./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/insertion_sort-1-2.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_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/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_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/insertion_sort-1-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/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_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/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 36d1103e69366c6d9110aa7e24b0c4765120510facc121d7623fcf9373a67e96 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 07:14:04,720 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 07:14:04,781 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 07:14:04,789 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 07:14:04,789 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 07:14:04,831 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 07:14:04,833 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 07:14:04,834 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 07:14:04,835 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 07:14:04,836 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 07:14:04,836 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 07:14:04,837 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 07:14:04,837 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 07:14:04,838 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 07:14:04,840 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 07:14:04,840 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 07:14:04,841 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 07:14:04,842 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 07:14:04,842 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 07:14:04,842 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 07:14:04,843 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 07:14:04,848 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 07:14:04,848 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 07:14:04,861 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 07:14:04,861 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 07:14:04,862 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 07:14:04,862 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 07:14:04,862 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 07:14:04,862 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 07:14:04,863 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 07:14:04,863 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 07:14:04,863 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 07:14:04,865 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 07:14:04,866 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 07:14:04,866 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 07:14:04,867 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 07:14:04,868 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 07:14:04,868 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 07:14:04,868 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 07:14:04,869 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 07:14:04,869 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 07:14:04,870 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 07:14:04,870 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 07:14:04,870 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 07:14:04,870 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 07:14:04,870 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 07:14:04,871 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 07:14:04,871 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_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 36d1103e69366c6d9110aa7e24b0c4765120510facc121d7623fcf9373a67e96 [2024-11-09 07:14:05,210 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 07:14:05,269 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 07:14:05,272 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 07:14:05,275 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 07:14:05,276 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 07:14:05,278 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/loops/insertion_sort-1-2.c Unable to find full path for "g++" [2024-11-09 07:14:07,536 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 07:14:07,744 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 07:14:07,745 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/sv-benchmarks/c/loops/insertion_sort-1-2.c [2024-11-09 07:14:07,754 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/data/6e1b07504/0b8d50cec75e4690a52bb343a60839a6/FLAGa2e32dced [2024-11-09 07:14:07,773 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/data/6e1b07504/0b8d50cec75e4690a52bb343a60839a6 [2024-11-09 07:14:07,775 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 07:14:07,777 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 07:14:07,779 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 07:14:07,780 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 07:14:07,787 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 07:14:07,788 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 07:14:07" (1/1) ... [2024-11-09 07:14:07,789 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fdfaa4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:14:07, skipping insertion in model container [2024-11-09 07:14:07,790 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 07:14:07" (1/1) ... [2024-11-09 07:14:07,814 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 07:14:08,024 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_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/sv-benchmarks/c/loops/insertion_sort-1-2.c[330,343] [2024-11-09 07:14:08,051 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 07:14:08,061 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 07:14:08,075 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_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/sv-benchmarks/c/loops/insertion_sort-1-2.c[330,343] [2024-11-09 07:14:08,085 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 07:14:08,107 INFO L204 MainTranslator]: Completed translation [2024-11-09 07:14:08,107 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:14:08 WrapperNode [2024-11-09 07:14:08,107 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 07:14:08,109 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 07:14:08,109 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 07:14:08,109 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 07:14:08,118 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:14:08" (1/1) ... [2024-11-09 07:14:08,126 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:14:08" (1/1) ... [2024-11-09 07:14:08,150 INFO L138 Inliner]: procedures = 15, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 79 [2024-11-09 07:14:08,150 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 07:14:08,151 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 07:14:08,152 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 07:14:08,152 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 07:14:08,162 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:14:08" (1/1) ... [2024-11-09 07:14:08,162 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:14:08" (1/1) ... [2024-11-09 07:14:08,164 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:14:08" (1/1) ... [2024-11-09 07:14:08,165 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:14:08" (1/1) ... [2024-11-09 07:14:08,170 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:14:08" (1/1) ... [2024-11-09 07:14:08,175 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:14:08" (1/1) ... [2024-11-09 07:14:08,176 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:14:08" (1/1) ... [2024-11-09 07:14:08,177 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:14:08" (1/1) ... [2024-11-09 07:14:08,180 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 07:14:08,181 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 07:14:08,181 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 07:14:08,181 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 07:14:08,182 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:14:08" (1/1) ... [2024-11-09 07:14:08,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 07:14:08,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:14:08,221 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 07:14:08,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 07:14:08,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 07:14:08,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 07:14:08,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 07:14:08,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 07:14:08,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 07:14:08,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 07:14:08,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 07:14:08,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 07:14:08,372 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 07:14:08,375 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 07:14:08,677 INFO L? ?]: Removed 21 outVars from TransFormulas that were not future-live. [2024-11-09 07:14:08,677 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 07:14:08,738 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 07:14:08,738 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-09 07:14:08,739 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:14:08 BoogieIcfgContainer [2024-11-09 07:14:08,739 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 07:14:08,743 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 07:14:08,743 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 07:14:08,747 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 07:14:08,748 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 07:14:07" (1/3) ... [2024-11-09 07:14:08,749 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@163d56cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 07:14:08, skipping insertion in model container [2024-11-09 07:14:08,749 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:14:08" (2/3) ... [2024-11-09 07:14:08,750 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@163d56cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 07:14:08, skipping insertion in model container [2024-11-09 07:14:08,750 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:14:08" (3/3) ... [2024-11-09 07:14:08,752 INFO L112 eAbstractionObserver]: Analyzing ICFG insertion_sort-1-2.c [2024-11-09 07:14:08,772 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 07:14:08,773 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 07:14:08,843 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 07:14:08,849 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;@35a28307, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 07:14:08,850 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 07:14:08,854 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:14:08,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-09 07:14:08,860 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:14:08,861 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:14:08,862 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:14:08,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:14:08,867 INFO L85 PathProgramCache]: Analyzing trace with hash 2083276732, now seen corresponding path program 1 times [2024-11-09 07:14:08,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:14:08,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594342823] [2024-11-09 07:14:08,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:14:08,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:14:09,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:14:09,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:14:09,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:14:09,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594342823] [2024-11-09 07:14:09,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594342823] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:14:09,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:14:09,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 07:14:09,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021191952] [2024-11-09 07:14:09,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:14:09,522 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 07:14:09,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:14:09,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 07:14:09,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 07:14:09,551 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:14:09,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:14:09,750 INFO L93 Difference]: Finished difference Result 42 states and 62 transitions. [2024-11-09 07:14:09,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 07:14:09,753 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-09 07:14:09,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:14:09,769 INFO L225 Difference]: With dead ends: 42 [2024-11-09 07:14:09,770 INFO L226 Difference]: Without dead ends: 22 [2024-11-09 07:14:09,774 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 07:14:09,781 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 5 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:14:09,782 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 42 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 07:14:09,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-09 07:14:09,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2024-11-09 07:14:09,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:14:09,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2024-11-09 07:14:09,858 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2024-11-09 07:14:09,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:14:09,859 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2024-11-09 07:14:09,859 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:14:09,860 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2024-11-09 07:14:09,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-09 07:14:09,861 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:14:09,861 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:14:09,881 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 07:14:09,881 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:14:09,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:14:09,883 INFO L85 PathProgramCache]: Analyzing trace with hash -2044338184, now seen corresponding path program 1 times [2024-11-09 07:14:09,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:14:09,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621951699] [2024-11-09 07:14:09,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:14:09,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:14:09,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:14:10,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:14:10,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:14:10,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621951699] [2024-11-09 07:14:10,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621951699] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:14:10,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:14:10,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 07:14:10,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943061526] [2024-11-09 07:14:10,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:14:10,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 07:14:10,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:14:10,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 07:14:10,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 07:14:10,301 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:14:10,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:14:10,419 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2024-11-09 07:14:10,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 07:14:10,421 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-09 07:14:10,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:14:10,422 INFO L225 Difference]: With dead ends: 36 [2024-11-09 07:14:10,422 INFO L226 Difference]: Without dead ends: 21 [2024-11-09 07:14:10,422 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 07:14:10,424 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:14:10,426 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 37 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:14:10,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-09 07:14:10,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-09 07:14:10,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:14:10,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2024-11-09 07:14:10,440 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 15 [2024-11-09 07:14:10,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:14:10,441 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2024-11-09 07:14:10,441 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:14:10,442 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2024-11-09 07:14:10,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-09 07:14:10,445 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:14:10,445 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:14:10,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 07:14:10,446 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:14:10,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:14:10,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1099297523, now seen corresponding path program 1 times [2024-11-09 07:14:10,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:14:10,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331954634] [2024-11-09 07:14:10,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:14:10,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:14:10,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:14:10,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:14:10,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:14:10,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331954634] [2024-11-09 07:14:10,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331954634] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:14:10,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467866536] [2024-11-09 07:14:10,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:14:10,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:14:10,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:14:10,792 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:14:10,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 07:14:10,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:14:10,903 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 07:14:10,911 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:14:11,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:14:11,008 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:14:11,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:14:11,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467866536] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:14:11,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [766351143] [2024-11-09 07:14:11,429 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 07:14:11,429 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:14:11,435 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:14:11,443 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:14:11,443 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:14:12,832 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:14:13,951 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '289#(and (= |ULTIMATE.start_main_~k~0#1| 1) (= |ULTIMATE.start_main_~#v~0#1.offset| 0) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) 4) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) 0)) (<= 2 (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296)) (exists ((|v_ULTIMATE.start_main_~j~0#1_35| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |v_ULTIMATE.start_main_~j~0#1_35|) (<= (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296) (mod |v_ULTIMATE.start_main_~j~0#1_35| 4294967296)) (<= 2 |ULTIMATE.start_main_~#v~0#1.base|))))' at error location [2024-11-09 07:14:13,951 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:14:13,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:14:13,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2024-11-09 07:14:13,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163848304] [2024-11-09 07:14:13,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:14:13,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 07:14:13,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:14:13,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 07:14:13,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2024-11-09 07:14:13,961 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:14:14,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:14:14,114 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2024-11-09 07:14:14,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 07:14:14,116 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-09 07:14:14,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:14:14,117 INFO L225 Difference]: With dead ends: 41 [2024-11-09 07:14:14,117 INFO L226 Difference]: Without dead ends: 26 [2024-11-09 07:14:14,118 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2024-11-09 07:14:14,121 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:14:14,122 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 41 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:14:14,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-09 07:14:14,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2024-11-09 07:14:14,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:14:14,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2024-11-09 07:14:14,133 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 17 [2024-11-09 07:14:14,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:14:14,134 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2024-11-09 07:14:14,134 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:14:14,134 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2024-11-09 07:14:14,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-09 07:14:14,135 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:14:14,135 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:14:14,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 07:14:14,335 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:14:14,336 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:14:14,337 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:14:14,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1523764434, now seen corresponding path program 2 times [2024-11-09 07:14:14,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:14:14,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407727179] [2024-11-09 07:14:14,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:14:14,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:14:14,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:14:15,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:14:15,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:14:15,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407727179] [2024-11-09 07:14:15,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407727179] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:14:15,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448317854] [2024-11-09 07:14:15,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:14:15,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:14:15,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:14:15,627 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:14:15,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 07:14:15,739 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 07:14:15,739 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:14:15,741 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-09 07:14:15,744 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:14:15,968 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 27 treesize of output 15 [2024-11-09 07:14:16,044 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:14:16,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-11-09 07:14:16,070 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 07:14:16,070 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:14:16,290 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 50 treesize of output 44 [2024-11-09 07:14:16,335 INFO L349 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2024-11-09 07:14:16,335 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 80 treesize of output 73 [2024-11-09 07:14:16,446 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 07:14:16,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448317854] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:14:16,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1377574472] [2024-11-09 07:14:16,452 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 07:14:16,452 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:14:16,453 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:14:16,454 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:14:16,455 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:14:17,430 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:14:18,796 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '513#(and (= |ULTIMATE.start_main_~k~0#1| 1) (exists ((|v_ULTIMATE.start_main_~j~0#1_46| Int)) (and (<= 1 |#StackHeapBarrier|) (<= (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296) (mod |v_ULTIMATE.start_main_~j~0#1_46| 4294967296)) (<= 2 |ULTIMATE.start_main_~#v~0#1.base|) (<= 1 |v_ULTIMATE.start_main_~j~0#1_46|))) (= |ULTIMATE.start_main_~#v~0#1.offset| 0) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) 4) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) 0)) (<= 2 (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296)))' at error location [2024-11-09 07:14:18,796 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:14:18,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:14:18,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 21 [2024-11-09 07:14:18,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630669078] [2024-11-09 07:14:18,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:14:18,798 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 07:14:18,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:14:18,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 07:14:18,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2024-11-09 07:14:18,801 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:14:19,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:14:19,308 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2024-11-09 07:14:19,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 07:14:19,309 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-09 07:14:19,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:14:19,310 INFO L225 Difference]: With dead ends: 50 [2024-11-09 07:14:19,311 INFO L226 Difference]: Without dead ends: 48 [2024-11-09 07:14:19,312 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=181, Invalid=1151, Unknown=0, NotChecked=0, Total=1332 [2024-11-09 07:14:19,313 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 07:14:19,313 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 93 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 07:14:19,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-09 07:14:19,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2024-11-09 07:14:19,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:14:19,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2024-11-09 07:14:19,321 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 19 [2024-11-09 07:14:19,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:14:19,321 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2024-11-09 07:14:19,321 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:14:19,322 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2024-11-09 07:14:19,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-09 07:14:19,322 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:14:19,323 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:14:19,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-09 07:14:19,527 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:14:19,528 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:14:19,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:14:19,528 INFO L85 PathProgramCache]: Analyzing trace with hash 551444438, now seen corresponding path program 1 times [2024-11-09 07:14:19,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:14:19,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700027302] [2024-11-09 07:14:19,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:14:19,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:14:19,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:14:19,924 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 07:14:19,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:14:19,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700027302] [2024-11-09 07:14:19,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700027302] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:14:19,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531574930] [2024-11-09 07:14:19,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:14:19,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:14:19,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:14:19,928 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:14:19,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 07:14:20,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:14:20,020 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 07:14:20,022 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:14:20,161 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 07:14:20,161 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:14:20,469 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 07:14:20,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531574930] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:14:20,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [547412679] [2024-11-09 07:14:20,472 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 07:14:20,473 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:14:20,473 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:14:20,473 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:14:20,474 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:14:21,308 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:14:22,381 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '787#(and (= |ULTIMATE.start_main_~#v~0#1.offset| 0) (<= (+ (mod |ULTIMATE.start_main_~k~0#1| 4294967296) 1) (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296)) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (* |ULTIMATE.start_main_~k~0#1| 4)) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (- 4)))) (<= 1 |ULTIMATE.start_main_~k~0#1|))' at error location [2024-11-09 07:14:22,382 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:14:22,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:14:22,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2024-11-09 07:14:22,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912080824] [2024-11-09 07:14:22,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:14:22,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 07:14:22,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:14:22,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 07:14:22,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2024-11-09 07:14:22,385 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:14:22,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:14:22,701 INFO L93 Difference]: Finished difference Result 98 states and 128 transitions. [2024-11-09 07:14:22,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 07:14:22,703 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-11-09 07:14:22,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:14:22,704 INFO L225 Difference]: With dead ends: 98 [2024-11-09 07:14:22,706 INFO L226 Difference]: Without dead ends: 69 [2024-11-09 07:14:22,707 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2024-11-09 07:14:22,708 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 29 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:14:22,710 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 55 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 07:14:22,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-09 07:14:22,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2024-11-09 07:14:22,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.2833333333333334) internal successors, (77), 60 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:14:22,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2024-11-09 07:14:22,735 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 23 [2024-11-09 07:14:22,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:14:22,735 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2024-11-09 07:14:22,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:14:22,736 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2024-11-09 07:14:22,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-09 07:14:22,737 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:14:22,737 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:14:22,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 07:14:22,937 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:14:22,938 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:14:22,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:14:22,938 INFO L85 PathProgramCache]: Analyzing trace with hash -59473624, now seen corresponding path program 1 times [2024-11-09 07:14:22,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:14:22,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757867292] [2024-11-09 07:14:22,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:14:22,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:14:22,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:14:23,118 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:14:23,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:14:23,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757867292] [2024-11-09 07:14:23,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757867292] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:14:23,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463612841] [2024-11-09 07:14:23,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:14:23,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:14:23,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:14:23,122 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:14:23,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 07:14:23,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:14:23,215 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 07:14:23,218 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:14:23,259 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:14:23,259 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:14:23,306 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:14:23,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463612841] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:14:23,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1753084176] [2024-11-09 07:14:23,309 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 07:14:23,309 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:14:23,310 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:14:23,310 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:14:23,310 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:14:24,613 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:14:25,393 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1159#(and (= |ULTIMATE.start_main_~k~0#1| 1) (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~j~0#1_74| Int)) (<= (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296) (mod |v_ULTIMATE.start_main_~j~0#1_74| 4294967296))) (= |ULTIMATE.start_main_~#v~0#1.offset| 0) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) 4) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) 0)) (<= 2 |ULTIMATE.start_main_~#v~0#1.base|) (<= 2 (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296)))' at error location [2024-11-09 07:14:25,393 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:14:25,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:14:25,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2024-11-09 07:14:25,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498765974] [2024-11-09 07:14:25,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:14:25,396 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 07:14:25,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:14:25,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 07:14:25,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2024-11-09 07:14:25,397 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:14:25,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:14:25,507 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2024-11-09 07:14:25,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 07:14:25,508 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-11-09 07:14:25,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:14:25,509 INFO L225 Difference]: With dead ends: 74 [2024-11-09 07:14:25,509 INFO L226 Difference]: Without dead ends: 42 [2024-11-09 07:14:25,510 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 47 SyntacticMatches, 9 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2024-11-09 07:14:25,511 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 66 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 07:14:25,512 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 66 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:14:25,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-09 07:14:25,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2024-11-09 07:14:25,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.25) internal successors, (50), 40 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:14:25,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2024-11-09 07:14:25,519 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 23 [2024-11-09 07:14:25,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:14:25,519 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2024-11-09 07:14:25,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:14:25,520 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2024-11-09 07:14:25,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-09 07:14:25,521 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:14:25,521 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:14:25,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 07:14:25,722 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:14:25,722 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:14:25,723 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:14:25,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1367025528, now seen corresponding path program 2 times [2024-11-09 07:14:25,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:14:25,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610779672] [2024-11-09 07:14:25,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:14:25,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:14:25,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:14:27,037 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 07:14:27,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:14:27,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610779672] [2024-11-09 07:14:27,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610779672] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:14:27,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979364535] [2024-11-09 