09 07:27:12,793 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9667#(and (= |ULTIMATE.start_check_~sum~0#1| 0) (= |ULTIMATE.start_check_~i~0#1| 0) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_check_~a0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) |ULTIMATE.start_check_~a#1.offset|) 0)) (<= 1 |ULTIMATE.start_check_~n#1|) (exists ((|v_ULTIMATE.start_downsweep_~space#1_93| Int)) (and (<= |v_ULTIMATE.start_downsweep_~space#1_93| 0) (exists ((|v_ULTIMATE.start_downsweep_~space#1_91| Int)) (and (= (div |v_ULTIMATE.start_downsweep_~space#1_91| 2) |v_ULTIMATE.start_downsweep_~space#1_93|) (<= 1 |v_ULTIMATE.start_downsweep_~space#1_91|))))))' at error location [2024-11-09 07:27:12,793 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:27:12,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:27:12,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 9 [2024-11-09 07:27:12,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92431759] [2024-11-09 07:27:12,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:27:12,794 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 07:27:12,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:27:12,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 07:27:12,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1423, Unknown=6, NotChecked=76, Total=1640 [2024-11-09 07:27:12,795 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:27:12,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:27:12,930 INFO L93 Difference]: Finished difference Result 80 states and 96 transitions. [2024-11-09 07:27:12,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 07:27:12,931 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 57 [2024-11-09 07:27:12,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:27:12,932 INFO L225 Difference]: With dead ends: 80 [2024-11-09 07:27:12,932 INFO L226 Difference]: Without dead ends: 73 [2024-11-09 07:27:12,932 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 131 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=135, Invalid=1423, Unknown=6, NotChecked=76, Total=1640 [2024-11-09 07:27:12,933 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 13 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:27:12,933 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 145 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:27:12,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-09 07:27:12,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2024-11-09 07:27:12,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 55 states have internal predecessors, (68), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:27:12,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2024-11-09 07:27:12,964 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 57 [2024-11-09 07:27:12,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:27:12,964 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2024-11-09 07:27:12,964 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:27:12,964 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2024-11-09 07:27:12,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-09 07:27:12,965 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:27:12,965 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:27:12,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-09 07:27:13,165 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 07:27:13,166 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:27:13,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:27:13,170 INFO L85 PathProgramCache]: Analyzing trace with hash -2109710296, now seen corresponding path program 7 times [2024-11-09 07:27:13,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:27:13,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408159901] [2024-11-09 07:27:13,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:27:13,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:27:13,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:27:13,529 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-09 07:27:13,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:27:13,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408159901] [2024-11-09 07:27:13,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408159901] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:27:13,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302390749] [2024-11-09 07:27:13,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 07:27:13,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:27:13,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:27:13,535 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:27:13,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 07:27:13,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:27:13,722 INFO L255 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 94 conjuncts are in the unsatisfiable core [2024-11-09 07:27:13,730 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:27:13,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-11-09 07:27:13,793 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 7 treesize of output 6 [2024-11-09 07:27:13,874 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2024-11-09 07:27:13,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2024-11-09 07:27:13,950 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 15 treesize of output 10 [2024-11-09 07:27:14,010 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 15 treesize of output 10 [2024-11-09 07:27:14,096 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 15 treesize of output 10 [2024-11-09 07:27:14,224 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 15 treesize of output 10 [2024-11-09 07:27:14,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 23 [2024-11-09 07:27:14,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 42 [2024-11-09 07:27:15,103 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 64 treesize of output 57 [2024-11-09 07:27:15,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 115 [2024-11-09 07:27:17,555 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 150 treesize of output 135 [2024-11-09 07:27:27,391 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 235 treesize of output 211 [2024-11-09 07:27:27,567 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 07:27:27,567 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:27:49,917 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_588 Int) (|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_590 Int) (|v_ULTIMATE.start_upsweep_~left~0#1_185| Int) (|v_ULTIMATE.start_upsweep_~left~0#1_183| Int) (v_ArrVal_585 (Array Int Int))) (or (< |v_ULTIMATE.start_upsweep_~left~0#1_183| 1) (= (let ((.cse1 (+ |ULTIMATE.start_main_~a~0#1.offset| 4))) (select (store (store (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| v_ArrVal_585) |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse0 .cse1 (+ (select .cse0 .cse1) (select .cse0 |ULTIMATE.start_main_~a~0#1.offset|)))) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_upsweep_~left~0#1_185| 4) 4) v_ArrVal_588) (+ |ULTIMATE.start_main_~a~0#1.offset| 8 (* |v_ULTIMATE.start_upsweep_~left~0#1_183| 4)) v_ArrVal_590) .cse1)) 0) (< |v_ULTIMATE.start_upsweep_~left~0#1_185| 2))) is different from false [2024-11-09 07:27:49,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302390749] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:27:49,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [10380404] [2024-11-09 07:27:49,959 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2024-11-09 07:27:49,960 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:27:49,960 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:27:49,960 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:27:49,960 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:27:51,721 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 69 for LOIs [2024-11-09 07:27:51,739 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2024-11-09 07:27:51,752 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:28:00,694 WARN L873 $PredicateComparison]: unable to prove that (or (and (exists ((|v_#memory_int_480| (Array Int (Array Int Int)))) (= (store |v_#memory_int_480| |c_ULTIMATE.start_downsweep_~a#1.base| (store (select |v_#memory_int_480| |c_ULTIMATE.start_downsweep_~a#1.base|) (+ (* |c_ULTIMATE.start_downsweep_~n#1| 4) (- 4) |c_ULTIMATE.start_downsweep_~a#1.offset|) 0)) |c_#memory_int|)) (= |c_ULTIMATE.start_main_~a~0#1.offset| |c_ULTIMATE.start_downsweep_~a#1.offset|) (= |c_ULTIMATE.start_downsweep_~a#1.base| |c_ULTIMATE.start_main_~a~0#1.base|) (exists ((|v_ULTIMATE.start_upsweep_~a#1.base_57| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_57| Int) (|v_ULTIMATE.start_upsweep_~space~0#1_120| Int) (|v_ULTIMATE.start_upsweep_~n#1_67| Int)) (let ((.cse2 (= (mod |v_ULTIMATE.start_upsweep_~space~0#1_120| 2) 0)) (.cse11 (= |v_ULTIMATE.start_upsweep_~space~0#1_120| 1)) (.cse12 (<= 0 |c_ULTIMATE.start_main_~n~0#1|)) (.cse3 (<= 1 |c_#StackHeapBarrier|)) (.cse4 (<= 2 |v_ULTIMATE.start_upsweep_~n#1_67|)) (.cse5 (<= |c_ULTIMATE.start_main_~n~0#1| 1073741823)) (.cse6 (= |v_ULTIMATE.start_upsweep_~a#1.offset_57| 0)) (.cse7 (<= |v_ULTIMATE.start_upsweep_~n#1_67| 1073741823)) (.cse8 (= |c_ULTIMATE.start_main_~a0~0#1.offset| 0)) (.cse9 (<= 2 |c_ULTIMATE.start_main_~n~0#1|)) (.cse10 (= |c_ULTIMATE.start_main_~a~0#1.offset| 0))) (and (let ((.cse0 (div |v_ULTIMATE.start_upsweep_~space~0#1_120| 2)) (.cse1 (+ |v_ULTIMATE.start_upsweep_~space~0#1_120| 1))) (or (and (= |c_ULTIMATE.start_downsweep_~space#1| .cse0) (or (< 0 .cse1) .cse2)) (and (= |c_ULTIMATE.start_downsweep_~space#1| (+ .cse0 1)) (not .cse2) (<= .cse1 0)))) (<= 0 (+ |v_ULTIMATE.start_upsweep_~space~0#1_120| 2147483648)) (or (and .cse3 .cse4 .cse5 .cse6 .cse2 .cse7 .cse8 .cse9 .cse10) (and (= |v_ULTIMATE.start_upsweep_~a#1.base_57| |c_ULTIMATE.start_main_~a~0#1.base|) (= |c_ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_upsweep_~n#1_67|) .cse3 .cse5 .cse11 .cse6 .cse12 .cse8 .cse10)) (<= |v_ULTIMATE.start_upsweep_~n#1_67| |v_ULTIMATE.start_upsweep_~space~0#1_120|) (or (and .cse3 .cse5 .cse11 .cse6 .cse7 .cse12 .cse8 (<= 0 |v_ULTIMATE.start_upsweep_~n#1_67|) .cse10) (and .