./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-lopstr16/break-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a209cfe4-e484-4b67-8195-8267dcd064cf/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a209cfe4-e484-4b67-8195-8267dcd064cf/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a209cfe4-e484-4b67-8195-8267dcd064cf/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a209cfe4-e484-4b67-8195-8267dcd064cf/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-lopstr16/break-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a209cfe4-e484-4b67-8195-8267dcd064cf/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a209cfe4-e484-4b67-8195-8267dcd064cf/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash af12e42a5d3a022d66b7920ff01dec158b3de4df470747e943653bc7f1da2cc9 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:48:19,941 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:48:20,053 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a209cfe4-e484-4b67-8195-8267dcd064cf/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:48:20,060 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:48:20,061 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:48:20,105 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:48:20,106 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:48:20,107 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:48:20,108 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:48:20,113 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:48:20,113 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:48:20,114 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:48:20,115 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:48:20,117 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:48:20,117 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:48:20,117 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:48:20,118 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:48:20,118 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:48:20,119 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:48:20,119 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:48:20,121 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:48:20,122 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:48:20,123 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:48:20,124 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:48:20,124 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:48:20,124 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:48:20,125 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:48:20,125 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:48:20,126 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:48:20,126 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:48:20,128 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:48:20,128 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:48:20,128 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:48:20,129 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:48:20,129 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:48:20,129 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:48:20,130 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:48:20,130 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:48:20,130 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:48:20,130 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:48:20,131 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:48:20,131 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:48:20,131 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:48:20,132 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:48:20,132 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:48:20,133 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_a209cfe4-e484-4b67-8195-8267dcd064cf/bin/utaipan-verify-NcY6lQBIFX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a209cfe4-e484-4b67-8195-8267dcd064cf/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af12e42a5d3a022d66b7920ff01dec158b3de4df470747e943653bc7f1da2cc9 [2023-11-12 00:48:20,498 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:48:20,527 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:48:20,530 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:48:20,531 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:48:20,531 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:48:20,533 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a209cfe4-e484-4b67-8195-8267dcd064cf/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/array-lopstr16/break-2.i [2023-11-12 00:48:23,656 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:48:23,868 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:48:23,869 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a209cfe4-e484-4b67-8195-8267dcd064cf/sv-benchmarks/c/array-lopstr16/break-2.i [2023-11-12 00:48:23,878 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a209cfe4-e484-4b67-8195-8267dcd064cf/bin/utaipan-verify-NcY6lQBIFX/data/8018bf86f/a47a32ecd6a840a2beef00823c15aeb6/FLAG259e174da [2023-11-12 00:48:23,896 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a209cfe4-e484-4b67-8195-8267dcd064cf/bin/utaipan-verify-NcY6lQBIFX/data/8018bf86f/a47a32ecd6a840a2beef00823c15aeb6 [2023-11-12 00:48:23,902 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:48:23,903 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:48:23,907 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:48:23,907 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:48:23,912 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:48:23,913 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:48:23" (1/1) ... [2023-11-12 00:48:23,914 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@333ea5c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:23, skipping insertion in model container [2023-11-12 00:48:23,914 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:48:23" (1/1) ... [2023-11-12 00:48:23,938 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:48:24,161 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a209cfe4-e484-4b67-8195-8267dcd064cf/sv-benchmarks/c/array-lopstr16/break-2.i[800,813] [2023-11-12 00:48:24,178 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:48:32,642 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:48:32,655 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a209cfe4-e484-4b67-8195-8267dcd064cf/sv-benchmarks/c/array-lopstr16/break-2.i[800,813] [2023-11-12 00:48:32,660 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:48:32,677 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:48:32,677 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:32 WrapperNode [2023-11-12 00:48:32,677 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:48:32,679 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:48:32,679 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:48:32,679 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:48:32,687 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:32" (1/1) ... [2023-11-12 00:48:32,696 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:32" (1/1) ... [2023-11-12 00:48:32,714 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 42 [2023-11-12 00:48:32,715 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:48:32,716 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:48:32,716 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:48:32,716 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:48:32,726 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:32" (1/1) ... [2023-11-12 00:48:32,727 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:32" (1/1) ... [2023-11-12 00:48:32,729 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:32" (1/1) ... [2023-11-12 00:48:32,729 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:32" (1/1) ... [2023-11-12 00:48:32,744 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:32" (1/1) ... [2023-11-12 00:48:32,747 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:32" (1/1) ... [2023-11-12 00:48:32,751 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:32" (1/1) ... [2023-11-12 00:48:32,752 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:32" (1/1) ... [2023-11-12 00:48:32,754 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:48:32,755 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:48:32,755 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:48:32,756 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:48:32,756 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:32" (1/1) ... [2023-11-12 00:48:32,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:48:32,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a209cfe4-e484-4b67-8195-8267dcd064cf/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:48:32,788 