07:14:27,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:14:27,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:14:27,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:14:27,043 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:14:27,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 07:14:27,153 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 07:14:27,153 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:14:27,155 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-09 07:14:27,160 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:14:27,315 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 27 treesize of output 15 [2024-11-09 07:14:27,366 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:14:27,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-11-09 07:14:27,389 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 07:14:27,389 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:14:27,581 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 50 treesize of output 44 [2024-11-09 07:14:27,613 INFO L349 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2024-11-09 07:14:27,613 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 80 treesize of output 73 [2024-11-09 07:14:27,769 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 07:14:27,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979364535] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:14:27,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2071578664] [2024-11-09 07:14:27,772 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 07:14:27,773 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:14:27,773 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:14:27,773 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:14:27,774 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:14:28,982 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:14:30,329 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1511#(and (= |ULTIMATE.start_main_~k~0#1| 1) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#v~0#1.offset| 0) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) 4) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) 0)) (<= 2 |ULTIMATE.start_main_~#v~0#1.base|) (<= 2 (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296)) (exists ((|v_ULTIMATE.start_main_~j~0#1_87| Int)) (<= (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296) (mod |v_ULTIMATE.start_main_~j~0#1_87| 4294967296))))' at error location [2024-11-09 07:14:30,329 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:14:30,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:14:30,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 23 [2024-11-09 07:14:30,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560446261] [2024-11-09 07:14:30,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:14:30,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-09 07:14:30,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:14:30,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-09 07:14:30,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2024-11-09 07:14:30,332 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:14:31,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:14:31,099 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2024-11-09 07:14:31,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 07:14:31,100 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-11-09 07:14:31,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:14:31,102 INFO L225 Difference]: With dead ends: 72 [2024-11-09 07:14:31,102 INFO L226 Difference]: Without dead ends: 70 [2024-11-09 07:14:31,103 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 56 SyntacticMatches, 8 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=259, Invalid=1811, Unknown=0, NotChecked=0, Total=2070 [2024-11-09 07:14:31,104 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 95 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 07:14:31,105 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 124 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 07:14:31,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-09 07:14:31,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 45. [2024-11-09 07:14:31,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 44 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:14:31,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2024-11-09 07:14:31,117 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 28 [2024-11-09 07:14:31,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:14:31,117 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2024-11-09 07:14:31,118 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:14:31,118 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2024-11-09 07:14:31,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-09 07:14:31,119 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:14:31,119 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:14:31,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 07:14:31,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-09 07:14:31,322 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:14:31,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:14:31,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1083001171, now seen corresponding path program 2 times [2024-11-09 07:14:31,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:14:31,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121212083] [2024-11-09 07:14:31,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:14:31,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:14:31,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:14:32,896 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:14:32,897 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:14:32,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121212083] [2024-11-09 07:14:32,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121212083] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:14:32,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915167533] [2024-11-09 07:14:32,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:14:32,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:14:32,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:14:32,900 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:14:32,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 07:14:33,011 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 07:14:33,011 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:14:33,013 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 07:14:33,016 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:14:33,270 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 27 treesize of output 15 [2024-11-09 07:14:33,435 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:14:33,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-11-09 07:14:33,463 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 07:14:33,463 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:14:33,703 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 52 treesize of output 46 [2024-11-09 07:14:33,732 INFO L349 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2024-11-09 07:14:33,733 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 76 treesize of output 65 [2024-11-09 07:14:33,795 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 07:14:33,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915167533] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:14:33,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1112905446] [2024-11-09 07:14:33,800 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 07:14:33,801 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:14:33,801 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:14:33,801 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:14:33,802 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:14:34,535 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:14:35,606 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1901#(and (= |ULTIMATE.start_main_~#v~0#1.offset| 0) (<= (+ (mod |ULTIMATE.start_main_~k~0#1| 4294967296) 1) (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296)) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (* |ULTIMATE.start_main_~k~0#1| 4)) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (- 4)))) (<= 1 |ULTIMATE.start_main_~k~0#1|))' at error location [2024-11-09 07:14:35,607 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:14:35,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:14:35,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 26 [2024-11-09 07:14:35,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275964096] [2024-11-09 07:14:35,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:14:35,608 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-09 07:14:35,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:14:35,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-09 07:14:35,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1326, Unknown=0, NotChecked=0, Total=1482 [2024-11-09 07:14:35,610 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:14:36,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:14:36,155 INFO L93 Difference]: Finished difference Result 76 states and 92 transitions. [2024-11-09 07:14:36,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-09 07:14:36,156 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-11-09 07:14:36,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:14:36,157 INFO L225 Difference]: With dead ends: 76 [2024-11-09 07:14:36,158 INFO L226 Difference]: Without dead ends: 74 [2024-11-09 07:14:36,159 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 61 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=224, Invalid=1938, Unknown=0, NotChecked=0, Total=2162 [2024-11-09 07:14:36,160 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 67 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 07:14:36,160 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 172 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 07:14:36,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-09 07:14:36,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 55. [2024-11-09 07:14:36,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 54 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:14:36,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2024-11-09 07:14:36,170 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 30 [2024-11-09 07:14:36,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:14:36,170 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2024-11-09 07:14:36,170 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:14:36,171 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2024-11-09 07:14:36,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-09 07:14:36,172 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:14:36,172 INFO L215 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:14:36,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 07:14:36,372 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-09 07:14:36,373 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:14:36,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:14:36,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1671042686, now seen corresponding path program 3 times [2024-11-09 07:14:36,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:14:36,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924816661] [2024-11-09 07:14:36,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:14:36,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:14:36,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:14:36,577 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 07:14:36,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:14:36,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924816661] [2024-11-09 07:14:36,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924816661] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:14:36,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757043755] [2024-11-09 07:14:36,578 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 07:14:36,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:14:36,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:14:36,580 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:14:36,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 07:14:36,695 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 07:14:36,695 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:14:36,697 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 07:14:36,699 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:14:36,733 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 07:14:36,733 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:14:36,784 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 07:14:36,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757043755] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:14:36,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [618536757] [2024-11-09 07:14:36,786 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 07:14:36,788 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:14:36,788 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:14:36,788 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:14:36,788 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:14:37,679 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:14:38,293 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2298#(and (= |ULTIMATE.start_main_~k~0#1| 1) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#v~0#1.offset| 0) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) 4) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) 0)) (<= 2 |ULTIMATE.start_main_~#v~0#1.base|) (exists ((|v_ULTIMATE.start_main_~j~0#1_113| Int)) (<= (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296) (mod |v_ULTIMATE.start_main_~j~0#1_113| 4294967296))) (<= 2 (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296)))' at error location [2024-11-09 07:14:38,293 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:14:38,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:14:38,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-11-09 07:14:38,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129518913] [2024-11-09 07:14:38,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:14:38,295 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 07:14:38,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:14:38,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 07:14:38,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2024-11-09 07:14:38,296 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:14:38,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:14:38,472 INFO L93 Difference]: Finished difference Result 73 states and 91 transitions. [2024-11-09 07:14:38,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 07:14:38,473 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-11-09 07:14:38,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:14:38,474 INFO L225 Difference]: With dead ends: 73 [2024-11-09 07:14:38,474 INFO L226 Difference]: Without dead ends: 61 [2024-11-09 07:14:38,474 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 70 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2024-11-09 07:14:38,475 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 15 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:14:38,476 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 83 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:14:38,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-09 07:14:38,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2024-11-09 07:14:38,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 56 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:14:38,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2024-11-09 07:14:38,491 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 32 [2024-11-09 07:14:38,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:14:38,491 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2024-11-09 07:14:38,491 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:14:38,492 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2024-11-09 07:14:38,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-09 07:14:38,493 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:14:38,493 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:14:38,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 07:14:38,696 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-09 07:14:38,697 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:14:38,697 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:14:38,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1087131590, now seen corresponding path program 4 times [2024-11-09 07:14:38,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:14:38,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88298838] [2024-11-09 07:14:38,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:14:38,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:14:38,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:14:39,025 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 07:14:39,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:14:39,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88298838] [2024-11-09 07:14:39,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88298838] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:14:39,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381579193] [2024-11-09 07:14:39,027 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 07:14:39,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:14:39,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:14:39,029 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:14:39,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 07:14:39,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:14:39,146 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 07:14:39,148 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:14:39,304 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 07:14:39,305 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:14:39,593 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 07:14:39,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381579193] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:14:39,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1019109792] [2024-11-09 07:14:39,598 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 07:14:39,598 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:14:39,599 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:14:39,599 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:14:39,599 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:14:40,552 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:14:41,442 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2705#(and (= |ULTIMATE.start_main_~k~0#1| 1) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#v~0#1.offset| 0) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) 4) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) 0)) (<= 2 |ULTIMATE.start_main_~#v~0#1.base|) (<= 2 (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296)) (exists ((|v_ULTIMATE.start_main_~j~0#1_136| Int)) (<= (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296) (mod |v_ULTIMATE.start_main_~j~0#1_136| 4294967296))))' at error location [2024-11-09 07:14:41,443 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:14:41,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:14:41,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2024-11-09 07:14:41,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465686680] [2024-11-09 07:14:41,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:14:41,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 07:14:41,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:14:41,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 07:14:41,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2024-11-09 07:14:41,445 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:14:41,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:14:41,706 INFO L93 Difference]: Finished difference Result 140 