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10)) (<= |v_ULTIMATE.start_upsweep_~space~0#1_120| 2147483647)))) (= |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_downsweep_~n#1|)) (exists ((|v_ULTIMATE.start_downsweep_~space#1_101| Int)) (and (= |c_ULTIMATE.start_downsweep_~space#1| (div |v_ULTIMATE.start_downsweep_~space#1_101| 2)) (<= 1 |v_ULTIMATE.start_downsweep_~space#1_101|)))) is different from true [2024-11-09 07:28:16,164 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10281#(and (= |ULTIMATE.start_check_~sum~0#1| 0) (= |ULTIMATE.start_check_~i~0#1| 0) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_check_~a0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) |ULTIMATE.start_check_~a#1.offset|) 0)) (<= 1 |ULTIMATE.start_check_~n#1|) (exists ((|v_ULTIMATE.start_downsweep_~space#1_103| Int)) (and (<= |v_ULTIMATE.start_downsweep_~space#1_103| 0) (exists ((|v_ULTIMATE.start_downsweep_~space#1_101| Int)) (and (<= 1 |v_ULTIMATE.start_downsweep_~space#1_101|) (= |v_ULTIMATE.start_downsweep_~space#1_103| (div |v_ULTIMATE.start_downsweep_~space#1_101| 2)))))))' at error location [2024-11-09 07:28:16,164 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:28:16,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 07:28:16,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 32] total 40 [2024-11-09 07:28:16,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882996667] [2024-11-09 07:28:16,165 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 07:28:16,165 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-09 07:28:16,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:28:16,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-09 07:28:16,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=8370, Unknown=31, NotChecked=374, Total=9312 [2024-11-09 07:28:16,168 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 40 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 37 states have internal predecessors, (88), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-09 07:28:28,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:28:28,581 INFO L93 Difference]: Finished difference Result 132 states and 167 transitions. [2024-11-09 07:28:28,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-09 07:28:28,582 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 37 states have internal predecessors, (88), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 61 [2024-11-09 07:28:28,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:28:28,583 INFO L225 Difference]: With dead ends: 132 [2024-11-09 07:28:28,583 INFO L226 Difference]: Without dead ends: 96 [2024-11-09 07:28:28,585 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 4669 ImplicationChecksByTransitivity, 67.4s TimeCoverageRelationStatistics Valid=1183, Invalid=14542, Unknown=33, NotChecked=498, Total=16256 [2024-11-09 07:28:28,585 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 251 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 1485 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 1529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-11-09 07:28:28,585 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 225 Invalid, 1529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1485 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-11-09 07:28:28,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-09 07:28:28,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 67. [2024-11-09 07:28:28,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 59 states have internal predecessors, (71), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:28:28,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2024-11-09 07:28:28,623 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 61 [2024-11-09 07:28:28,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:28:28,624 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2024-11-09 07:28:28,624 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 37 states have internal predecessors, (88), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-09 07:28:28,624 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2024-11-09 07:28:28,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-09 07:28:28,625 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:28:28,625 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:28:28,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-09 07:28:28,826 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:28:28,826 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:28:28,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:28:28,827 INFO L85 PathProgramCache]: Analyzing trace with hash -743346348, now seen corresponding path program 3 times [2024-11-09 07:28:28,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:28:28,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735685937] [2024-11-09 07:28:28,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:28:28,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:28:28,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:28:29,186 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-09 07:28:29,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:28:29,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735685937] [2024-11-09 07:28:29,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735685937] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:28:29,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914665573] [2024-11-09 07:28:29,188 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 07:28:29,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:28:29,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:28:29,189 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:28:29,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-09 07:28:29,476 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 07:28:29,476 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:28:29,478 INFO L255 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 07:28:29,480 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:28:29,664 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-09 07:28:29,664 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:28:29,945 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-09 07:28:29,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914665573] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:28:29,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [549110672] [2024-11-09 07:28:29,947 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2024-11-09 07:28:29,947 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:28:29,947 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:28:29,947 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:28:29,947 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:28:32,383 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 69 for LOIs [2024-11-09 07:28:32,393 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2024-11-09 07:28:32,401 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:28:38,207 WARN L873 $PredicateComparison]: unable to prove that (or (and (exists ((|v_#memory_int_517| (Array Int (Array Int Int)))) (= (store |v_#memory_int_517| |c_ULTIMATE.start_downsweep_~a#1.base| (store (select |v_#memory_int_517| |c_ULTIMATE.start_downsweep_~a#1.base|) (+ (* |c_ULTIMATE.start_downsweep_~n#1| 4) (- 4) |c_ULTIMATE.start_downsweep_~a#1.offset|) 0)) |c_#memory_int|)) (exists ((|v_ULTIMATE.start_upsweep_~n#1_70| Int) (|v_ULTIMATE.start_upsweep_~a#1.base_60| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_60| Int) (|v_ULTIMATE.start_upsweep_~space~0#1_127| Int)) (let ((.cse2 (<= 0 |c_ULTIMATE.start_main_~n~0#1|)) (.cse5 (= |v_ULTIMATE.start_upsweep_~space~0#1_127| 1)) (.cse0 (<= 1 |c_#StackHeapBarrier|)) (.cse1 (<= |c_ULTIMATE.start_main_~n~0#1| 1073741823)) (.cse3 (= |v_ULTIMATE.start_upsweep_~a#1.offset_60| 0)) (.cse4 (= |c_ULTIMATE.start_main_~a0~0#1.offset| 0)) (.cse8 (<= 2 |c_ULTIMATE.start_main_~n~0#1|)) (.cse6 (= |c_ULTIMATE.start_main_~a~0#1.offset| 0)) (.cse7 (<= |v_ULTIMATE.start_upsweep_~n#1_70| 1073741823)) (.cse9 (<= 2 |v_ULTIMATE.start_upsweep_~n#1_70|)) (.cse10 (= (mod |v_ULTIMATE.start_upsweep_~space~0#1_127| 2) 0))) (and (<= |v_ULTIMATE.start_upsweep_~n#1_70| |v_ULTIMATE.start_upsweep_~space~0#1_127|) (<= 0 (+ |v_ULTIMATE.start_upsweep_~space~0#1_127| 2147483648)) (or (and .cse0 .cse1 .cse2 (<= 0 |v_ULTIMATE.start_upsweep_~n#1_70|) .cse3 .cse4 .cse5 .cse6 .cse7) (and .cse0 .cse1 .cse3 .cse4 .cse8 .cse6 .cse7 .cse9)) (or (and .cse0 .cse1 (= |v_ULTIMATE.start_upsweep_~a#1.base_60| |c_ULTIMATE.start_main_~a~0#1.base|) .cse2 .cse3 .cse4 (= |c_ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_upsweep_~n#1_70|) .cse5 .cse6) (and .cse10 .cse0 (<= (+ (div (* (- 1) |v_ULTIMATE.start_upsweep_~space~0#1_127|) 2) 1) 0) .cse1 .cse3 .cse4 .cse8 .cse6 .cse7 .cse9)) (let ((.cse12 (+ |v_ULTIMATE.start_upsweep_~space~0#1_127| 1)) (.cse11 (div |v_ULTIMATE.start_upsweep_~space~0#1_127| 2))) (or (and (= |c_ULTIMATE.start_downsweep_~space#1| .cse11) (or .cse10 (< 