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a209cfe4-e484-4b67-8195-8267dcd064cf/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:48:32,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a209cfe4-e484-4b67-8195-8267dcd064cf/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:48:32,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:48:32,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:48:32,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:48:32,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:48:32,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:48:32,833 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:48:32,922 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:48:32,933 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:48:33,111 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:48:33,142 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:48:33,146 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 00:48:33,149 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:48:33 BoogieIcfgContainer [2023-11-12 00:48:33,149 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:48:33,152 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:48:33,152 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:48:33,156 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:48:33,156 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:48:23" (1/3) ... [2023-11-12 00:48:33,158 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@671c3eaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:48:33, skipping insertion in model container [2023-11-12 00:48:33,158 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:32" (2/3) ... [2023-11-12 00:48:33,162 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@671c3eaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:48:33, skipping insertion in model container [2023-11-12 00:48:33,162 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:48:33" (3/3) ... [2023-11-12 00:48:33,163 INFO L112 eAbstractionObserver]: Analyzing ICFG break-2.i [2023-11-12 00:48:33,185 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:48:33,185 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:48:33,246 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:48:33,254 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@48e7d7bc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:48:33,254 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:48:33,258 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:33,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-12 00:48:33,265 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:33,266 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:48:33,267 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:48:33,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:33,272 INFO L85 PathProgramCache]: Analyzing trace with hash 696685750, now seen corresponding path program 1 times [2023-11-12 00:48:33,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:33,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518600742] [2023-11-12 00:48:33,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:33,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:33,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:33,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:48:33,466 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:33,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518600742] [2023-11-12 00:48:33,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518600742] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:48:33,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:48:33,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:48:33,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699257387] [2023-11-12 00:48:33,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:48:33,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:48:33,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:33,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:48:33,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:48:33,510 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:33,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:33,564 INFO L93 Difference]: Finished difference Result 30 states and 41 transitions. [2023-11-12 00:48:33,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:48:33,568 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2023-11-12 00:48:33,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:33,577 INFO L225 Difference]: With dead ends: 30 [2023-11-12 00:48:33,577 INFO L226 Difference]: Without dead ends: 20 [2023-11-12 00:48:33,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:48:33,587 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 7 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:33,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 11 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:48:33,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-12 00:48:33,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 15. [2023-11-12 00:48:33,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:33,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2023-11-12 00:48:33,629 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 7 [2023-11-12 00:48:33,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:33,629 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2023-11-12 00:48:33,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:33,630 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2023-11-12 00:48:33,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-12 00:48:33,631 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:33,631 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:48:33,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:48:33,632 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:48:33,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:33,633 INFO L85 PathProgramCache]: Analyzing trace with hash -732647900, now seen corresponding path program 1 times [2023-11-12 00:48:33,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:33,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390444838] [2023-11-12 00:48:33,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:33,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:33,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:33,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:48:33,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:33,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390444838] [2023-11-12 00:48:33,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390444838] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:48:33,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261262961] [2023-11-12 00:48:33,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:33,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:48:33,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a209cfe4-e484-4b67-8195-8267dcd064cf/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:48:33,757 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a209cfe4-e484-4b67-8195-8267dcd064cf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:48:33,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a209cfe4-e484-4b67-8195-8267dcd064cf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:48:33,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:33,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:48:33,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:48:33,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:48:33,899 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:48:33,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:48:33,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261262961] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:48:33,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [182224481] [2023-11-12 00:48:33,946 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-12 00:48:33,946 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:48:33,950 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:48:33,956 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:48:33,956 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:48:34,443 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:48:34,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [182224481] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:48:34,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:48:34,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3] total 8 [2023-11-12 00:48:34,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252486592] [2023-11-12 00:48:34,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:48:34,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:48:34,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:34,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:48:34,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:48:34,531 