states and 177 transitions. [2024-11-09 07:14:41,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 07:14:41,706 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2024-11-09 07:14:41,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:14:41,707 INFO L225 Difference]: With dead ends: 140 [2024-11-09 07:14:41,707 INFO L226 Difference]: Without dead ends: 109 [2024-11-09 07:14:41,708 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 70 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2024-11-09 07:14:41,708 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 55 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:14:41,709 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 87 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 07:14:41,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-11-09 07:14:41,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 79. [2024-11-09 07:14:41,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.2564102564102564) internal successors, (98), 78 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:14:41,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 98 transitions. [2024-11-09 07:14:41,722 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 98 transitions. Word has length 33 [2024-11-09 07:14:41,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:14:41,722 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 98 transitions. [2024-11-09 07:14:41,723 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:14:41,723 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 98 transitions. [2024-11-09 07:14:41,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-09 07:14:41,724 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:14:41,724 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:14:41,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 07:14:41,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 07:14:41,928 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:14:41,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:14:41,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1145887611, now seen corresponding path program 3 times [2024-11-09 07:14:41,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:14:41,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388965684] [2024-11-09 07:14:41,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:14:41,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:14:41,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:14:42,436 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 07:14:42,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:14:42,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388965684] [2024-11-09 07:14:42,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388965684] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:14:42,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526213670] [2024-11-09 07:14:42,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 07:14:42,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:14:42,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:14:42,439 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:14:42,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 07:14:42,553 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 07:14:42,553 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:14:42,555 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 07:14:42,556 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:14:42,923 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 07:14:42,924 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:14:43,286 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 07:14:43,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526213670] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:14:43,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [108494733] [2024-11-09 07:14:43,289 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 07:14:43,289 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:14:43,290 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:14:43,290 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:14:43,290 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:14:43,893 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:14:45,005 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3232#(and (= |ULTIMATE.start_main_~#v~0#1.offset| 0) (<= (+ (mod |ULTIMATE.start_main_~k~0#1| 4294967296) 1) (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296)) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (* |ULTIMATE.start_main_~k~0#1| 4)) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (- 4)))) (<= 1 |ULTIMATE.start_main_~k~0#1|))' at error location [2024-11-09 07:14:45,006 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:14:45,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:14:45,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2024-11-09 07:14:45,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737499137] [2024-11-09 07:14:45,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:14:45,007 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-09 07:14:45,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:14:45,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-09 07:14:45,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2024-11-09 07:14:45,008 INFO L87 Difference]: Start difference. First operand 79 states and 98 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:14:45,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:14:45,610 INFO L93 Difference]: Finished difference Result 120 states and 146 transitions. [2024-11-09 07:14:45,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 07:14:45,611 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-11-09 07:14:45,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:14:45,612 INFO L225 Difference]: With dead ends: 120 [2024-11-09 07:14:45,612 INFO L226 Difference]: Without dead ends: 102 [2024-11-09 07:14:45,613 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 72 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=160, Invalid=1246, Unknown=0, NotChecked=0, Total=1406 [2024-11-09 07:14:45,614 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 82 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 07:14:45,614 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 110 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 07:14:45,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-09 07:14:45,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 91. [2024-11-09 07:14:45,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.2222222222222223) internal successors, (110), 90 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:14:45,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 110 transitions. [2024-11-09 07:14:45,650 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 110 transitions. Word has length 34 [2024-11-09 07:14:45,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:14:45,650 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 110 transitions. [2024-11-09 07:14:45,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:14:45,651 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 110 transitions. [2024-11-09 07:14:45,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-09 07:14:45,654 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:14:45,654 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:14:45,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-09 07:14:45,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-09 07:14:45,855 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:14:45,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:14:45,855 INFO L85 PathProgramCache]: Analyzing trace with hash 980288461, now seen corresponding path program 1 times [2024-11-09 07:14:45,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:14:45,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720323137] [2024-11-09 07:14:45,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:14:45,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:14:45,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:14:48,648 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:14:48,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:14:48,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720323137] [2024-11-09 07:14:48,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720323137] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:14:48,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238306298] [2024-11-09 07:14:48,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:14:48,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:14:48,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:14:48,652 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:14:48,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 07:14:48,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:14:48,786 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-09 07:14:48,790 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:14:49,013 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 27 treesize of output 15 [2024-11-09 07:14:49,059 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:14:49,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 25 [2024-11-09 07:14:49,147 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:14:49,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 28 [2024-11-09 07:14:49,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:14:49,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:14:49,263 INFO L349 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2024-11-09 07:14:49,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 34 [2024-11-09 07:14:49,456 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:14:49,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-11-09 07:14:49,484 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 07:14:49,485 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:15:06,042 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse3 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#v~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#v~0#1.offset| 4) |c_ULTIMATE.start_main_~key~0#1|)) (.cse8 (* |c_ULTIMATE.start_main_~j~0#1| 4))) (let ((.cse1 (+ |c_ULTIMATE.start_main_~#v~0#1.offset| 4)) (.cse2 (+ |c_ULTIMATE.start_main_~#v~0#1.offset| 8)) (.cse6 (select .cse3 (+ |c_ULTIMATE.start_main_~#v~0#1.offset| (- 4) .cse8))) (.cse5 (+ |c_ULTIMATE.start_main_~#v~0#1.offset| .cse8))) (and (or (and (or (= |c_ULTIMATE.start_main_~j~0#1| 2) (forall ((v_subst_3 Int) (|v_ULTIMATE.start_main_~i~0#1_128| Int)) (or (let ((.cse0 (store .cse3 (+ (* |v_ULTIMATE.start_main_~i~0#1_128| 4) |c_ULTIMATE.start_main_~#v~0#1.offset| 4) v_subst_3))) (< (select .cse0 .cse1) (+ (select .cse0 .cse2) 1))) (< |c_ULTIMATE.start_main_~j~0#1| (+ 2 |v_ULTIMATE.start_main_~i~0#1_128|))))) (or (forall ((v_subst_2 Int) (|v_ULTIMATE.start_main_~i~0#1_128| Int)) (or (let ((.cse4 (store (store .cse3 .cse5 .cse6) (+ (* |v_ULTIMATE.start_main_~i~0#1_128| 4) |c_ULTIMATE.start_main_~#v~0#1.offset| 4) v_subst_2))) (< (select .cse4 .cse1) (+ (select .cse4 .cse2) 1))) (< |c_ULTIMATE.start_main_~j~0#1| (+ 2 |v_ULTIMATE.start_main_~i~0#1_128|)))) (< 2 |c_ULTIMATE.start_main_~j~0#1|))) (< |c_ULTIMATE.start_main_~j~0#1| 2)) (or (< 1 |c_ULTIMATE.start_main_~j~0#1|) (forall ((v_ArrVal_257 Int) (v_subst_1 Int) (|v_ULTIMATE.start_main_~i~0#1_128| Int)) (or (< |c_ULTIMATE.start_main_~j~0#1| (+ 2 |v_ULTIMATE.start_main_~i~0#1_128|)) (let ((.cse7 (store (store (store .cse3 (+ |c_ULTIMATE.start_main_~#v~0#1.offset| .cse8 4) v_ArrVal_257) .cse5 .cse6) (+ (* |v_ULTIMATE.start_main_~i~0#1_128| 4) |c_ULTIMATE.start_main_~#v~0#1.offset| 4) v_subst_1))) (< (select .cse7 .cse1) (+ (select .cse7 .cse2) 1))) (< v_ArrVal_257 (select .cse3 .cse5)))))))) is different from false [2024-11-09 07:15:06,576 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 330 treesize of output 306 [2024-11-09 07:15:06,796 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:15:06,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 174956 treesize of output 157090 [2024-11-09 07:15:41,517 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 17 refuted. 2 times theorem prover too weak. 9 trivial. 1 not checked. [2024-11-09 07:15:41,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238306298] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:15:41,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2049525008] [2024-11-09 07:15:41,521 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 07:15:41,521 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:15:41,521 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:15:41,521 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:15:41,522 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:15:42,474 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:15:44,836 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3772#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#v~0#1.offset| 0) (<= (+ (mod |ULTIMATE.start_main_~k~0#1| 4294967296) 1) (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296)) (<= 2 |ULTIMATE.start_main_~#v~0#1.base|) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (* |ULTIMATE.start_main_~k~0#1| 4)) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (- 4)))) (<= 1 |ULTIMATE.start_main_~k~0#1|))' at error location [2024-11-09 07:15:44,836 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:15:44,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:15:44,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 15] total 38 [2024-11-09 07:15:44,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776770446] [2024-11-09 07:15:44,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:15:44,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-09 07:15:44,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:15:44,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-09 07:15:44,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=2136, Unknown=6, NotChecked=94, Total=2450 [2024-11-09 07:15:44,839 INFO L87 Difference]: Start difference. First operand 91 states and 110 transitions. Second operand has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 38 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:15:47,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:15:47,132 INFO L93 Difference]: Finished difference Result 146 states and 172 transitions. [2024-11-09 07:15:47,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-09 07:15:47,132 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 38 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-11-09 07:15:47,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:15:47,134 INFO L225 Difference]: With dead ends: 146 [2024-11-09 07:15:47,134 INFO L226 Difference]: Without dead ends: 125 [2024-11-09 07:15:47,135 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 65 SyntacticMatches, 8 SemanticMatches, 58 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=326, Invalid=3094, Unknown=6, NotChecked=114, Total=3540 [2024-11-09 07:15:47,136 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 92 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-09 07:15:47,136 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 207 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 759 Invalid, 0 Unknown, 78 Unchecked, 1.5s Time] [2024-11-09 07:15:47,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-11-09 07:15:47,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 100. [2024-11-09 07:15:47,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.2121212121212122) internal successors, (120), 99 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:15:47,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 120 transitions. [2024-11-09 07:15:47,157 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 120 transitions. Word has length 34 [2024-11-09 07:15:47,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:15:47,157 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 120 transitions. [2024-11-09 07:15:47,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 38 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:15:47,158 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 120 transitions. [2024-11-09 07:15:47,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-09 07:15:47,159 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:15:47,159 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:15:47,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 07:15:47,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-09 07:15:47,364 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:15:47,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:15:47,364 INFO L85 PathProgramCache]: Analyzing trace with hash -2061911551, now seen corresponding path program 5 times [2024-11-09 07:15:47,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:15:47,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904482712] [2024-11-09 07:15:47,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:15:47,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:15:47,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:15:48,954 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:15:48,954 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:15:48,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904482712] [2024-11-09 07:15:48,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904482712] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:15:48,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832500913] [2024-11-09 07:15:48,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:15:48,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:15:48,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:15:48,958 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:15:48,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 07:15:49,113 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 07:15:49,114 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:15:49,116 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-09 07:15:49,120 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:15:49,378 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 27 treesize of output 15 [2024-11-09 07:15:49,590 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:15:49,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 18 [2024-11-09 07:15:49,876 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:15:49,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 18 [2024-11-09 07:15:49,940 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:15:49,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-11-09 07:15:49,991 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 07:15:49,991 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:15:50,278 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:15:50,279 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 56 treesize of output 44 [2024-11-09 07:15:54,946 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 52 treesize of output 46 [2024-11-09 07:15:54,975 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:15:54,976 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 79 treesize of output 77 [2024-11-09 07:15:55,171 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 07:15:55,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832500913] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:15:55,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1718465062] [2024-11-09 07:15:55,174 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 07:15:55,175 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:15:55,175 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:15:55,175 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:15:55,175 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:15:55,951 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:15:57,850 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4376#(and (= |ULTIMATE.start_main_~k~0#1| 1) (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~j~0#1_186| Int)) (<= (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296) (mod |v_ULTIMATE.start_main_~j~0#1_186| 4294967296))) (= |ULTIMATE.start_main_~#v~0#1.offset| 0) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) 4) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) 0)) (<= 2 |ULTIMATE.start_main_~#v~0#1.base|) (<= 2 (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296)))' at error location [2024-11-09 07:15:57,850 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:15:57,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:15:57,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 35 [2024-11-09 07:15:57,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820788223] [2024-11-09 07:15:57,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:15:57,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-09 07:15:57,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:15:57,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-09 07:15:57,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1836, Unknown=2, NotChecked=0, Total=2070 [2024-11-09 07:15:57,853 INFO L87 Difference]: Start difference. First operand 100 states and 120 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:16:43,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:16:43,902 INFO L93 Difference]: Finished difference Result 153 states and 185 transitions. [2024-11-09 07:16:43,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-09 07:16:43,902 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-11-09 07:16:43,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:16:43,904 INFO L225 Difference]: With dead ends: 153 [2024-11-09 07:16:43,904 INFO L226 Difference]: Without dead ends: 151 [2024-11-09 07:16:43,905 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 67 SyntacticMatches, 9 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1439 ImplicationChecksByTransitivity, 52.4s TimeCoverageRelationStatistics Valid=405, Invalid=2882, Unknown=19, NotChecked=0, Total=3306 [2024-11-09 07:16:43,906 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 156 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:16:43,906 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 198 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 07:16:43,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-11-09 07:16:43,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 117. [2024-11-09 07:16:43,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.25) internal successors, (145), 116 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:16:43,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 145 transitions. [2024-11-09 07:16:43,936 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 145 transitions. Word has length 35 [2024-11-09 07:16:43,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:16:43,936 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 145 transitions. [2024-11-09 07:16:43,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:16:43,937 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 145 transitions. [2024-11-09 07:16:43,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-09 07:16:43,939 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:16:43,939 INFO L215 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:16:43,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-09 07:16:44,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-09 07:16:44,140 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:16:44,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:16:44,141 INFO L85 PathProgramCache]: Analyzing trace with hash 811672848, now seen corresponding path program 2 times [2024-11-09 07:16:44,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:16:44,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161561141] [2024-11-09 07:16:44,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:16:44,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:16:44,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:16:46,633 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:16:46,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:16:46,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161561141] [2024-11-09 07:16:46,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161561141] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:16:46,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288107167] [2024-11-09 07:16:46,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:16:46,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:16:46,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:16:46,635 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:16:46,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 07:16:46,779 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 07:16:46,779 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:16:46,781 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-09 07:16:46,785 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:16:46,920 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 25 treesize of output 20 [2024-11-09 07:16:47,043 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:16:47,043 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 1 case distinctions, treesize of input 40 treesize of output 20 [2024-11-09 07:16:47,139 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:16:47,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2024-11-09 07:16:47,227 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:16:47,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 30 [2024-11-09 07:16:47,344 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:16:47,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 23 [2024-11-09 07:16:47,496 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:16:47,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2024-11-09 07:16:47,556 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 07:16:47,556 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:16:57,746 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 688 treesize of output 626 [2024-11-09 07:16:58,116 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:16:58,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 2460171 treesize of output 2215941 [2024-11-09 07:17:01,329 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 24 refuted. 4 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 07:17:01,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288107167] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:17:01,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [338624236] [2024-11-09 07:17:01,331 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 07:17:01,332 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:17:01,332 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:17:01,332 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:17:01,332 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:17:02,354 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:17:04,744 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5022#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#v~0#1.offset| 0) (<= (+ (mod |ULTIMATE.start_main_~k~0#1| 4294967296) 1) (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296)) (<= 2 |ULTIMATE.start_main_~#v~0#1.base|) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (* |ULTIMATE.start_main_~k~0#1| 4)) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (- 4)))) (<= 1 |ULTIMATE.start_main_~k~0#1|))' at error location [2024-11-09 07:17:04,744 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:17:04,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:17:04,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 14] total 35 [2024-11-09 07:17:04,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544849969] [2024-11-09 07:17:04,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:17:04,745 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-09 07:17:04,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:17:04,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-09 07:17:04,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1952, Unknown=4, NotChecked=0, Total=2162 [2024-11-09 07:17:04,747 INFO L87 Difference]: Start difference. First operand 117 states and 145 transitions. Second operand has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:17:08,200 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 [1] [2024-11-09 07:17:12,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 07:17:14,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 07:17:17,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 07:17:19,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 07:17:21,152 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 [1] [2024-11-09 07:17:22,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:17:22,394 INFO L93 Difference]: Finished difference Result 140 states and 169 transitions. [2024-11-09 07:17:22,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-09 07:17:22,395 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-11-09 07:17:22,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:17:22,396 INFO L225 Difference]: With dead ends: 140 [2024-11-09 07:17:22,396 INFO L226 Difference]: Without dead ends: 112 [2024-11-09 07:17:22,397 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 73 SyntacticMatches, 9 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1292 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=336, Invalid=3081, Unknown=5, NotChecked=0, Total=3422 [2024-11-09 07:17:22,398 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 67 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 6 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time [2024-11-09 07:17:22,398 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 322 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 969 Invalid, 6 Unknown, 0 Unchecked, 14.3s Time] [2024-11-09 07:17:22,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-11-09 07:17:22,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 74. [2024-11-09 07:17:22,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.273972602739726) internal successors, (93), 73 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:17:22,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 93 transitions. [2024-11-09 07:17:22,414 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 93 transitions. Word has length 36 [2024-11-09 07:17:22,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:17:22,414 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 93 transitions. [2024-11-09 07:17:22,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:17:22,415 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 93 transitions. [2024-11-09 07:17:22,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-09 07:17:22,416 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:17:22,416 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:17:22,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-09 07:17:22,619 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:17:22,620 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:17:22,620 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:17:22,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1766505175, now seen corresponding path program 3 times [2024-11-09 07:17:22,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:17:22,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716227465] [2024-11-09 07:17:22,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:17:22,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:17:22,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:17:24,305 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 07:17:24,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:17:24,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716227465] [2024-11-09 07:17:24,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716227465] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:17:24,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317259498] [2024-11-09 07:17:24,306 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 07:17:24,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:17:24,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:17:24,310 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:17:24,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 07:17:24,446 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 07:17:24,446 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:17:24,448 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-09 07:17:24,451 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:17:24,698 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 15 treesize of output 1 [2024-11-09 07:17:24,856 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 15 treesize of output 1 [2024-11-09 07:17:25,248 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 27 treesize of output 15 [2024-11-09 07:17:25,642 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:17:25,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-11-09 07:17:25,727 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:17:25,728 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:17:26,392 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2024-11-09 07:17:26,392 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 70 treesize of output 47 [2024-11-09 07:17:27,038 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 61 treesize of output 55 [2024-11-09 07:17:27,089 INFO L349 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2024-11-09 07:17:27,089 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 291 treesize of output 248 [2024-11-09 07:17:27,145 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 07:17:27,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317259498] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:17:27,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1108286398] [2024-11-09 07:17:27,148 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 07:17:27,148 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:17:27,148 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:17:27,148 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:17:27,149 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:17:28,051 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:17:30,398 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5613#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#v~0#1.offset| 0) (<= (+ (mod |ULTIMATE.start_main_~k~0#1| 4294967296) 1) (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296)) (<= 2 |ULTIMATE.start_main_~#v~0#1.base|) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (* |ULTIMATE.start_main_~k~0#1| 4)) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (- 4)))) (<= 1 |ULTIMATE.start_main_~k~0#1|))' at error location [2024-11-09 07:17:30,399 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:17:30,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:17:30,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 14] total 38 [2024-11-09 07:17:30,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570105401] [2024-11-09 07:17:30,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:17:30,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-09 07:17:30,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:17:30,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-09 07:17:30,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=2242, Unknown=0, NotChecked=0, Total=2450 [2024-11-09 07:17:30,401 INFO L87 Difference]: Start difference. First operand 74 states and 93 transitions. Second operand has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 38 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:17:48,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:17:48,770 INFO L93 Difference]: Finished difference Result 137 states and 167 transitions. [2024-11-09 07:17:48,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-09 07:17:48,771 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 38 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-11-09 07:17:48,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:17:48,771 INFO L225 Difference]: With dead ends: 137 [2024-11-09 07:17:48,772 INFO L226 Difference]: Without dead ends: 135 [2024-11-09 07:17:48,773 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 74 SyntacticMatches, 12 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1682 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=478, Invalid=4349, Unknown=3, NotChecked=0, Total=4830 [2024-11-09 07:17:48,773 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 212 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-09 07:17:48,774 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 198 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-09 07:17:48,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-11-09 07:17:48,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 81. [2024-11-09 07:17:48,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.2875) internal successors, (103), 80 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:17:48,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 103 transitions. [2024-11-09 07:17:48,790 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 103 transitions. Word has length 39 [2024-11-09 07:17:48,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:17:48,790 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 103 transitions. [2024-11-09 07:17:48,790 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 38 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:17:48,791 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 103 transitions. [2024-11-09 07:17:48,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-09 07:17:48,791 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:17:48,791 INFO L215 NwaCegarLoop]: trace histogram [6, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:17:48,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-09 07:17:48,992 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:17:48,992 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:17:48,992 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:17:48,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1917544059, now seen corresponding path program 6 times [2024-11-09 07:17:48,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:17:48,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238619867] [2024-11-09 07:17:48,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:17:48,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:17:49,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:17:50,203 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:17:50,203 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:17:50,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238619867] [2024-11-09 07:17:50,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238619867] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:17:50,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64881316] [2024-11-09 07:17:50,203 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 07:17:50,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:17:50,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:17:50,205 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:17:50,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 07:17:50,327 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 07:17:50,327 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:17:50,329 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-09 07:17:50,332 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:17:50,477 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 25 treesize of output 20 [2024-11-09 07:17:50,586 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:17:50,586 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 1 case distinctions, treesize of input 40 treesize of output 20 [2024-11-09 07:17:50,638 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:17:50,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2024-11-09 07:17:50,666 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 07:17:50,666 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:17:50,919 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 75 treesize of output 65 [2024-11-09 07:17:50,946 INFO L349 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2024-11-09 07:17:50,946 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 579 treesize of output 461 [2024-11-09 