0 .cse12))) (and (<= .cse12 0) (not .cse10) (= |c_ULTIMATE.start_downsweep_~space#1| (+ .cse11 1))))) (<= |v_ULTIMATE.start_upsweep_~space~0#1_127| 2147483647)))) (= |c_ULTIMATE.start_main_~a~0#1.offset| |c_ULTIMATE.start_downsweep_~a#1.offset|) (= |c_ULTIMATE.start_downsweep_~a#1.base| |c_ULTIMATE.start_main_~a~0#1.base|) (= |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_downsweep_~n#1|)) (exists ((|v_ULTIMATE.start_downsweep_~space#1_110| Int)) (and (= |c_ULTIMATE.start_downsweep_~space#1| (div |v_ULTIMATE.start_downsweep_~space#1_110| 2)) (<= 1 |v_ULTIMATE.start_downsweep_~space#1_110|)))) is different from true [2024-11-09 07:28:46,571 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11081#(and (<= (+ |ULTIMATE.start_check_~i~0#1| 1) |ULTIMATE.start_check_~n#1|) (<= 0 |ULTIMATE.start_check_~i~0#1|) (not (= |ULTIMATE.start_check_~sum~0#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4))))))' at error location [2024-11-09 07:28:46,571 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:28:46,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:28:46,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 19 [2024-11-09 07:28:46,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416558599] [2024-11-09 07:28:46,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:28:46,572 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 07:28:46,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:28:46,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 07:28:46,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=2367, Unknown=8, NotChecked=98, Total=2652 [2024-11-09 07:28:46,573 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:28:51,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:28:51,082 INFO L93 Difference]: Finished difference Result 88 states and 108 transitions. [2024-11-09 07:28:51,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 07:28:51,082 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 67 [2024-11-09 07:28:51,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:28:51,083 INFO L225 Difference]: With dead ends: 88 [2024-11-09 07:28:51,084 INFO L226 Difference]: Without dead ends: 78 [2024-11-09 07:28:51,084 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 152 SyntacticMatches, 9 SemanticMatches, 57 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=253, Invalid=3045, Unknown=12, NotChecked=112, Total=3422 [2024-11-09 07:28:51,085 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 33 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:28:51,085 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 330 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 07:28:51,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-09 07:28:51,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 69. [2024-11-09 07:28:51,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 61 states have internal predecessors, (75), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:28:51,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 83 transitions. [2024-11-09 07:28:51,127 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 83 transitions. Word has length 67 [2024-11-09 07:28:51,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:28:51,127 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 83 transitions. [2024-11-09 07:28:51,127 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:28:51,127 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 83 transitions. [2024-11-09 07:28:51,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-09 07:28:51,128 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:28:51,128 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:28:51,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-09 07:28:51,329 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:28:51,329 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:28:51,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:28:51,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1110735623, now seen corresponding path program 4 times [2024-11-09 07:28:51,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:28:51,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067126603] [2024-11-09 07:28:51,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:28:51,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:28:51,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:28:51,774 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 07:28:51,774 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:28:51,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067126603] [2024-11-09 07:28:51,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067126603] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:28:51,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752830565] [2024-11-09 07:28:51,775 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 07:28:51,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:28:51,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:28:51,777 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:28:51,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-09 07:28:52,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:28:52,016 INFO L255 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 07:28:52,018 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:28:52,330 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 07:28:52,331 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:28:52,734 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 07:28:52,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752830565] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:28:52,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [463796445] [2024-11-09 07:28:52,736 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2024-11-09 07:28:52,737 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:28:52,737 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:28:52,738 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:28:52,738 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:28:55,493 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 69 for LOIs [2024-11-09 07:28:55,503 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2024-11-09 07:28:55,511 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:29:01,167 WARN L873 $PredicateComparison]: unable to prove that (or (and (exists ((|v_ULTIMATE.start_upsweep_~n#1_73| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_63| Int) (|v_ULTIMATE.start_upsweep_~space~0#1_137| Int) (|v_ULTIMATE.start_upsweep_~a#1.base_63| Int)) (let ((.cse7 (<= 2 |v_ULTIMATE.start_upsweep_~n#1_73|)) (.cse9 (<= 2 |c_ULTIMATE.start_main_~n~0#1|)) (.cse0 (<= 1 |c_#StackHeapBarrier|)) (.cse1 (<= |c_ULTIMATE.start_main_~n~0#1| 1073741823)) (.cse2 (<= 0 |c_ULTIMATE.start_main_~n~0#1|)) (.cse3 (= |c_ULTIMATE.start_main_~a0~0#1.offset| 0)) (.cse4 (= |v_ULTIMATE.start_upsweep_~space~0#1_137| 1)) (.cse5 (= |c_ULTIMATE.start_main_~a~0#1.offset| 0)) (.cse10 (<= |v_ULTIMATE.start_upsweep_~n#1_73| 1073741823)) (.cse6 (= |v_ULTIMATE.start_upsweep_~a#1.offset_63| 0)) (.cse8 (= (mod |v_ULTIMATE.start_upsweep_~space~0#1_137| 2) 0))) (and (or (and .cse0 .cse1 .cse2 .cse3 (= |v_ULTIMATE.start_upsweep_~a#1.base_63| |c_ULTIMATE.start_main_~a~0#1.base|) (= |c_ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_upsweep_~n#1_73|) .cse4 .cse5 .cse6) (and (<= (+ (div (* (- 1) |v_ULTIMATE.start_upsweep_~space~0#1_137|) 2) 1) 0) .cse0 .cse1 .cse7 .cse8 .cse3 .cse9 .cse5 .cse10 .cse6)) (<= |v_ULTIMATE.start_upsweep_~n#1_73| |v_ULTIMATE.start_upsweep_~space~0#1_137|) (<= 0 (+ |v_ULTIMATE.start_upsweep_~space~0#1_137| 2147483648)) (or (and .cse0 .cse1 .cse7 .cse3 .cse9 .cse5 .cse10 .cse6) (and .cse0 .cse1 (<= 0 |v_ULTIMATE.start_upsweep_~n#1_73|) .cse2 .cse3 .cse4 .cse5 .cse10 .cse6)) (let ((.cse11 (div |v_ULTIMATE.start_upsweep_~space~0#1_137| 2)) (.cse12 (+ |v_ULTIMATE.start_upsweep_~space~0#1_137| 1))) (or (and (= |c_ULTIMATE.start_downsweep_~space#1| (+ .cse11 1)) (<= .cse12 0) (not .cse8)) (and (= |c_ULTIMATE.start_downsweep_~space#1| .cse11) (or (< 0 .cse12) .cse8)))) (<= |v_ULTIMATE.start_upsweep_~space~0#1_137| 2147483647)))) (= |c_ULTIMATE.start_main_~a~0#1.offset| |c_ULTIMATE.start_downsweep_~a#1.offset|) (= |c_ULTIMATE.start_downsweep_~a#1.base| |c_ULTIMATE.start_main_~a~0#1.base|) (exists ((|v_#memory_int_555| (Array Int (Array Int Int)))) (= (store |v_#memory_int_555| |c_ULTIMATE.start_downsweep_~a#1.base| (store (select |v_#memory_int_555| |c_ULTIMATE.start_downsweep_~a#1.base|) (+ (* |c_ULTIMATE.start_downsweep_~n#1| 4) (- 4) |c_ULTIMATE.start_downsweep_~a#1.offset|) 0)) |c_#memory_int|)) (= |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_downsweep_~n#1|)) (exists ((|v_ULTIMATE.start_downsweep_~space#1_117| Int)) (and (= |c_ULTIMATE.start_downsweep_~space#1| (div |v_ULTIMATE.start_downsweep_~space#1_117| 2)) (<= 1 |v_ULTIMATE.start_downsweep_~space#1_117|)))) is different from true [2024-11-09 07:29:06,203 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11787#(and (<= (+ |ULTIMATE.start_check_~i~0#1| 1) |ULTIMATE.start_check_~n#1|) (<= 0 |ULTIMATE.start_check_~i~0#1|) (not (= |ULTIMATE.start_check_~sum~0#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4))))))' at error location [2024-11-09 07:29:06,203 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:29:06,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:29:06,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 20 [2024-11-09 07:29:06,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280626034] [2024-11-09 07:29:06,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:29:06,204 