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:34,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:34,573 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2023-11-12 00:48:34,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:48:34,574 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-12 00:48:34,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:34,576 INFO L225 Difference]: With dead ends: 26 [2023-11-12 00:48:34,576 INFO L226 Difference]: Without dead ends: 16 [2023-11-12 00:48:34,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:48:34,581 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 18 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:34,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 5 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:48:34,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-12 00:48:34,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2023-11-12 00:48:34,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:34,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2023-11-12 00:48:34,596 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2023-11-12 00:48:34,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:34,597 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2023-11-12 00:48:34,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:34,599 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2023-11-12 00:48:34,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-12 00:48:34,601 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:34,601 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:48:34,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a209cfe4-e484-4b67-8195-8267dcd064cf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:48:34,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a209cfe4-e484-4b67-8195-8267dcd064cf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:48:34,812 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:48:34,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:34,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1124265805, now seen corresponding path program 1 times [2023-11-12 00:48:34,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:34,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064558320] [2023-11-12 00:48:34,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:34,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:34,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:34,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:48:34,939 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:34,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064558320] [2023-11-12 00:48:34,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064558320] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:48:34,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973885729] [2023-11-12 00:48:34,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:34,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:48:34,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a209cfe4-e484-4b67-8195-8267dcd064cf/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:48:34,946 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a209cfe4-e484-4b67-8195-8267dcd064cf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:48:34,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a209cfe4-e484-4b67-8195-8267dcd064cf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:48:35,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:35,015 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:48:35,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:48:35,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:48:35,043 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:48:35,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:48:35,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973885729] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:48:35,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1307732921] [2023-11-12 00:48:35,082 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-12 00:48:35,082 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:48:35,083 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:48:35,083 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:48:35,083 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:48:35,423 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:48:35,866 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '241#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~i~0#1| 0) (= |~#s~0.base| 3) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| 3) 0)) (= |~#s~0.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (not (= |ULTIMATE.start_main_#t~mem3#1| 10)))' at error location [2023-11-12 00:48:35,867 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:48:35,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:48:35,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-12 00:48:35,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650210314] [2023-11-12 00:48:35,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:48:35,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:48:35,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:35,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:48:35,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2023-11-12 00:48:35,872 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:35,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:35,978 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2023-11-12 00:48:35,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:48:35,979 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-12 00:48:35,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:35,980 INFO L225 Difference]: With dead ends: 53 [2023-11-12 00:48:35,981 INFO L226 Difference]: Without dead ends: 43 [2023-11-12 00:48:35,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2023-11-12 00:48:35,985 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 30 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:35,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 23 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:48:35,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-12 00:48:36,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2023-11-12 00:48:36,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:36,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2023-11-12 00:48:36,010 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 10 [2023-11-12 00:48:36,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:36,011 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2023-11-12 00:48:36,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:36,012 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2023-11-12 00:48:36,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-12 00:48:36,014 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:36,014 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:48:36,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a209cfe4-e484-4b67-8195-8267dcd064cf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:48:36,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a209cfe4-e484-4b67-8195-8267dcd064cf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:48:36,220 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:48:36,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:36,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1620966743, now seen corresponding path program 2 times [2023-11-12 00:48:36,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:36,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169514966] [2023-11-12 00:48:36,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:36,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:36,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:36,427 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:48:36,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:36,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169514966] [2023-11-12 00:48:36,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169514966] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:48:36,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916411920] [2023-11-12 00:48:36,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:48:36,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:48:36,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a209cfe4-e484-4b67-8195-8267dcd064cf/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:48:36,430 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a209cfe4-e484-4b67-8195-8267dcd064cf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:48:36,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a209cfe4-e484-4b67-8195-8267dcd064cf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:48:36,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-12 00:48:36,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:48:36,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 00:48:36,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:48:36,543 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:48:36,543 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:48:36,638 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:48:36,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916411920] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:48:36,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [71874954] [2023-11-12 00:48:36,644 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-12 00:48:36,644 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:48:36,644 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:48:36,644 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:48:36,645 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:48:36,864 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:48:37,037 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '461#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~i~0#1| 0) (= |~#s~0.base| 3) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| 3) 0)) (= |~#s~0.