07:17:51,194 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 07:17:51,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64881316] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:17:51,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [527026312] [2024-11-09 07:17:51,196 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 07:17:51,196 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:17:51,197 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:17:51,197 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:17:51,197 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:17:51,820 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:17:53,931 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6212#(and (= |ULTIMATE.start_main_~k~0#1| 1) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#v~0#1.offset| 0) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) 4) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) 0)) (<= 2 |ULTIMATE.start_main_~#v~0#1.base|) (exists ((|v_ULTIMATE.start_main_~j~0#1_231| Int)) (<= (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296) (mod |v_ULTIMATE.start_main_~j~0#1_231| 4294967296))) (<= 2 (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296)))' at error location [2024-11-09 07:17:53,931 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:17:53,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:17:53,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 28 [2024-11-09 07:17:53,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980994584] [2024-11-09 07:17:53,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:17:53,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-09 07:17:53,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:17:53,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-09 07:17:53,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1339, Unknown=0, NotChecked=0, Total=1482 [2024-11-09 07:17:53,933 INFO L87 Difference]: Start difference. First operand 81 states and 103 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 28 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:17:57,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:17:57,776 INFO L93 Difference]: Finished difference Result 208 states and 266 transitions. [2024-11-09 07:17:57,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-09 07:17:57,777 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 28 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-11-09 07:17:57,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:17:57,778 INFO L225 Difference]: With dead ends: 208 [2024-11-09 07:17:57,779 INFO L226 Difference]: Without dead ends: 206 [2024-11-09 07:17:57,780 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 84 SyntacticMatches, 11 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1482 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=474, Invalid=4356, Unknown=0, NotChecked=0, Total=4830 [2024-11-09 07:17:57,781 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 156 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 1084 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-09 07:17:57,781 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 297 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1084 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-09 07:17:57,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2024-11-09 07:17:57,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 102. [2024-11-09 07:17:57,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.3366336633663367) internal successors, (135), 101 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:17:57,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 135 transitions. [2024-11-09 07:17:57,796 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 135 transitions. Word has length 39 [2024-11-09 07:17:57,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:17:57,796 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 135 transitions. [2024-11-09 07:17:57,796 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 28 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:17:57,796 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 135 transitions. [2024-11-09 07:17:57,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-09 07:17:57,797 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:17:57,797 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:17:57,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-09 07:17:57,997 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:17:57,998 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:17:57,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:17:57,998 INFO L85 PathProgramCache]: Analyzing trace with hash 919010868, now seen corresponding path program 4 times [2024-11-09 07:17:57,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:17:57,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307094034] [2024-11-09 07:17:57,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:17:57,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:17:58,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:17:59,851 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:17:59,851 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:17:59,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307094034] [2024-11-09 07:17:59,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307094034] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:17:59,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655529311] [2024-11-09 07:17:59,852 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 07:17:59,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:17:59,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:17:59,855 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:17:59,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 07:18:00,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:18:00,007 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-09 07:18:00,010 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:18:00,236 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 15 treesize of output 1 [2024-11-09 07:18:00,566 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 27 treesize of output 15 [2024-11-09 07:18:00,748 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:18:00,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-11-09 07:18:00,787 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 07:18:00,788 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:18:01,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-11-09 07:18:01,488 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:18:01,489 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 60 treesize of output 44 [2024-11-09 07:18:01,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 63 [2024-11-09 07:18:01,555 INFO L349 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2024-11-09 07:18:01,555 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 481 treesize of output 422 [2024-11-09 07:18:01,897 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 07:18:01,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655529311] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:18:01,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [741035272] [2024-11-09 07:18:01,899 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 07:18:01,900 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:18:01,900 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:18:01,900 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:18:01,900 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:18:02,251 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:18:04,321 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6975#(and (= |ULTIMATE.start_main_~#v~0#1.offset| 0) (<= (+ (mod |ULTIMATE.start_main_~k~0#1| 4294967296) 1) (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296)) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (* |ULTIMATE.start_main_~k~0#1| 4)) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (- 4)))) (<= 1 |ULTIMATE.start_main_~k~0#1|))' at error location [2024-11-09 07:18:04,322 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:18:04,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:18:04,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 13] total 33 [2024-11-09 07:18:04,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500920298] [2024-11-09 07:18:04,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:18:04,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-09 07:18:04,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:18:04,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-09 07:18:04,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1872, Unknown=0, NotChecked=0, Total=2070 [2024-11-09 07:18:04,325 INFO L87 Difference]: Start difference. First operand 102 states and 135 transitions. Second operand has 33 states, 33 states have (on average 2.6666666666666665) internal successors, (88), 33 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:18:07,835 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (* |c_ULTIMATE.start_main_~i~0#1| 4)) (.cse3 (+ |c_ULTIMATE.start_main_~#v~0#1.offset| 8)) (.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#v~0#1.base|)) (.cse4 (+ |c_ULTIMATE.start_main_~#v~0#1.offset| 12))) (let ((.cse6 (< (select .cse0 .cse3) (+ (select .cse0 .cse4) 1))) (.cse5 (+ .cse1 |c_ULTIMATE.start_main_~#v~0#1.offset| 4))) (and (<= (select .cse0 8) (select .cse0 12)) (forall ((|ULTIMATE.start_main_~key~0#1| Int)) (or (< |ULTIMATE.start_main_~key~0#1| (select .cse0 (+ .cse1 |c_ULTIMATE.start_main_~#v~0#1.offset|))) (let ((.cse2 (store .cse0 .cse5 |ULTIMATE.start_main_~key~0#1|))) (< (select .cse2 .cse3) (+ (select .cse2 .cse4) 1))))) (or .cse6 (< 0 |c_ULTIMATE.start_main_~j~0#1|)) (or .cse6 (< 0 (+ |c_ULTIMATE.start_main_~i~0#1| 1))) (forall ((|ULTIMATE.start_main_~key~0#1| Int)) (let ((.cse7 (* |c_ULTIMATE.start_main_~j~0#1| 4))) (or (< |ULTIMATE.start_main_~key~0#1| (select .cse0 (+ |c_ULTIMATE.start_main_~#v~0#1.offset| (- 4) .cse7))) (let ((.cse8 (store .cse0 (+ |c_ULTIMATE.start_main_~#v~0#1.offset| .cse7) |ULTIMATE.start_main_~key~0#1|))) (< (select .cse8 .cse3) (+ (select .cse8 .cse4) 1)))))) (= |c_ULTIMATE.start_main_~#v~0#1.offset| 0) (not (= |c_ULTIMATE.start_main_~j~0#1| 2)) (let ((.cse9 (store .cse0 .cse5 |c_ULTIMATE.start_main_~key~0#1|))) (< (select .cse9 .cse3) (+ (select .cse9 .cse4) 1)))))) is different from false [2024-11-09 07:18:08,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:18:08,643 INFO L93 Difference]: Finished difference Result 239 states and 315 transitions. [2024-11-09 07:18:08,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-09 07:18:08,644 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.6666666666666665) internal successors, (88), 33 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-11-09 07:18:08,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:18:08,645 INFO L225 Difference]: With dead ends: 239 [2024-11-09 07:18:08,646 INFO L226 Difference]: Without dead ends: 237 [2024-11-09 07:18:08,647 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 92 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=284, Invalid=2799, Unknown=1, NotChecked=108, Total=3192 [2024-11-09 07:18:08,647 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 106 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-09 07:18:08,648 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 229 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 925 Invalid, 0 Unknown, 31 Unchecked, 1.6s Time] [2024-11-09 07:18:08,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2024-11-09 07:18:08,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 112. [2024-11-09 07:18:08,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.3333333333333333) internal successors, (148), 111 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:18:08,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 148 transitions. [2024-11-09 07:18:08,672 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 148 transitions. Word has length 41 [2024-11-09 07:18:08,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:18:08,672 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 148 transitions. [2024-11-09 07:18:08,673 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.6666666666666665) internal successors, (88), 33 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:18:08,673 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 148 transitions. [2024-11-09 07:18:08,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-09 07:18:08,673 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:18:08,673 INFO L215 NwaCegarLoop]: trace histogram [7, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:18:08,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-09 07:18:08,874 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 07:18:08,874 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:18:08,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:18:08,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1044536868, now seen corresponding path program 7 times [2024-11-09 07:18:08,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:18:08,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698980983] [2024-11-09 07:18:08,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:18:08,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:18:08,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:18:10,071 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 07:18:10,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:18:10,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698980983] [2024-11-09 07:18:10,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698980983] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:18:10,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924972692] [2024-11-09 07:18:10,071 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 07:18:10,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:18:10,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:18:10,073 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:18:10,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 07:18:10,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:18:10,203 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-09 07:18:10,205 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:18:10,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2024-11-09 07:18:10,795 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:18:10,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 10 [2024-11-09 07:18:10,839 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 07:18:10,839 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:18:11,174 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 50 treesize of output 44 [2024-11-09 07:18:11,239 INFO L349 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2024-11-09 07:18:11,240 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 80 treesize of output 73 [2024-11-09 07:18:11,378 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-09 07:18:11,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924972692] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:18:11,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [588399374] [2024-11-09 07:18:11,380 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 07:18:11,381 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:18:11,381 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:18:11,381 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:18:11,381 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:18:11,963 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:18:13,977 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7754#(and (= |ULTIMATE.start_main_~k~0#1| 1) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#v~0#1.offset| 0) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) 4) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) 0)) (exists ((|v_ULTIMATE.start_main_~j~0#1_264| Int)) (<= (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296) (mod |v_ULTIMATE.start_main_~j~0#1_264| 4294967296))) (<= 2 |ULTIMATE.start_main_~#v~0#1.base|) (<= 2 (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296)))' at error location [2024-11-09 07:18:13,978 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:18:13,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:18:13,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 13] total 31 [2024-11-09 07:18:13,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588063794] [2024-11-09 07:18:13,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:18:13,978 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-09 07:18:13,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:18:13,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-09 07:18:13,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1564, Unknown=0, NotChecked=0, Total=1722 [2024-11-09 07:18:13,980 INFO L87 Difference]: Start difference. First operand 112 states and 148 transitions. Second operand has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:18:16,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:18:16,088 INFO L93 Difference]: Finished difference Result 171 states and 218 transitions. [2024-11-09 07:18:16,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-09 07:18:16,089 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-11-09 07:18:16,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:18:16,090 INFO L225 Difference]: With dead ends: 171 [2024-11-09 07:18:16,090 INFO L226 Difference]: Without dead ends: 169 [2024-11-09 07:18:16,091 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 84 SyntacticMatches, 13 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1284 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=382, Invalid=3278, Unknown=0, NotChecked=0, Total=3660 [2024-11-09 07:18:16,091 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 87 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:18:16,092 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 231 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 07:18:16,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-11-09 07:18:16,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 117. [2024-11-09 07:18:16,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.3448275862068966) internal successors, (156), 116 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:18:16,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 156 transitions. [2024-11-09 07:18:16,122 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 156 transitions. Word has length 41 [2024-11-09 07:18:16,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:18:16,122 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 156 transitions. [2024-11-09 07:18:16,122 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:18:16,122 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 156 transitions. [2024-11-09 07:18:16,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-09 07:18:16,123 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:18:16,123 INFO L215 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:18:16,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-09 07:18:16,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 07:18:16,324 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:18:16,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:18:16,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1758183734, now seen corresponding path program 8 times [2024-11-09 07:18:16,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:18:16,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215704430] [2024-11-09 07:18:16,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:18:16,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:18:16,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:18:16,872 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 07:18:16,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:18:16,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215704430] [2024-11-09 07:18:16,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215704430] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:18:16,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100897459] [2024-11-09 07:18:16,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:18:16,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:18:16,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:18:16,875 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:18:16,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 07:18:17,135 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-09 07:18:17,135 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:18:17,136 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-09 07:18:17,137 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:18:17,474 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 25 proven. 