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 07:29:06,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:29:06,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 07:29:06,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=2581, Unknown=5, NotChecked=102, Total=2862 [2024-11-09 07:29:06,206 INFO L87 Difference]: Start difference. First operand 69 states and 83 transitions. Second operand has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:29:06,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:29:06,933 INFO L93 Difference]: Finished difference Result 117 states and 150 transitions. [2024-11-09 07:29:06,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 07:29:06,934 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 69 [2024-11-09 07:29:06,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:29:06,935 INFO L225 Difference]: With dead ends: 117 [2024-11-09 07:29:06,935 INFO L226 Difference]: Without dead ends: 97 [2024-11-09 07:29:06,936 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 157 SyntacticMatches, 8 SemanticMatches, 57 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=208, Invalid=3097, Unknown=5, NotChecked=112, Total=3422 [2024-11-09 07:29:06,936 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 40 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 07:29:06,936 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 314 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 07:29:06,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-11-09 07:29:06,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2024-11-09 07:29:06,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 83 states have (on average 1.2048192771084338) internal successors, (100), 83 states have internal predecessors, (100), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:29:06,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 108 transitions. [2024-11-09 07:29:06,979 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 108 transitions. Word has length 69 [2024-11-09 07:29:06,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:29:06,979 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 108 transitions. [2024-11-09 07:29:06,979 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:29:06,980 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 108 transitions. [2024-11-09 07:29:06,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-09 07:29:06,980 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:29:06,981 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:29:07,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-09 07:29:07,181 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-09 07:29:07,182 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:29:07,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:29:07,182 INFO L85 PathProgramCache]: Analyzing trace with hash -699043682, now seen corresponding path program 5 times [2024-11-09 07:29:07,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:29:07,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700584340] [2024-11-09 07:29:07,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:29:07,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:29:07,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:29:08,053 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-09 07:29:08,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:29:08,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700584340] [2024-11-09 07:29:08,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700584340] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:29:08,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50202294] [2024-11-09 07:29:08,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:29:08,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:29:08,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:29:08,057 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:29:08,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-09 07:29:08,374 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 07:29:08,375 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:29:08,377 INFO L255 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-09 07:29:08,380 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:29:09,483 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-09 07:29:09,483 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:29:10,121 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-09 07:29:10,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50202294] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:29:10,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1841450152] [2024-11-09 07:29:10,124 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2024-11-09 07:29:10,124 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:29:10,124 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:29:10,124 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:29:10,124 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:29:13,262 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 69 for LOIs [2024-11-09 07:29:13,272 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2024-11-09 07:29:13,280 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:29:19,487 WARN L873 $PredicateComparison]: unable to prove that (or (and (= |c_ULTIMATE.start_main_~a~0#1.offset| |c_ULTIMATE.start_downsweep_~a#1.offset|) (exists ((|v_ULTIMATE.start_upsweep_~a#1.base_66| Int) (|v_ULTIMATE.start_upsweep_~space~0#1_146| Int) (|v_ULTIMATE.start_upsweep_~n#1_77| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_66| Int)) (let ((.cse8 (= (mod |v_ULTIMATE.start_upsweep_~space~0#1_146| 2) 0)) (.cse0 (= |v_ULTIMATE.start_upsweep_~space~0#1_146| 1)) (.cse4 (<= 0 |c_ULTIMATE.start_main_~n~0#1|)) (.cse1 (= |v_ULTIMATE.start_upsweep_~a#1.offset_66| 0)) (.cse2 (<= 1 |c_#StackHeapBarrier|)) (.cse7 (<= 2 |v_ULTIMATE.start_upsweep_~n#1_77|)) (.cse3 (<= |c_ULTIMATE.start_main_~n~0#1| 1073741823)) (.cse9 (<= |v_ULTIMATE.start_upsweep_~n#1_77| 1073741823)) (.cse5 (= |c_ULTIMATE.start_main_~a0~0#1.offset| 0)) (.cse10 (<= 2 |c_ULTIMATE.start_main_~n~0#1|)) (.cse6 (= |c_ULTIMATE.start_main_~a~0#1.offset| 0))) (and (<= |v_ULTIMATE.start_upsweep_~space~0#1_146| 2147483647) (or (and .cse0 .cse1 (= |c_ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_upsweep_~n#1_77|) .cse2 .cse3 .cse4 .cse5 (= |v_ULTIMATE.start_upsweep_~a#1.base_66| |c_ULTIMATE.start_main_~a~0#1.base|) .cse6) (and .cse1 .cse2 .cse7 .cse3 .cse8 .cse9 .cse5 .cse10 .cse6 (<= (+ (div (* (- 1) |v_ULTIMATE.start_upsweep_~space~0#1_146|) 2) 1) 0))) (let ((.cse12 (+ |v_ULTIMATE.start_upsweep_~space~0#1_146| 1)) (.cse11 (div |v_ULTIMATE.start_upsweep_~space~0#1_146| 2))) (or (and (= |c_ULTIMATE.start_downsweep_~space#1| (+ .cse11 1)) (<= .cse12 0) (not .cse8)) (and (or (< 0 .cse12) .cse8) (= |c_ULTIMATE.start_downsweep_~space#1| .cse11)))) (or (and .cse0 .cse1 (<= 0 |v_ULTIMATE.start_upsweep_~n#1_77|) .cse2 .cse3 .cse9 .cse4 .cse5 .cse6) (and .cse1 .cse2 .cse7 .cse3 .cse9 .cse5 .cse10 .cse6)) (<= |v_ULTIMATE.start_upsweep_~n#1_77| |v_ULTIMATE.start_upsweep_~space~0#1_146|) (<= 0 (+ |v_ULTIMATE.start_upsweep_~space~0#1_146| 2147483648))))) (exists ((|v_#memory_int_596| (Array Int (Array Int Int)))) (= (store |v_#memory_int_596| |c_ULTIMATE.start_downsweep_~a#1.base| (store (select |v_#memory_int_596| |c_ULTIMATE.start_downsweep_~a#1.base|) (+ (* |c_ULTIMATE.start_downsweep_~n#1| 4) (- 4) |c_ULTIMATE.start_downsweep_~a#1.offset|) 0)) |c_#memory_int|)) (= |c_ULTIMATE.start_downsweep_~a#1.base| |c_ULTIMATE.start_main_~a~0#1.base|) (= |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_downsweep_~n#1|)) (exists ((|v_ULTIMATE.start_downsweep_~space#1_124| Int)) (and (<= 1 |v_ULTIMATE.start_downsweep_~space#1_124|) (= |c_ULTIMATE.start_downsweep_~space#1| (div |v_ULTIMATE.start_downsweep_~space#1_124| 2))))) is different from true [2024-11-09 07:29:24,427 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12590#(and (<= (+ |ULTIMATE.start_check_~i~0#1| 1) |ULTIMATE.start_check_~n#1|) (<= 0 |ULTIMATE.start_check_~i~0#1|) (not (= |ULTIMATE.start_check_~sum~0#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4))))))' at error location [2024-11-09 07:29:24,427 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:29:24,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:29:24,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2024-11-09 07:29:24,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892736336] [2024-11-09 07:29:24,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:29:24,428 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-09 07:29:24,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:29:24,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-09 07:29:24,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=3891, Unknown=5, NotChecked=126, Total=4290 [2024-11-09 07:29:24,430 INFO L87 Difference]: Start difference. First operand 91 states and 108 transitions. Second operand has 32 states, 28 states have (on average 3.357142857142857) internal successors, (94), 32 states have internal predecessors, (94), 7 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-09 07:29:26,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:29:26,884 INFO L93 Difference]: Finished difference Result 290 states and 359 transitions. [2024-11-09 07:29:26,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-09 07:29:26,885 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 3.357142857142857) internal successors, (94), 32 states have internal predecessors, (94), 7 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 7 states have call successors, (10) Word has length 71 [2024-11-09 07:29:26,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:29:26,887 INFO L225 Difference]: With dead ends: 290 [2024-11-09 07:29:26,887 INFO L226 Difference]: Without dead ends: 227 [2024-11-09 07:29:26,888 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2085 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=574, Invalid=6565, Unknown=5, NotChecked=166, Total=7310 [2024-11-09 07:29:26,888 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 324 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 07:29:26,888 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 355 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 07:29:26,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2024-11-09 07:29:27,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 170. [2024-11-09 07:29:27,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 156 states have (on average 1.1730769230769231) internal successors, (183), 156 states have internal predecessors, (183), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-09 07:29:27,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 203 transitions. [2024-11-09 07:29:27,002 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 203 transitions. Word has length 71 [2024-11-09 07:29:27,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:29:27,003 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 203 transitions. [2024-11-09 07:29:27,003 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 3.357142857142857) internal successors, (94), 32 states have internal predecessors, (94), 7 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-09 07:29:27,003 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 203 transitions. [2024-11-09 07:29:27,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-09 07:29:27,004 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:29:27,004 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:29:27,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-09 07:29:27,205 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-09 07:29:27,205 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:29:27,205 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:29:27,205 INFO L85 PathProgramCache]: Analyzing trace with hash 557713699, now seen corresponding path program 6 times [2024-11-09 07:29:27,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:29:27,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784275836] [2024-11-09 07:29:27,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:29:27,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:29:27,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:29:41,252 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 07:29:41,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:29:41,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784275836] [2024-11-09 07:29:41,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784275836] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:29:41,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436212749] [2024-11-09 07:29:41,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 07:29:41,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:29:41,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:29:41,254 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:29:41,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-09 07:29:41,716 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 07:29:41,717 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:29:41,721 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 138 conjuncts are in the unsatisfiable core [2024-11-09 07:29:41,729 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:29:41,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-11-09 07:29:41,984 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 7 treesize of output 6 [2024-11-09 07:29:42,312 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2024-11-09 07:29:42,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2024-11-09 07:29:42,475 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 15 treesize of output 10 [2024-11-09 07:29:42,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 28 treesize of output 24 [2024-11-09 07:29:43,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 35 treesize of output 31 [2024-11-09 07:29:43,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 41 treesize of output 37 [2024-11-09 07:29:43,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 48 treesize of output 42 [2024-11-09 07:29:44,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2024-11-09 07:29:45,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 60 [2024-11-09 07:29:46,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 81 treesize of output 69 [2024-11-09 07:29:46,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 63 [2024-11-09 07:29:47,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 74 [2024-11-09 07:29:48,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 74 [2024-11-09 07:29:49,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 102 treesize of output 92 [2024-11-09 07:29:54,286 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 0 case distinctions, treesize of input 213 treesize of output 177 [2024-11-09 07:29:54,592 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 07:29:54,592 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:30:55,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436212749] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:30:55,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1119553363] [2024-11-09 07:30:55,382 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2024-11-09 07:30:55,382 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:30:55,383 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:30:55,383 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:30:55,383 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:30:57,894 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 69 for LOIs [2024-11-09 07:30:57,909 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2024-11-09 07:30:57,923 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:31:13,179 WARN L873 $PredicateComparison]: unable to prove that (or (and (exists ((|v_ULTIMATE.start_upsweep_~a#1.base_69| Int) (|v_ULTIMATE.start_upsweep_~n#1_80| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_69| Int) (|v_ULTIMATE.start_upsweep_~space~0#1_157| Int)) (let ((.cse3 (<= |v_ULTIMATE.start_upsweep_~n#1_80| 1073741823)) (.cse4 (<= 2 |v_ULTIMATE.start_upsweep_~n#1_80|)) (.cse6 (<= 2 |c_ULTIMATE.start_main_~n~0#1|)) (.cse8 (= |v_ULTIMATE.start_upsweep_~space~0#1_157| 1)) (.cse0 (= |v_ULTIMATE.start_upsweep_~a#1.offset_69| 0)) (.cse1 (<= 1 |c_#StackHeapBarrier|)) (.cse2 (<= |c_ULTIMATE.start_main_~n~0#1| 1073741823)) (.cse9 (<= 0 |c_ULTIMATE.start_main_~n~0#1|)) (.cse5 (= |c_ULTIMATE.start_main_~a0~0#1.offset| 0)) (.cse7 (= |c_ULTIMATE.start_main_~a~0#1.offset| 0)) (.cse10 (= (mod |v_ULTIMATE.start_upsweep_~space~0#1_157| 2) 0))) (and (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7) (and .cse8 .cse0 .cse1 .cse2 .cse3 (<= 0 |v_ULTIMATE.start_upsweep_~n#1_80|) .cse9 .cse5 .cse7)) (<= |v_ULTIMATE.start_upsweep_~space~0#1_157| 2147483647) (or (and .cse0 .cse1 .cse2 .cse3 .cse10 .cse4 .cse5 .cse6 .cse7) (and .cse8 .cse0 .cse1 .cse2 (= |v_ULTIMATE.start_upsweep_~a#1.base_69| |c_ULTIMATE.start_main_~a~0#1.base|) .cse9 (= |c_ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_upsweep_~n#1_80|) .cse5 .cse7)) (<= 0 (+ |v_ULTIMATE.start_upsweep_~space~0#1_157| 2147483648)) (<= |v_ULTIMATE.start_upsweep_~n#1_80| |v_ULTIMATE.start_upsweep_~space~0#1_157|) (let ((.cse12 (+ |v_ULTIMATE.start_upsweep_~space~0#1_157| 1)) (.cse11 (div |v_ULTIMATE.start_upsweep_~space~0#1_157| 2))) (or (and (= |c_ULTIMATE.start_downsweep_~space#1| .cse11) (or (< 0 .cse12) .cse10)) (and (<= .cse12 0) (not .cse10) (= |c_ULTIMATE.start_downsweep_~space#1| (+ .cse11 1)))))))) (exists ((|v_#memory_int_648| (Array Int (Array Int Int)))) (= (store |v_#memory_int_648| |c_ULTIMATE.start_downsweep_~a#1.base| (store (select |v_#memory_int_648| |c_ULTIMATE.start_downsweep_~a#1.base|) (+ (* |c_ULTIMATE.start_downsweep_~n#1| 4) (- 4) |c_ULTIMATE.start_downsweep_~a#1.offset|) 0)) |c_#memory_int|)) (= |c_ULTIMATE.start_main_~a~0#1.offset| |c_ULTIMATE.start_downsweep_~a#1.offset|) (= |c_ULTIMATE.start_downsweep_~a#1.base| |c_ULTIMATE.start_main_~a~0#1.base|) (= |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_downsweep_~n#1|)) (exists ((|v_ULTIMATE.start_downsweep_~space#1_134| Int)) (and (<= 1 |v_ULTIMATE.start_downsweep_~space#1_134|) (= |c_ULTIMATE.start_downsweep_~space#1| (div |v_ULTIMATE.start_downsweep_~space#1_134| 2))))) is different from true [2024-11-09 07:31:21,050 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13819#(and (<= (+ |ULTIMATE.start_check_~i~0#1| 1) |ULTIMATE.start_check_~n#1|) (<= 0 |ULTIMATE.start_check_~i~0#1|) (not (= |ULTIMATE.start_check_~sum~0#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4))))))' at error location [2024-11-09 07:31:21,051 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:31:21,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 07:31:21,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38] total 71 [2024-11-09 07:31:21,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314142456] [2024-11-09 07:31:21,051 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 07:31:21,052 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-11-09 07:31:21,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:31:21,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-11-09 