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (not (= |ULTIMATE.start_main_#t~mem3#1| 10)))' at error location [2023-11-12 00:48:37,038 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:48:37,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:48:37,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-12 00:48:37,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351355272] [2023-11-12 00:48:37,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:48:37,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 00:48:37,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:37,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 00:48:37,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2023-11-12 00:48:37,041 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:37,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:37,176 INFO L93 Difference]: Finished difference Result 122 states and 140 transitions. [2023-11-12 00:48:37,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 00:48:37,177 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-12 00:48:37,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:37,180 INFO L225 Difference]: With dead ends: 122 [2023-11-12 00:48:37,180 INFO L226 Difference]: Without dead ends: 97 [2023-11-12 00:48:37,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2023-11-12 00:48:37,185 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 150 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:37,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 43 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:48:37,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-12 00:48:37,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 78. [2023-11-12 00:48:37,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.155844155844156) internal successors, (89), 77 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:37,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 89 transitions. [2023-11-12 00:48:37,214 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 89 transitions. Word has length 16 [2023-11-12 00:48:37,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:37,214 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 89 transitions. [2023-11-12 00:48:37,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:37,215 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 89 transitions. [2023-11-12 00:48:37,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-12 00:48:37,216 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:37,216 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:48:37,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a209cfe4-e484-4b67-8195-8267dcd064cf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:48:37,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a209cfe4-e484-4b67-8195-8267dcd064cf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:48:37,422 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:48:37,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:37,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1321806571, now seen corresponding path program 3 times [2023-11-12 00:48:37,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:37,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257520326] [2023-11-12 00:48:37,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:37,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:37,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:37,686 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:48:37,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:37,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257520326] [2023-11-12 00:48:37,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257520326] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:48:37,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336581877] [2023-11-12 00:48:37,686 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 00:48:37,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:48:37,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a209cfe4-e484-4b67-8195-8267dcd064cf/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:48:37,688 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a209cfe4-e484-4b67-8195-8267dcd064cf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:48:37,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a209cfe4-e484-4b67-8195-8267dcd064cf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:48:37,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 00:48:37,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:48:37,768 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 00:48:37,770 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:48:37,822 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:48:37,822 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:48:38,079 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:48:38,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336581877] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:48:38,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [718134399] [2023-11-12 00:48:38,081 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-12 00:48:38,082 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:48:38,082 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:48:38,082 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:48:38,082 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:48:38,226 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:48:38,362 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '903#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~i~0#1| 0) (= |~#s~0.base| 3) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| 3) 0)) (= |~#s~0.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (not (= |ULTIMATE.start_main_#t~mem3#1| 10)))' at error location [2023-11-12 00:48:38,362 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:48:38,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:48:38,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-11-12 00:48:38,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466039648] [2023-11-12 00:48:38,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:48:38,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-12 00:48:38,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:38,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-12 00:48:38,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=538, Unknown=0, NotChecked=0, Total=930 [2023-11-12 00:48:38,366 INFO L87 Difference]: Start difference. First operand 78 states and 89 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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) [2023-11-12 00:48:38,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:38,653 INFO L93 Difference]: Finished difference Result 260 states and 296 transitions. [2023-11-12 00:48:38,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-12 00:48:38,654 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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 [2023-11-12 00:48:38,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:38,658 INFO L225 Difference]: With dead ends: 260 [2023-11-12 00:48:38,658 INFO L226 Difference]: Without dead ends: 205 [2023-11-12 00:48:38,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=392, Invalid=538, Unknown=0, NotChecked=0, Total=930 [2023-11-12 00:48:38,660 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 378 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:38,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 95 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:48:38,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2023-11-12 00:48:38,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 