37 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 07:18:17,474 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:18:18,267 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 25 proven. 37 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 07:18:18,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100897459] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:18:18,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [516494312] [2024-11-09 07:18:18,270 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 07:18:18,270 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:18:18,270 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:18:18,271 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:18:18,271 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:18:18,940 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:18:20,935 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8458#(and (= |ULTIMATE.start_main_~k~0#1| 1) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#v~0#1.offset| 0) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) 4) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) 0)) (<= 2 |ULTIMATE.start_main_~#v~0#1.base|) (<= 2 (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296)) (exists ((|v_ULTIMATE.start_main_~j~0#1_291| Int)) (<= (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296) (mod |v_ULTIMATE.start_main_~j~0#1_291| 4294967296))))' at error location [2024-11-09 07:18:20,935 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:18:20,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:18:20,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2024-11-09 07:18:20,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207340412] [2024-11-09 07:18:20,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:18:20,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 07:18:20,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:18:20,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 07:18:20,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2024-11-09 07:18:20,938 INFO L87 Difference]: Start difference. First operand 117 states and 156 transitions. Second operand has 21 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:18:21,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:18:21,769 INFO L93 Difference]: Finished difference Result 314 states and 426 transitions. [2024-11-09 07:18:21,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 07:18:21,770 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2024-11-09 07:18:21,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:18:21,772 INFO L225 Difference]: With dead ends: 314 [2024-11-09 07:18:21,772 INFO L226 Difference]: Without dead ends: 245 [2024-11-09 07:18:21,773 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 91 SyntacticMatches, 15 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2024-11-09 07:18:21,774 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 07:18:21,774 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 119 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 07:18:21,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2024-11-09 07:18:21,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 158. [2024-11-09 07:18:21,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.3248407643312101) internal successors, (208), 157 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:18:21,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 208 transitions. [2024-11-09 07:18:21,813 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 208 transitions. Word has length 42 [2024-11-09 07:18:21,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:18:21,813 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 208 transitions. [2024-11-09 07:18:21,813 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:18:21,814 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 208 transitions. [2024-11-09 07:18:21,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-09 07:18:21,814 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:18:21,814 INFO L215 NwaCegarLoop]: trace histogram [6, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:18:21,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-09 07:18:22,015 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:18:22,015 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:18:22,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:18:22,016 INFO L85 PathProgramCache]: Analyzing trace with hash 31990947, now seen corresponding path program 4 times [2024-11-09 07:18:22,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:18:22,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50867312] [2024-11-09 07:18:22,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:18:22,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:18:22,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:18:24,968 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:18:24,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:18:24,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50867312] [2024-11-09 07:18:24,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50867312] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:18:24,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787335222] [2024-11-09 07:18:24,969 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 07:18:24,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:18:24,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:18:24,972 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:18:24,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-09 07:18:25,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:18:25,136 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-09 07:18:25,140 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:18:25,341 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 27 treesize of output 15 [2024-11-09 07:18:25,426 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:18:25,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 18 [2024-11-09 07:18:25,535 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:18:25,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 25 [2024-11-09 07:18:25,672 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:18:25,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 28 [2024-11-09 07:18:25,796 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:18:25,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 21 [2024-11-09 07:18:26,056 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:18:26,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-11-09 07:18:26,129 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:18:26,130 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:18:27,465 INFO L349 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2024-11-09 07:18:27,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1992 treesize of output 1661 [2024-11-09 07:18:32,154 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse11 (* |c_ULTIMATE.start_main_~j~0#1| 4))) (let ((.cse1 (+ |c_ULTIMATE.start_main_~#v~0#1.offset| 4)) (.cse3 (+ |c_ULTIMATE.start_main_~#v~0#1.offset| 8)) (.cse8 (+ |c_ULTIMATE.start_main_~#v~0#1.offset| (- 4) .cse11)) (.cse2 (+ |c_ULTIMATE.start_main_~#v~0#1.offset| .cse11 (- 8))) (.cse4 (select |c_#memory_int| |c_ULTIMATE.start_main_~#v~0#1.base|)) (.cse5 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#v~0#1.offset| 4))) (and (or (= |c_ULTIMATE.start_main_~j~0#1| 2) (and (or (forall ((|ULTIMATE.start_main_~key~0#1| Int) (v_subst_12 Int)) (let ((.cse0 (store .cse4 .cse5 |ULTIMATE.start_main_~key~0#1|))) (< (select .cse0 .cse1) (+ (select (store .cse0 .cse2 v_subst_12) .cse3) 1)))) (= |c_ULTIMATE.start_main_~j~0#1| 3)) (or (forall ((|ULTIMATE.start_main_~key~0#1| Int) (v_subst_13 Int) (v_ArrVal_603 Int)) (let ((.cse6 (store .cse4 .cse5 |ULTIMATE.start_main_~key~0#1|))) (or (< (select .cse6 .cse2) v_ArrVal_603) (let ((.cse7 (store (store .cse6 .cse8 v_ArrVal_603) .cse2 v_subst_13))) (< (select .cse7 .cse1) (+ (select .cse7 .cse3) 1)))))) (< 3 |c_ULTIMATE.start_main_~j~0#1|)))) (or (forall ((|ULTIMATE.start_main_~key~0#1| Int) (v_subst_14 Int) (v_ArrVal_603 Int)) (let ((.cse10 (store .cse4 .cse5 |ULTIMATE.start_main_~key~0#1|))) (or (let ((.cse9 (store (store (store .cse10 (+ |c_ULTIMATE.start_main_~#v~0#1.offset| .cse11) (select .cse10 .cse8)) .cse8 v_ArrVal_603) .cse2 v_subst_14))) (< (select .cse9 .cse1) (+ (select .cse9 .cse3) 1))) (< (select .cse10 .cse2) v_ArrVal_603)))) (< 2 |c_ULTIMATE.start_main_~j~0#1|)) (<= 2 |c_ULTIMATE.start_main_~j~0#1|)))) is different from false [2024-11-09 07:18:33,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 319 treesize of output 297 [2024-11-09 07:18:33,592 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:18:33,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 755273 treesize of output 707895 [2024-11-09 07:18:34,952 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 16 trivial. 12 not checked. [2024-11-09 07:18:34,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787335222] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:18:34,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1310906777] [2024-11-09 07:18:34,954 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 07:18:34,954 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:18:34,954 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:18:34,954 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:18:34,954 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:18:35,472 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:18:38,319 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9413#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#v~0#1.offset| 0) (<= (+ (mod |ULTIMATE.start_main_~k~0#1| 4294967296) 1) (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296)) (<= 2 |ULTIMATE.start_main_~#v~0#1.base|) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (* |ULTIMATE.start_main_~k~0#1| 4)) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (- 4)))) (<= 1 |ULTIMATE.start_main_~k~0#1|))' at error location [2024-11-09 07:18:38,319 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:18:38,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:18:38,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 18] total 42 [2024-11-09 07:18:38,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656795044] [2024-11-09 07:18:38,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:18:38,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-09 07:18:38,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:18:38,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-09 07:18:38,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=2513, Unknown=2, NotChecked=102, Total=2862 [2024-11-09 07:18:38,321 INFO L87 Difference]: Start difference. First operand 158 states and 208 transitions. Second operand has 42 states, 42 states have (on average 2.238095238095238) internal successors, (94), 42 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:18:49,072 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 [1] [2024-11-09 07:18:57,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 07:18:59,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 07:19:05,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 07:19:07,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 07:19:09,734 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 [1] [2024-11-09 07:19:10,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:19:10,026 INFO L93 Difference]: Finished difference Result 284 states and 369 transitions. [2024-11-09 07:19:10,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-09 07:19:10,027 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.238095238095238) internal successors, (94), 42 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2024-11-09 07:19:10,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:19:10,028 INFO L225 Difference]: With dead ends: 284 [2024-11-09 07:19:10,028 INFO L226 Difference]: Without dead ends: 282 [2024-11-09 07:19:10,029 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 88 SyntacticMatches, 12 SemanticMatches, 64 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 1720 ImplicationChecksByTransitivity, 27.4s TimeCoverageRelationStatistics Valid=378, Invalid=3779, Unknown=7, NotChecked=126, Total=4290 [2024-11-09 07:19:10,030 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 97 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 23 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:19:10,030 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 265 Invalid, 1272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1125 Invalid, 6 Unknown, 118 Unchecked, 14.2s Time] [2024-11-09 07:19:10,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2024-11-09 07:19:10,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 200. [2024-11-09 07:19:10,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.3467336683417086) internal successors, (268), 199 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:19:10,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 268 transitions. [2024-11-09 07:19:10,071 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 268 transitions. Word has length 43 [2024-11-09 07:19:10,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:19:10,071 INFO L471 AbstractCegarLoop]: Abstraction has 200 states and 268 transitions. [2024-11-09 07:19:10,072 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.238095238095238) internal successors, (94), 42 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:19:10,072 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 268 transitions. [2024-11-09 07:19:10,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-09 07:19:10,072 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:19:10,073 INFO L215 NwaCegarLoop]: trace histogram [8, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:19:10,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-09 07:19:10,274 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:19:10,274 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:19:10,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:19:10,274 INFO L85 PathProgramCache]: Analyzing trace with hash -578927115, now seen corresponding path program 9 times [2024-11-09 07:19:10,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:19:10,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665783171] [2024-11-09 07:19:10,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:19:10,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:19:10,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:19:10,616 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-09 07:19:10,616 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:19:10,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665783171] [2024-11-09 07:19:10,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665783171] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:19:10,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353164558] [2024-11-09 07:19:10,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 07:19:10,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:19:10,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:19:10,618 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:19:10,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-09 07:19:10,768 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 07:19:10,768 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:19:10,770 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 07:19:10,771 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:19:10,868 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 35 proven. 33 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 07:19:10,868 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:19:11,018 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 35 proven. 33 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 07:19:11,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353164558] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:19:11,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1273199842] [2024-11-09 07:19:11,020 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 07:19:11,020 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:19:11,020 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:19:11,021 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:19:11,021 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:19:11,548 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:19:12,930 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10387#(and (= |ULTIMATE.start_main_~k~0#1| 1) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#v~0#1.offset| 0) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) 4) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) 0)) (exists ((|v_ULTIMATE.start_main_~j~0#1_323| Int)) (<= (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296) (mod |v_ULTIMATE.start_main_~j~0#1_323| 4294967296))) (<= 2 |ULTIMATE.start_main_~#v~0#1.base|) (<= 2 (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296)))' at error location [2024-11-09 07:19:12,930 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:19:12,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:19:12,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 14 [2024-11-09 07:19:12,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950754140] [2024-11-09 07:19:12,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:19:12,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 07:19:12,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:19:12,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 07:19:12,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2024-11-09 07:19:12,931 INFO L87 Difference]: Start difference. First operand 200 states and 268 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:19:13,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:19:13,589 INFO L93 Difference]: Finished difference Result 297 states and 398 transitions. [2024-11-09 07:19:13,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-09 07:19:13,590 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2024-11-09 07:19:13,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:19:13,591 INFO L225 Difference]: With dead ends: 297 [2024-11-09 07:19:13,591 INFO L226 Difference]: Without dead ends: 237 [2024-11-09 07:19:13,592 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 95 SyntacticMatches, 19 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=370, Invalid=1436, Unknown=0, NotChecked=0, Total=1806 [2024-11-09 07:19:13,592 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 31 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:19:13,593 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 72 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 07:19:13,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2024-11-09 07:19:13,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 219. [2024-11-09 07:19:13,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 1.3577981651376148) internal successors, (296), 218 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:19:13,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 296 transitions. [2024-11-09 07:19:13,641 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 296 transitions. Word has length 43 [2024-11-09 07:19:13,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:19:13,641 INFO L471 AbstractCegarLoop]: Abstraction has 219 states and 296 transitions. [2024-11-09 07:19:13,641 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:19:13,641 