07:31:21,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=732, Invalid=16810, Unknown=18, NotChecked=262, Total=17822 [2024-11-09 07:31:21,055 INFO L87 Difference]: Start difference. First operand 170 states and 203 transitions. Second operand has 71 states, 64 states have (on average 1.796875) internal successors, (115), 65 states have internal predecessors, (115), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-09 07:31:56,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:31:56,981 INFO L93 Difference]: Finished difference Result 321 states and 385 transitions. [2024-11-09 07:31:56,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-09 07:31:56,982 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 64 states have (on average 1.796875) internal successors, (115), 65 states have internal predecessors, (115), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 73 [2024-11-09 07:31:56,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:31:56,984 INFO L225 Difference]: With dead ends: 321 [2024-11-09 07:31:56,984 INFO L226 Difference]: Without dead ends: 299 [2024-11-09 07:31:56,987 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 104 SyntacticMatches, 3 SemanticMatches, 172 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 7822 ImplicationChecksByTransitivity, 125.6s TimeCoverageRelationStatistics Valid=1734, Invalid=28008, Unknown=18, NotChecked=342, Total=30102 [2024-11-09 07:31:56,987 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 236 mSDsluCounter, 855 mSDsCounter, 0 mSdLazyCounter, 3180 mSolverCounterSat, 111 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 3292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 3180 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:31:56,988 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 888 Invalid, 3292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 3180 Invalid, 1 Unknown, 0 Unchecked, 8.1s Time] [2024-11-09 07:31:56,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2024-11-09 07:31:57,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 248. [2024-11-09 07:31:57,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 234 states have (on average 1.188034188034188) internal successors, (278), 234 states have internal predecessors, (278), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-09 07:31:57,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 298 transitions. [2024-11-09 07:31:57,087 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 298 transitions. Word has length 73 [2024-11-09 07:31:57,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:31:57,087 INFO L471 AbstractCegarLoop]: Abstraction has 248 states and 298 transitions. [2024-11-09 07:31:57,087 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 64 states have (on average 1.796875) internal successors, (115), 65 states have internal predecessors, (115), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-09 07:31:57,088 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 298 transitions. [2024-11-09 07:31:57,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-09 07:31:57,088 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:31:57,089 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:31:57,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-09 07:31:57,289 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-09 07:31:57,290 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:31:57,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:31:57,290 INFO L85 PathProgramCache]: Analyzing trace with hash 49445768, now seen corresponding path program 7 times [2024-11-09 07:31:57,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:31:57,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945951481] [2024-11-09 07:31:57,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:31:57,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:31:57,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:31:57,727 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 07:31:57,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:31:57,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945951481] [2024-11-09 07:31:57,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945951481] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:31:57,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189215141] [2024-11-09 07:31:57,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 07:31:57,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:31:57,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:31:57,732 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:31:57,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-09 07:31:57,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:31:57,965 INFO L255 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-09 07:31:57,967 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:31:58,131 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 13 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 07:31:58,131 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:31:58,320 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 13 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 07:31:58,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189215141] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:31:58,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1823221120] [2024-11-09 07:31:58,321 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2024-11-09 07:31:58,322 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:31:58,322 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:31:58,322 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:31:58,322 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:32:00,596 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 69 for LOIs [2024-11-09 07:32:00,603 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2024-11-09 07:32:00,610 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:32:05,925 WARN L873 $PredicateComparison]: unable to prove that (or (and (exists ((|v_ULTIMATE.start_upsweep_~space~0#1_164| Int) (|v_ULTIMATE.start_upsweep_~n#1_83| Int) (|v_ULTIMATE.start_upsweep_~a#1.base_72| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_72| Int)) (let ((.cse7 (<= 0 |c_ULTIMATE.start_main_~n~0#1|)) (.cse10 (= |v_ULTIMATE.start_upsweep_~space~0#1_164| 1)) (.cse3 (= |v_ULTIMATE.start_upsweep_~a#1.offset_72| 0)) (.cse4 (<= |v_ULTIMATE.start_upsweep_~n#1_83| 1073741823)) (.cse5 (<= 1 |c_#StackHeapBarrier|)) (.cse6 (<= |c_ULTIMATE.start_main_~n~0#1| 1073741823)) (.cse1 (= (mod |v_ULTIMATE.start_upsweep_~space~0#1_164| 2) 0)) (.cse8 (= |c_ULTIMATE.start_main_~a0~0#1.offset| 0)) (.cse11 (<= 2 |c_ULTIMATE.start_main_~n~0#1|)) (.cse12 (<= 2 |v_ULTIMATE.start_upsweep_~n#1_83|)) (.cse9 (= |c_ULTIMATE.start_main_~a~0#1.offset| 0))) (and (let ((.cse0 (+ |v_ULTIMATE.start_upsweep_~space~0#1_164| 1)) (.cse2 (div |v_ULTIMATE.start_upsweep_~space~0#1_164| 2))) (or (and (or (< 0 .cse0) .cse1) (= |c_ULTIMATE.start_downsweep_~space#1| .cse2)) (and (<= .cse0 0) (not .cse1) (= |c_ULTIMATE.start_downsweep_~space#1| (+ .cse2 1))))) (or (and .cse3 .cse4 .cse5 .cse6 (<= 0 |v_ULTIMATE.start_upsweep_~n#1_83|) .cse7 .cse8 .cse9 .cse10) (and .cse3 .cse4 .cse5 .cse6 .cse8 .cse11 .cse12 .cse9)) (or (and .cse3 .cse5 .cse6 (= |c_ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_upsweep_~n#1_83|) .cse7 .cse8 .cse9 (= |v_ULTIMATE.start_upsweep_~a#1.base_72| |c_ULTIMATE.start_main_~a~0#1.base|) .cse10) (and .cse3 .cse4 .cse5 .cse6 .cse1 .cse8 .cse11 .cse12 .cse9 (<= (+ (div (* (- 1) |v_ULTIMATE.start_upsweep_~space~0#1_164|) 2) 1) 0))) (<= |v_ULTIMATE.start_upsweep_~n#1_83| |v_ULTIMATE.start_upsweep_~space~0#1_164|) (<= |v_ULTIMATE.start_upsweep_~space~0#1_164| 2147483647) (<= 0 (+ |v_ULTIMATE.start_upsweep_~space~0#1_164| 2147483648))))) (= |c_ULTIMATE.start_main_~a~0#1.offset| |c_ULTIMATE.start_downsweep_~a#1.offset|) (= |c_ULTIMATE.start_downsweep_~a#1.base| |c_ULTIMATE.start_main_~a~0#1.base|) (exists ((|v_#memory_int_688| (Array Int (Array Int Int)))) (= |c_#memory_int| (store |v_#memory_int_688| |c_ULTIMATE.start_downsweep_~a#1.base| (store (select |v_#memory_int_688| |c_ULTIMATE.start_downsweep_~a#1.base|) (+ (* |c_ULTIMATE.start_downsweep_~n#1| 4) (- 4) |c_ULTIMATE.start_downsweep_~a#1.offset|) 0)))) (= |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_downsweep_~n#1|)) (exists ((|v_ULTIMATE.start_downsweep_~space#1_141| Int)) (and (<= 1 |v_ULTIMATE.start_downsweep_~space#1_141|) (= |c_ULTIMATE.start_downsweep_~space#1| (div |v_ULTIMATE.start_downsweep_~space#1_141| 2))))) is different from true [2024-11-09 07:32:10,552 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15235#(and (<= (+ |ULTIMATE.start_check_~i~0#1| 1) |ULTIMATE.start_check_~n#1|) (<= 0 |ULTIMATE.start_check_~i~0#1|) (not (= |ULTIMATE.start_check_~sum~0#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4))))))' at error location [2024-11-09 07:32:10,552 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:32:10,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:32:10,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2024-11-09 07:32:10,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936996815] [2024-11-09 07:32:10,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:32:10,552 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 07:32:10,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:32:10,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 07:32:10,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=2673, Unknown=5, NotChecked=104, Total=2970 [2024-11-09 07:32:10,553 INFO L87 Difference]: Start difference. First operand 248 states and 298 transitions. Second