162. [2023-11-12 00:48:38,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.1490683229813665) internal successors, (185), 161 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:38,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 185 transitions. [2023-11-12 00:48:38,702 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 185 transitions. Word has length 28 [2023-11-12 00:48:38,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:38,702 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 185 transitions. [2023-11-12 00:48:38,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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) [2023-11-12 00:48:38,703 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 185 transitions. [2023-11-12 00:48:38,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-12 00:48:38,704 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:38,705 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:48:38,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a209cfe4-e484-4b67-8195-8267dcd064cf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:48:38,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a209cfe4-e484-4b67-8195-8267dcd064cf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:48:38,906 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:48:38,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:38,906 INFO L85 PathProgramCache]: Analyzing trace with hash -117001235, now seen corresponding path program 4 times [2023-11-12 00:48:38,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:38,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721531632] [2023-11-12 00:48:38,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:38,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:38,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:39,589 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:48:39,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:39,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721531632] [2023-11-12 00:48:39,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721531632] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:48:39,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849237975] [2023-11-12 00:48:39,590 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 00:48:39,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:48:39,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a209cfe4-e484-4b67-8195-8267dcd064cf/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:48:39,591 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a209cfe4-e484-4b67-8195-8267dcd064cf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:48:39,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a209cfe4-e484-4b67-8195-8267dcd064cf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:48:39,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:39,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-12 00:48:39,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:48:39,786 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:48:39,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:48:40,757 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:48:40,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849237975] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:48:40,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [558194584] [2023-11-12 00:48:40,760 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-12 00:48:40,760 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:48:40,760 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:48:40,761 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:48:40,761 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:48:41,047 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:48:41,234 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1789#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~i~0#1| 0) (= |~#s~0.base| 3) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| 3) 0)) (= |~#s~0.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (not (= |ULTIMATE.start_main_#t~mem3#1| 10)))' at error location [2023-11-12 00:48:41,234 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:48:41,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:48:41,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2023-11-12 00:48:41,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742909368] [2023-11-12 00:48:41,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:48:41,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-12 00:48:41,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:41,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-12 00:48:41,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1340, Invalid=1630, Unknown=0, NotChecked=0, Total=2970 [2023-11-12 00:48:41,240 INFO L87 Difference]: Start difference. First operand 162 states and 185 transitions. Second operand has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 48 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:42,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:42,146 INFO L93 Difference]: Finished difference Result 536 states and 608 transitions. [2023-11-12 00:48:42,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-12 00:48:42,148 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 48 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2023-11-12 00:48:42,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:42,151 INFO L225 Difference]: With dead ends: 536 [2023-11-12 00:48:42,152 INFO L226 Difference]: Without dead ends: 421 [2023-11-12 00:48:42,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1340, Invalid=1630, Unknown=0, NotChecked=0, Total=2970 [2023-11-12 00:48:42,155 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 888 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:42,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [888 Valid, 191 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:48:42,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2023-11-12 00:48:42,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 330. [2023-11-12 00:48:42,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 1.1458966565349544) internal successors, (377), 329 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:42,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 377 transitions. [2023-11-12 00:48:42,187 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 377 transitions. Word has length 52 [2023-11-12 00:48:42,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:42,187 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 377 transitions. [2023-11-12 00:48:42,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 48 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:42,188 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 377 transitions. [2023-11-12 00:48:42,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-12 00:48:42,192 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:42,192 INFO L195 NwaCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:48:42,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a209cfe4-e484-4b67-8195-8267dcd064cf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-12 00:48:42,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a209cfe4-e484-4b67-8195-8267dcd064cf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:48:42,399 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:48:42,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:42,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1395435107, now seen corresponding path program 5 times [2023-11-12 00:48:42,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:42,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125013208] [2023-11-12 00:48:42,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:42,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:42,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:45,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:48:45,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:45,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125013208] [2023-11-12 00:48:45,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125013208] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:48:45,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024880781] [2023-11-12 00:48:45,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:48:45,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:48:45,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a209cfe4-e484-4b67-8195-8267dcd064cf/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:48:45,326 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a209cfe4-e484-4b67-8195-8267dcd064cf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:48:45,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a209cfe4-e484-4b67-8195-8267dcd064cf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process