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 296 transitions. [2024-11-09 07:19:13,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-09 07:19:13,642 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:19:13,642 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:19:13,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-09 07:19:13,842 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:19:13,842 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:19:13,843 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:19:13,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1890900241, now seen corresponding path program 10 times [2024-11-09 07:19:13,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:19:13,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322748425] [2024-11-09 07:19:13,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:19:13,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:19:13,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:19:16,009 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 11 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:19:16,009 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:19:16,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322748425] [2024-11-09 07:19:16,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322748425] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:19:16,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046934998] [2024-11-09 07:19:16,009 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 07:19:16,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:19:16,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:19:16,011 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:19:16,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-09 07:19:16,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:19:16,156 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-09 07:19:16,159 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:19:16,315 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 27 treesize of output 15 [2024-11-09 07:19:16,462 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:19:16,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 18 [2024-11-09 07:19:16,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:19:16,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:19:16,621 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:19:16,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 18 [2024-11-09 07:19:16,897 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:19:16,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 18 [2024-11-09 07:19:16,940 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:19:16,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-11-09 07:19:16,978 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 07:19:16,979 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:19:17,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 44 [2024-11-09 07:19:30,357 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 52 treesize of output 46 [2024-11-09 07:19:30,387 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:19:30,388 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 79 treesize of output 77 [2024-11-09 07:19:30,588 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 13 proven. 39 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 07:19:30,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046934998] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:19:30,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [721240599] [2024-11-09 07:19:30,590 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 07:19:30,590 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:19:30,590 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:19:30,591 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:19:30,591 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:19:31,212 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:19:33,569 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11456#(and (= |ULTIMATE.start_main_~k~0#1| 1) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#v~0#1.offset| 0) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) 4) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) 0)) (<= 2 |ULTIMATE.start_main_~#v~0#1.base|) (<= 2 (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296)) (exists ((|v_ULTIMATE.start_main_~j~0#1_342| Int)) (<= (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296) (mod |v_ULTIMATE.start_main_~j~0#1_342| 4294967296))))' at error location [2024-11-09 07:19:33,569 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:19:33,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:19:33,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 48 [2024-11-09 07:19:33,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457894516] [2024-11-09 07:19:33,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:19:33,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-09 07:19:33,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:19:33,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-09 07:19:33,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=3029, Unknown=4, NotChecked=0, Total=3422 [2024-11-09 07:19:33,572 INFO L87 Difference]: Start difference. First operand 219 states and 296 transitions. Second operand has 48 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 48 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:19:57,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:19:57,829 INFO L93 Difference]: Finished difference Result 300 states and 388 transitions. [2024-11-09 07:19:57,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-09 07:19:57,833 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 48 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2024-11-09 07:19:57,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:19:57,834 INFO L225 Difference]: With dead ends: 300 [2024-11-09 07:19:57,834 INFO L226 Difference]: Without dead ends: 298 [2024-11-09 07:19:57,835 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 84 SyntacticMatches, 12 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2821 ImplicationChecksByTransitivity, 39.2s TimeCoverageRelationStatistics Valid=790, Invalid=5202, Unknown=14, NotChecked=0, Total=6006 [2024-11-09 07:19:57,836 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 147 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-09 07:19:57,836 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 168 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 950 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-09 07:19:57,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2024-11-09 07:19:57,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 232. [2024-11-09 07:19:57,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.367965367965368) internal successors, (316), 231 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:19:57,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 316 transitions. [2024-11-09 07:19:57,895 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 316 transitions. Word has length 44 [2024-11-09 07:19:57,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:19:57,895 INFO L471 AbstractCegarLoop]: Abstraction has 232 states and 316 transitions. [2024-11-09 07:19:57,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 48 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:19:57,896 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 316 transitions. [2024-11-09 07:19:57,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-09 07:19:57,896 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:19:57,896 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:19:57,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-09 07:19:58,097 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:19:58,097 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:19:58,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:19:58,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1794062300, now seen corresponding path program 5 times [2024-11-09 07:19:58,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:19:58,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197271698] [2024-11-09 07:19:58,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:19:58,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:19:58,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:19:58,639 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-09 07:19:58,639 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:19:58,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197271698] [2024-11-09 07:19:58,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197271698] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:19:58,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039336840] [2024-11-09 07:19:58,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:19:58,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:19:58,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:19:58,642 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:19:58,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-09 07:19:58,865 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 07:19:58,865 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:19:58,867 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 07:19:58,868 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:19:59,176 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 07:19:59,176 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:19:59,764 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 07:19:59,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039336840] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:19:59,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1074957884] [2024-11-09 07:19:59,767 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 07:19:59,767 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:19:59,767 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:19:59,767 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:19:59,767 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:20:00,196 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:20:01,693 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12527#(and (= |ULTIMATE.start_main_~#v~0#1.offset| 0) (<= (+ (mod |ULTIMATE.start_main_~k~0#1| 4294967296) 1) (mod |ULTIMATE.start_main_~SIZE~0#1| 4294967296)) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (* |ULTIMATE.start_main_~k~0#1| 4)) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#v~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (- 4)))) (<= 1 |ULTIMATE.start_main_~k~0#1|))' at error location [2024-11-09 07:20:01,693 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:20:01,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:20:01,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 20 [2024-11-09 07:20:01,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755461200] [2024-11-09 07:20:01,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:20:01,694 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 07:20:01,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:20:01,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 07:20:01,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2024-11-09 07:20:01,695 INFO L87 Difference]: Start difference. First operand 232 states and 316 transitions. Second operand has 20 states, 20 states have (on average 4.4) internal successors, (88), 20 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:20:02,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:20:02,519 INFO L93 Difference]: Finished difference Result 285 states and 369 transitions. [2024-11-09 07:20:02,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-09 07:20:02,520 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.4) internal successors, (88), 20 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2024-11-09 07:20:02,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:20:02,521 INFO L225 Difference]: With dead ends: 285 [2024-11-09 07:20:02,521 INFO L226 Difference]: Without dead ends: 263 [2024-11-09 07:20:02,522 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 105 SyntacticMatches, 9 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=144, Invalid=1188, Unknown=0, NotChecked=0, Total=1332 [2024-11-09 07:20:02,522 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 33 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 07:20:02,523 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 147 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 07:20:02,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2024-11-09 07:20:02,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 250. [2024-11-09 07:20:02,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 1.3052208835341366) internal successors, (325), 249 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:20:02,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 325 transitions. [2024-11-09 07:20:02,583 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 325 transitions. Word has length 45 [2024-11-09 07:20:02,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:20:02,584 INFO L471 AbstractCegarLoop]: Abstraction has 250 states and 325 transitions. [2024-11-09 07:20:02,584 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.4) internal successors, (88), 20 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:20:02,584 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 325 transitions. [2024-11-09 07:20:02,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-09 07:20:02,585 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:20:02,585 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:20:02,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-09 07:20:02,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-09 07:20:02,786 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:20:02,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:20:02,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1598036178, now seen corresponding path program 5 times [2024-11-09 07:20:02,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:20:02,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418188365] [2024-11-09 07:20:02,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:20:02,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:20:02,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 07:20:02,892 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-09 07:20:02,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 07:20:02,998 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2024-11-09 07:20:02,998 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-09 07:20:03,000 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-09 07:20:03,002 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-09 07:20:03,008 INFO L407 BasicCegarLoop]: Path program histogram: [10, 5, 5, 2, 1, 1] [2024-11-09 07:20:03,070 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-09 07:20:03,076 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 07:20:03 BoogieIcfgContainer [2024-11-09 07:20:03,076 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-09 07:20:03,077 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-09 07:20:03,077 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-09 07:20:03,078 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-09 07:20:03,078 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:14:08" (3/4) ... [2024-11-09 07:20:03,079 INFO L136 WitnessPrinter]: Generating witness for reachability counterexample [2024-11-09 07:20:03,156 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab3c5ca9-70d3-4863-9e9b-830a85e9b950/bin/utaipan-verify-YMUCfTKeje/witness.graphml [2024-11-09 07:20:03,156 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-09 07:20:03,157 INFO L158 Benchmark]: Toolchain (without parser) took 355379.65ms. Allocated memory was 159.4MB in the beginning and 497.0MB in the end (delta: 337.6MB). Free memory was 122.4MB in the beginning and 183.4MB in the end (delta: -60.9MB). Peak memory consumption was 278.8MB. Max. memory is 16.1GB. [2024-11-09 07:20:03,157 INFO L158 Benchmark]: CDTParser took 0.73ms. Allocated memory is still 159.4MB. Free memory is still 127.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 07:20:03,157 INFO L158 Benchmark]: CACSL2BoogieTranslator took 328.72ms. Allocated memory is still 159.4MB. Free memory was 122.4MB in the beginning and 109.8MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-11-09 07:20:03,158 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.88ms. Allocated memory is still 159.4MB. Free memory was 109.8MB in the beginning and 108.2MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 07:20:03,160 INFO L158 Benchmark]: Boogie Preprocessor took 28.75ms. Allocated memory is still 159.4MB. Free memory was 108.2MB in the beginning and 106.7MB in the end (delta: 1.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-11-09 07:20:03,161 INFO L158 Benchmark]: RCFGBuilder took 558.24ms. Allocated memory is still 159.4MB. Free memory was 106.7MB in the beginning and 91.5MB in the end (delta: 15.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-11-09 07:20:03,162 INFO L158 Benchmark]: TraceAbstraction took 354333.69ms. Allocated memory was 159.4MB in the beginning and 497.0MB in the end (delta: 337.6MB). Free memory was 91.0MB in the beginning and 186.5MB in the end (delta: -95.5MB). Peak memory consumption was 245.2MB. Max. memory is 16.1GB. [2024-11-09 07:20:03,163 INFO L158 Benchmark]: Witness Printer took 79.04ms. Allocated memory is still 497.0MB. Free memory was 186.5MB in the beginning and 183.4MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-09 07:20:03,164 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.73ms. Allocated memory is still 159.4MB. Free memory is still 127.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 328.72ms. Allocated memory is still 159.4MB. Free memory was 122.4MB in the beginning and 109.8MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.88ms. Allocated memory is still 159.4MB. Free memory was 109.8MB in the beginning and 108.2MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 28.75ms. Allocated memory is still 159.4MB. Free memory was 108.2MB in the beginning and 106.7MB in the end (delta: 1.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 558.24ms. Allocated memory is still 159.4MB. Free memory was 106.7MB in the beginning and 91.5MB in the end (delta: 15.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 354333.69ms. Allocated memory was 159.4MB in the beginning and 497.0MB in the end (delta: 337.6MB). Free memory was 91.0MB in the beginning and 186.5MB in the end (delta: -95.5MB). Peak memory consumption was 245.2MB. Max. memory is 16.1GB. * Witness Printer took 79.04ms. Allocated memory is still 497.0MB. Free memory was 186.5MB in the beginning and 183.4MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] unsigned int SIZE=__VERIFIER_nondet_uint(); [L15] COND FALSE !(SIZE >= 4000000000 / sizeof(int)) [L18] int i, j, k, key; [L19] int v[SIZE]; [L20] j=0 VAL [SIZE=4, j=0, v={5:0}] [L20] COND FALSE !(j=0) && (v[i]>key) [L25] EXPR v[i] [L25] (i>=0) && (v[i]>key) VAL [SIZE=4, i=0, j=1, key=14, v={5:0}] [L25] COND FALSE !((i>=0) && (v[i]>key)) [L30] v[i+1] = key [L22] j++ VAL [SIZE=4, j=2, v={5:0}] [L22] COND FALSE !(j=0) && (v[i]>key) [L25] EXPR v[i] [L25] (i>=0) && (v[i]>key) VAL [SIZE=4, i=1, j=2, key=14, v={5:0}] [L25] COND FALSE !((i>=0) && (v[i]>key)) [L30] v[i+1] = key [L22] j++ VAL [SIZE=4, j=3, v={5:0}] [L22] COND FALSE !(j=0) && (v[i]>key) [L25] EXPR v[i] [L25] (i>=0) && (v[i]>key) VAL [SIZE=4, i=2, j=3, key=13, v={5:0}] [L25] COND TRUE (i>=0) && (v[i]>key) [L26] COND FALSE !(i<2) [L28] i = i - 1 VAL [SIZE=4, i=1, j=3, key=13, v={5:0}] [L25] (i>=0) && (v[i]>key) [L25] EXPR v[i] [L25] (i>=0) && (v[i]>key) VAL [SIZE=4, i=1, j=3, key=13, v={5:0}] [L25] COND TRUE (i>=0) && (v[i]>key) [L26] COND TRUE i<2 [L27] EXPR v[i] [L27] v[i+1] = v[i] [L28] i = i - 1 VAL [SIZE=4, i=0, j=3, key=13, v={5:0}] [L25] (i>=0) && (v[i]>key) [L25] EXPR v[i] [L25] (i>=0) && (v[i]>key) VAL [SIZE=4, i=0, j=3, key=13, v={5:0}] [L25] COND FALSE !((i>=0) && (v[i]>key)) [L30] v[i+1] = key [L22] j++ VAL [SIZE=4, j=4, v={5:0}] [L22] COND TRUE j