operand has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 21 states have internal predecessors, (71), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:32:11,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:32:11,133 INFO L93 Difference]: Finished difference Result 342 states and 413 transitions. [2024-11-09 07:32:11,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-09 07:32:11,134 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 21 states have internal predecessors, (71), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 75 [2024-11-09 07:32:11,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:32:11,135 INFO L225 Difference]: With dead ends: 342 [2024-11-09 07:32:11,135 INFO L226 Difference]: Without dead ends: 261 [2024-11-09 07:32:11,136 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 177 SyntacticMatches, 7 SemanticMatches, 59 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=254, Invalid=3285, Unknown=5, NotChecked=116, Total=3660 [2024-11-09 07:32:11,137 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 33 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:32:11,137 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 280 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 07:32:11,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2024-11-09 07:32:11,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 254. [2024-11-09 07:32:11,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 240 states have (on average 1.1833333333333333) internal successors, (284), 240 states have internal predecessors, (284), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-09 07:32:11,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 304 transitions. [2024-11-09 07:32:11,244 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 304 transitions. Word has length 75 [2024-11-09 07:32:11,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:32:11,244 INFO L471 AbstractCegarLoop]: Abstraction has 254 states and 304 transitions. [2024-11-09 07:32:11,245 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 21 states have internal predecessors, (71), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:32:11,245 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 304 transitions. [2024-11-09 07:32:11,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-09 07:32:11,246 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:32:11,246 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:32:11,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-09 07:32:11,446 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-09 07:32:11,447 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:32:11,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:32:11,447 INFO L85 PathProgramCache]: Analyzing trace with hash -632962198, now seen corresponding path program 8 times [2024-11-09 07:32:11,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:32:11,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642745514] [2024-11-09 07:32:11,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:32:11,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:32:11,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:32:27,795 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 60 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 07:32:27,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:32:27,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642745514] [2024-11-09 07:32:27,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642745514] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:32:27,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197038312] [2024-11-09 07:32:27,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:32:27,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:32:27,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:32:27,797 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:32:27,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-09 07:32:28,118 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-09 07:32:28,118 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:32:28,122 INFO L255 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 160 conjuncts are in the unsatisfiable core [2024-11-09 07:32:28,130 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:32:28,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-11-09 07:32:28,235 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 7 treesize of output 6 [2024-11-09 07:32:28,365 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 07:32:28,365 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 11 treesize of output 11 [2024-11-09 07:32:28,461 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 15 treesize of output 10 [2024-11-09 07:32:28,588 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 15 treesize of output 10 [2024-11-09 07:32:28,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 22 treesize of output 20 [2024-11-09 07:32:28,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 10 [2024-11-09 07:32:28,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 40 treesize of output 38 [2024-11-09 07:32:29,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:32:29,002 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 29 treesize of output 14 [2024-11-09 07:32:29,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 36 treesize of output 34 [2024-11-09 07:32:29,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:32:29,132 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 25 treesize of output 14 [2024-11-09 07:32:29,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2024-11-09 07:32:29,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 49 [2024-11-09 07:32:30,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 58 treesize of output 54 [2024-11-09 07:32:31,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2024-11-09 07:32:32,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 53 [2024-11-09 07:32:32,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 53 [2024-11-09 07:32:33,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 69 treesize of output 61 [2024-11-09 07:32:35,335 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 0 case distinctions, treesize of input 88 treesize of output 70 [2024-11-09 07:32:35,344 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 41 treesize of output 35 [2024-11-09 07:32:35,526 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 2 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 07:32:35,526 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:33:38,976 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_995 Int) (v_ArrVal_987 (Array Int Int)) (v_ArrVal_991 Int) (|v_ULTIMATE.start_main_~i~1#1_227| Int) (|v_ULTIMATE.start_main_#t~mem17#1_125| Int) (|ULTIMATE.start_main_~n~0#1| Int) (|v_ULTIMATE.start_upsweep_~left~0#1_292| Int) (v_ArrVal_1007 Int) (v_ArrVal_997 Int)) (or (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base| (let ((.cse10 (* 4 |v_ULTIMATE.start_main_~i~1#1_227|))) (store (store (let ((.cse9 (* |c_ULTIMATE.start_main_~i~1#1| 4))) (store v_ArrVal_987 (+ |c_ULTIMATE.start_main_~a0~0#1.offset| 4 .cse9) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base| v_ArrVal_987) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4 .cse9)))) (+ |c_ULTIMATE.start_main_~a0~0#1.offset| .cse10) v_ArrVal_991) (+ |c_ULTIMATE.start_main_~a0~0#1.offset| 4 .cse10) |v_ULTIMATE.start_main_#t~mem17#1_125|))))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse4 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse2 (+ (* |v_ULTIMATE.start_upsweep_~left~0#1_292| 4) |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse6 (+ 12 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse3 (+ (- 4) (* |ULTIMATE.start_main_~n~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse8 (store (store (store (store .cse1 .cse4 (+ (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) (select .cse1 .cse4))) .cse2 v_ArrVal_995) .cse6 v_ArrVal_997) .cse3 0))) (let ((.cse7 (+ (select .cse8 .cse6) (select .cse8 .cse4)))) (= (let ((.cse5 (select .cse8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ (select (select (store .cse0 |c_ULTIMATE.start_main_~a~0#1.base| (store (store (store (store (store (store .cse1 .cse2 v_ArrVal_995) .cse3 0) .cse4 .cse5) |c_ULTIMATE.start_main_~a~0#1.offset| 0) .cse6 v_ArrVal_1007) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse7)) |c_ULTIMATE.start_main_~a0~0#1.base|) (+ |c_ULTIMATE.start_main_~a0~0#1.offset| 4)) .cse5)) .cse7))))) (< (+ |v_ULTIMATE.start_upsweep_~left~0#1_292| 2) |ULTIMATE.start_main_~n~0#1|) (< |v_ULTIMATE.start_upsweep_~left~0#1_292| 0) (< |ULTIMATE.start_main_~n~0#1| (+ 2 |v_ULTIMATE.start_main_~i~1#1_227|)) (< 2 |v_ULTIMATE.start_upsweep_~left~0#1_292|) (< |v_ULTIMATE.start_main_~i~1#1_227| (+ |c_ULTIMATE.start_main_~i~1#1| 2)))) is different from false [2024-11-09 07:33:39,358 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_995 Int) (v_ArrVal_987 (Array Int Int)) (v_ArrVal_991 Int) (|v_ULTIMATE.start_main_~i~1#1_227| Int) (|v_ULTIMATE.start_main_#t~mem17#1_125| Int) (|ULTIMATE.start_main_~n~0#1| Int) (|v_ULTIMATE.start_upsweep_~left~0#1_292| Int) (v_ArrVal_1007 Int) (v_ArrVal_997 Int)) (or (< (+ |v_ULTIMATE.start_upsweep_~left~0#1_292| 2) |ULTIMATE.start_main_~n~0#1|) (< |ULTIMATE.start_main_~n~0#1| (+ 2 |v_ULTIMATE.start_main_~i~1#1_227|)) (let ((.cse8 (+ |c_ULTIMATE.start_main_#t~malloc16#1.offset| 4)) (.cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| (let ((.cse10 (* 4 |v_ULTIMATE.start_main_~i~1#1_227|))) (store (store (store v_ArrVal_987 .cse8 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| v_ArrVal_987) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5)) (+ |c_ULTIMATE.start_main_#t~malloc16#1.offset| .cse10) v_ArrVal_991) (+ |c_ULTIMATE.start_main_#t~malloc16#1.offset| 4 .cse10) |v_ULTIMATE.start_main_#t~mem17#1_125|))))) (let ((.cse2 (select .cse1 |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse3 (+ (* |v_ULTIMATE.start_upsweep_~left~0#1_292| 4) |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse6 (+ 12 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse4 (+ (- 4) (* |ULTIMATE.start_main_~n~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse9 (store (store (store (store .cse2 .cse5 (+ (select .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|) (select .cse2 .cse5))) .cse3 v_ArrVal_995) .cse6 v_ArrVal_997) .cse4 0))) (let ((.cse7 (+ (select .cse9 .cse6) (select .cse9 .cse5)))) (= (let ((.cse0 (select .cse9 |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse0 (select (select (store .cse1 |c_ULTIMATE.start_main_~a~0#1.base| (store (store (store (store (store (store .cse2 .cse3 v_ArrVal_995) .cse4 0) .cse5 .cse0) |c_ULTIMATE.start_main_~a~0#1.offset| 0) .cse6 v_ArrVal_1007) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse7)) |c_ULTIMATE.start_main_#t~malloc16#1.base|) .cse8))) .cse7)))))) (< |v_ULTIMATE.start_main_~i~1#1_227| 2) (< 2 |v_ULTIMATE.start_upsweep_~left~0#1_292|))) is different from false [2024-11-09 07:33:39,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197038312] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:33:39,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [348053928] [2024-11-09 07:33:39,480 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2024-11-09 07:33:39,480 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:33:39,480 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:33:39,480 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:33:39,481 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:33:41,805 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 69 for LOIs [2024-11-09 07:33:41,812 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2024-11-09 07:33:41,819 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:33:53,474 WARN L873 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_downsweep_~space#1_149| Int)) (and (= |c_ULTIMATE.start_downsweep_~space#1| (div |v_ULTIMATE.start_downsweep_~space#1_149| 2)) (<= 1 |v_ULTIMATE.start_downsweep_~space#1_149|))) (and (exists ((|v_ULTIMATE.start_upsweep_~space~0#1_174| Int) (|v_ULTIMATE.start_upsweep_~n#1_87| Int) (|v_ULTIMATE.start_upsweep_~a#1.base_75| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_75| Int)) (let ((.cse0 (<= |v_ULTIMATE.start_upsweep_~n#1_87| 1073741823)) (.cse11 (div |v_ULTIMATE.start_upsweep_~space~0#1_174| 2)) (.cse2 (<= 2 |v_ULTIMATE.start_upsweep_~n#1_87|)) (.cse5 (<= 2 |c_ULTIMATE.start_main_~n~0#1|)) (.cse12 (= (mod |v_ULTIMATE.start_upsweep_~space~0#1_174| 2) 0)) (.cse1 (<= 1 |c_#StackHeapBarrier|)) (.cse3 (<= |c_ULTIMATE.start_main_~n~0#1| 1073741823)) (.cse8 (<= 0 |c_ULTIMATE.start_main_~n~0#1|)) (.cse4 (= |c_ULTIMATE.start_main_~a0~0#1.offset| 0)) (.cse9 (= |v_ULTIMATE.start_upsweep_~space~0#1_174| 1)) (.cse6 (= |c_ULTIMATE.start_main_~a~0#1.offset| 0)) (.cse7 (= |v_ULTIMATE.start_upsweep_~a#1.offset_75| 0))) (and (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7) (and (<= 0 |v_ULTIMATE.start_upsweep_~n#1_87|) .cse0 .cse1 .cse3 .cse8 .cse4 .cse9 .cse6 .cse7)) (<= |v_ULTIMATE.start_upsweep_~n#1_87| |v_ULTIMATE.start_upsweep_~space~0#1_174|) (<= 0 (+ |v_ULTIMATE.start_upsweep_~space~0#1_174| 2147483648)) (let ((.cse10 (+ |v_ULTIMATE.start_upsweep_~space~0#1_174| 1))) (or (and (<= .cse10 0) (= |c_ULTIMATE.start_downsweep_~space#1| (+ .cse11 1)) (not .cse12)) (and (or (< 0 .cse10) .cse12) (= |c_ULTIMATE.start_downsweep_~space#1| .cse11)))) (or (and .cse0 (<= 1 .cse11) .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse12 .cse7) (and (= |v_ULTIMATE.start_upsweep_~a#1.base_75| |c_ULTIMATE.start_main_~a~0#1.base|) .cse1 .cse3 .cse8 .cse4 .cse9 .cse6 .cse7 (= |c_ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_upsweep_~n#1_87|))) (<= |v_ULTIMATE.start_upsweep_~space~0#1_174| 2147483647)))) (= |c_ULTIMATE.start_main_~a~0#1.offset| |c_ULTIMATE.start_downsweep_~a#1.offset|) (= |c_ULTIMATE.start_downsweep_~a#1.base| |c_ULTIMATE.start_main_~a~0#1.base|) (exists ((|v_#memory_int_739| (Array Int (Array Int Int)))) (= (store |v_#memory_int_739| |c_ULTIMATE.start_downsweep_~a#1.base| (store (select |v_#memory_int_739| |c_ULTIMATE.start_downsweep_~a#1.base|) (+ (* |c_ULTIMATE.start_downsweep_~n#1| 4) (- 4) |c_ULTIMATE.start_downsweep_~a#1.offset|) 0)) |c_#memory_int|)) (= |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_downsweep_~n#1|))) is different from true [2024-11-09 07:34:06,967 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16662#(and (<= (+ |ULTIMATE.start_check_~i~0#1| 1) |ULTIMATE.start_check_~n#1|) (<= 0 |ULTIMATE.start_check_~i~0#1|) (not (= |ULTIMATE.start_check_~sum~0#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4))))))' at error location [2024-11-09 07:34:06,968 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:34:06,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 07:34:06,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 39] total 71 [2024-11-09 07:34:06,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505420336] [2024-11-09 07:34:06,968 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 07:34:06,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-11-09 07:34:06,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:34:06,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-11-09 07:34:06,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=655, Invalid=16891, Unknown=22, NotChecked=792, Total=18360 [2024-11-09 07:34:06,977 INFO L87 Difference]: Start difference. First operand 254 states and 304 transitions. Second operand has 71 states, 66 states have (on average 1.8484848484848484) internal successors, (122), 67 states have internal predecessors, (122), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-09 07:34:38,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:34:38,747 INFO L93 Difference]: Finished difference Result 303 states and 359 transitions. [2024-11-09 07:34:38,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-09 07:34:38,748 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 66 states have (on average 1.8484848484848484) internal successors, (122), 67 states have internal predecessors, (122), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 77 [2024-11-09 07:34:38,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:34:38,749 INFO L225 Difference]: With dead ends: 303 [2024-11-09 07:34:38,749 INFO L226 Difference]: Without dead ends: 249 [2024-11-09 07:34:38,751 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 179 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 8740 ImplicationChecksByTransitivity, 121.1s TimeCoverageRelationStatistics Valid=1558, Invalid=29938, Unknown=22, NotChecked=1062, Total=32580 [2024-11-09 07:34:38,751 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 217 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 3379 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 3466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 3379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2024-11-09 07:34:38,751 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 610 Invalid, 3466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 3379 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2024-11-09 07:34:38,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2024-11-09 07:34:38,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 210. [2024-11-09 07:34:38,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 196 states have (on average 1.153061224489796) internal successors, (226), 196 states have internal predecessors, (226), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-09 07:34:38,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 246 transitions. [2024-11-09 07:34:38,873 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 246 transitions. Word has length 77 [2024-11-09 07:34:38,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:34:38,873 INFO L471 AbstractCegarLoop]: Abstraction has 210 states and 246 transitions. [2024-11-09 07:34:38,873 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 66 states have (on average 1.8484848484848484) internal successors, (122), 67 states have internal predecessors, (122), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-09 07:34:38,874 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 246 transitions. [2024-11-09 07:34:38,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-09 07:34:38,875 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:34:38,875 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:34:38,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-09 07:34:39,076 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2dd1980-2acb-4384-bddc-f19340a96b4c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-09 07:34:39,076 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:34:39,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:34:39,077 INFO L85 PathProgramCache]: Analyzing trace with hash -121044431, now seen corresponding path program 9 times [2024-11-09 07:34:39,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:34:39,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130297115] [2024-11-09 07:34:39,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:34:39,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:34:39,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat