./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext2-properties/list_and_tree_cnstr-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87dccc93-4ef3-44c6-a0b1-abdedb85e8ef/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87dccc93-4ef3-44c6-a0b1-abdedb85e8ef/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_87dccc93-4ef3-44c6-a0b1-abdedb85e8ef/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87dccc93-4ef3-44c6-a0b1-abdedb85e8ef/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-ext2-properties/list_and_tree_cnstr-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87dccc93-4ef3-44c6-a0b1-abdedb85e8ef/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_87dccc93-4ef3-44c6-a0b1-abdedb85e8ef/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 073ee5c5f9e0a51509973bbde311a97e7673effbb0d5db6a027ba4e786762a02 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:48:17,631 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:48:17,706 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87dccc93-4ef3-44c6-a0b1-abdedb85e8ef/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:48:17,712 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:48:17,713 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:48:17,739 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:48:17,740 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:48:17,741 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:48:17,741 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:48:17,742 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:48:17,743 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:48:17,743 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:48:17,744 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:48:17,744 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:48:17,745 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:48:17,746 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:48:17,746 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:48:17,747 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:48:17,747 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:48:17,748 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:48:17,749 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:48:17,750 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:48:17,751 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:48:17,751 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:48:17,752 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:48:17,752 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:48:17,753 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:48:17,753 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:48:17,754 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:48:17,754 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:48:17,755 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:48:17,755 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:48:17,756 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:48:17,756 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:48:17,757 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:48:17,757 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:48:17,757 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:48:17,758 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:48:17,758 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:48:17,759 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:48:17,759 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:48:17,760 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:48:17,760 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:48:17,760 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:48:17,761 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:48:17,761 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_87dccc93-4ef3-44c6-a0b1-abdedb85e8ef/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87dccc93-4ef3-44c6-a0b1-abdedb85e8ef/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 073ee5c5f9e0a51509973bbde311a97e7673effbb0d5db6a027ba4e786762a02 [2023-11-12 00:48:18,030 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:48:18,065 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:48:18,067 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:48:18,069 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:48:18,069 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:48:18,072 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87dccc93-4ef3-44c6-a0b1-abdedb85e8ef/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/list-ext2-properties/list_and_tree_cnstr-2.i [2023-11-12 00:48:21,302 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:48:21,556 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:48:21,557 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87dccc93-4ef3-44c6-a0b1-abdedb85e8ef/sv-benchmarks/c/list-ext2-properties/list_and_tree_cnstr-2.i [2023-11-12 00:48:21,574 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87dccc93-4ef3-44c6-a0b1-abdedb85e8ef/bin/utaipan-verify-NcY6lQBIFX/data/2e09430e0/df369530b1be41848bde5ee104f690f1/FLAGe9f15753e [2023-11-12 00:48:21,591 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87dccc93-4ef3-44c6-a0b1-abdedb85e8ef/bin/utaipan-verify-NcY6lQBIFX/data/2e09430e0/df369530b1be41848bde5ee104f690f1 [2023-11-12 00:48:21,594 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:48:21,596 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:48:21,599 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:48:21,599 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:48:21,612 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:48:21,615 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:48:21" (1/1) ... [2023-11-12 00:48:21,618 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71b2c1c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:21, skipping insertion in model container [2023-11-12 00:48:21,618 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:48:21" (1/1) ... [2023-11-12 00:48:21,694 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:48:22,095 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_87dccc93-4ef3-44c6-a0b1-abdedb85e8ef/sv-benchmarks/c/list-ext2-properties/list_and_tree_cnstr-2.i[24291,24304] [2023-11-12 00:48:22,107 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:48:22,119 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:48:22,202 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_87dccc93-4ef3-44c6-a0b1-abdedb85e8ef/sv-benchmarks/c/list-ext2-properties/list_and_tree_cnstr-2.i[24291,24304] [2023-11-12 00:48:22,207 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:48:22,248 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:48:22,249 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:22 WrapperNode [2023-11-12 00:48:22,249 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:48:22,251 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:48:22,251 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:48:22,251 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:48:22,259 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:22" (1/1) ... [2023-11-12 00:48:22,275 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:22" (1/1) ... [2023-11-12 00:48:22,306 INFO L138 Inliner]: procedures = 122, calls = 54, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 210 [2023-11-12 00:48:22,307 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:48:22,308 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:48:22,308 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:48:22,308 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:48:22,327 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:22" (1/1) ... [2023-11-12 00:48:22,327 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:22" (1/1) ... [2023-11-12 00:48:22,332 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:22" (1/1) ... [2023-11-12 00:48:22,333 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:22" (1/1) ... [2023-11-12 00:48:22,344 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:22" (1/1) ... [2023-11-12 00:48:22,349 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:22" (1/1) ... [2023-11-12 00:48:22,352 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:22" (1/1) ... [2023-11-12 00:48:22,354 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:22" (1/1) ... [2023-11-12 00:48:22,358 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:48:22,359 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:48:22,359 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:48:22,359 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:48:22,360 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:22" (1/1) ... [2023-11-12 00:48:22,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:48:22,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87dccc93-4ef3-44c6-a0b1-abdedb85e8ef/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:48:22,399 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87dccc93-4ef3-44c6-a0b1-abdedb85e8ef/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:48:22,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87dccc93-4ef3-44c6-a0b1-abdedb85e8ef/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:48:22,454 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-11-12 00:48:22,454 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-11-12 00:48:22,454 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:48:22,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:48:22,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 00:48:22,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:48:22,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 00:48:22,455 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 00:48:22,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:48:22,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:48:22,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:48:22,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:48:22,560 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:48:22,562 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:48:22,625 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-11-12 00:48:23,054 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:48:23,256 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:48:23,256 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-11-12 00:48:23,259 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:48:23 BoogieIcfgContainer [2023-11-12 00:48:23,260 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:48:23,265 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:48:23,265 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:48:23,268 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:48:23,268 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:48:21" (1/3) ... [2023-11-12 00:48:23,270 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b7a472b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:48:23, skipping insertion in model container [2023-11-12 00:48:23,270 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:22" (2/3) ... [2023-11-12 00:48:23,272 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b7a472b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:48:23, skipping insertion in model container [2023-11-12 00:48:23,272 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:48:23" (3/3) ... [2023-11-12 00:48:23,274 INFO L112 eAbstractionObserver]: Analyzing ICFG list_and_tree_cnstr-2.i [2023-11-12 00:48:23,300 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:48:23,300 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:48:23,360 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:48:23,367 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;@5e19127f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:48:23,368 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:48:23,372 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 32 states have (on average 1.625) internal successors, (52), 35 states have internal predecessors, (52), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:23,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-12 00:48:23,380 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:23,380 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:48:23,381 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:48:23,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:23,387 INFO L85 PathProgramCache]: Analyzing trace with hash 2024005546, now seen corresponding path program 1 times [2023-11-12 00:48:23,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:23,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011257254] [2023-11-12 00:48:23,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:23,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:23,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:23,613 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 00:48:23,614 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:23,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011257254] [2023-11-12 00:48:23,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011257254] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:48:23,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:48:23,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:48:23,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375765507] [2023-11-12 00:48:23,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:48:23,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 00:48:23,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:23,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 00:48:23,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:48:23,665 INFO L87 Difference]: Start difference. First operand has 37 states, 32 states have (on average 1.625) internal successors, (52), 35 states have internal predecessors, (52), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 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 00:48:23,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:23,773 INFO L93 Difference]: Finished difference Result 73 states and 109 transitions. [2023-11-12 00:48:23,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 00:48:23,776 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2023-11-12 00:48:23,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:23,783 INFO L225 Difference]: With dead ends: 73 [2023-11-12 00:48:23,783 INFO L226 Difference]: Without dead ends: 30 [2023-11-12 00:48:23,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:48:23,792 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:23,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:48:23,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-12 00:48:23,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-11-12 00:48:23,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:23,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2023-11-12 00:48:23,833 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2023-11-12 00:48:23,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:23,834 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2023-11-12 00:48:23,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 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 00:48:23,835 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2023-11-12 00:48:23,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-12 00:48:23,836 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:23,836 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:48:23,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:48:23,837 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:48:23,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:23,838 INFO L85 PathProgramCache]: Analyzing trace with hash -62729099, now seen corresponding path program 1 times [2023-11-12 00:48:23,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:23,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677652041] [2023-11-12 00:48:23,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:23,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:23,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:23,970 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 00:48:23,970 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:23,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677652041] [2023-11-12 00:48:23,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677652041] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:48:23,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:48:23,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:48:23,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666238853] [2023-11-12 00:48:23,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:48:23,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:48:23,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:23,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:48:23,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:48:23,976 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:24,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:24,154 INFO L93 Difference]: Finished difference Result 53 states and 65 transitions. [2023-11-12 00:48:24,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:48:24,155 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-12 00:48:24,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:24,156 INFO L225 Difference]: With dead ends: 53 [2023-11-12 00:48:24,157 INFO L226 Difference]: Without dead ends: 34 [2023-11-12 00:48:24,157 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 00:48:24,159 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 9 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:24,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 50 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:48:24,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-12 00:48:24,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2023-11-12 00:48:24,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 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 00:48:24,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2023-11-12 00:48:24,167 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 19 [2023-11-12 00:48:24,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:24,167 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2023-11-12 00:48:24,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:24,168 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2023-11-12 00:48:24,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-12 00:48:24,169 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:24,169 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:48:24,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:48:24,170 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:48:24,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:24,170 INFO L85 PathProgramCache]: Analyzing trace with hash -398038175, now seen corresponding path program 1 times [2023-11-12 00:48:24,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:24,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257887022] [2023-11-12 00:48:24,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:24,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:24,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:24,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:48:24,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:24,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257887022] [2023-11-12 00:48:24,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257887022] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:48:24,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:48:24,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:48:24,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283861929] [2023-11-12 00:48:24,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:48:24,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:48:24,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:24,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:48:24,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:48:24,512 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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) [2023-11-12 00:48:24,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:24,998 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2023-11-12 00:48:24,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:48:24,999 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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 23 [2023-11-12 00:48:24,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:25,001 INFO L225 Difference]: With dead ends: 56 [2023-11-12 00:48:25,001 INFO L226 Difference]: Without dead ends: 52 [2023-11-12 00:48:25,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:48:25,003 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:25,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 79 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:48:25,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-12 00:48:25,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2023-11-12 00:48:25,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 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) [2023-11-12 00:48:25,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2023-11-12 00:48:25,011 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 23 [2023-11-12 00:48:25,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:25,012 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2023-11-12 00:48:25,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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) [2023-11-12 00:48:25,012 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2023-11-12 00:48:25,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-12 00:48:25,013 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:25,013 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:48:25,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:48:25,014 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:48:25,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:25,014 INFO L85 PathProgramCache]: Analyzing trace with hash -213916676, now seen corresponding path program 1 times [2023-11-12 00:48:25,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:25,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863536262] [2023-11-12 00:48:25,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:25,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:25,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:25,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:48:25,201 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:25,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863536262] [2023-11-12 00:48:25,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863536262] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:48:25,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:48:25,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:48:25,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237357481] [2023-11-12 00:48:25,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:48:25,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:48:25,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:25,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:48:25,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:48:25,204 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 00:48:25,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:25,683 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2023-11-12 00:48:25,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:48:25,684 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2023-11-12 00:48:25,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:25,685 INFO L225 Difference]: With dead ends: 58 [2023-11-12 00:48:25,685 INFO L226 Difference]: Without dead ends: 50 [2023-11-12 00:48:25,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:48:25,687 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:25,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 84 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:48:25,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-12 00:48:25,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2023-11-12 00:48:25,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 37 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:25,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2023-11-12 00:48:25,704 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 25 [2023-11-12 00:48:25,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:25,704 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2023-11-12 00:48:25,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 00:48:25,705 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2023-11-12 00:48:25,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-12 00:48:25,706 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:25,706 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:48:25,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:48:25,707 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:48:25,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:25,708 INFO L85 PathProgramCache]: Analyzing trace with hash 810786300, now seen corresponding path program 1 times [2023-11-12 00:48:25,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:25,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174890385] [2023-11-12 00:48:25,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:25,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:25,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:25,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:48:25,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:25,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174890385] [2023-11-12 00:48:25,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174890385] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:48:25,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:48:25,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:48:25,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100148979] [2023-11-12 00:48:25,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:48:25,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:48:25,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:25,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:48:25,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:48:25,930 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 00:48:26,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:26,294 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2023-11-12 00:48:26,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:48:26,296 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2023-11-12 00:48:26,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:26,297 INFO L225 Difference]: With dead ends: 58 [2023-11-12 00:48:26,297 INFO L226 Difference]: Without dead ends: 47 [2023-11-12 00:48:26,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:48:26,299 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 15 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:26,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 71 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:48:26,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-12 00:48:26,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2023-11-12 00:48:26,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 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) [2023-11-12 00:48:26,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2023-11-12 00:48:26,305 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 25 [2023-11-12 00:48:26,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:26,305 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2023-11-12 00:48:26,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 00:48:26,306 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2023-11-12 00:48:26,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-12 00:48:26,306 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:26,307 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:48:26,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 00:48:26,307 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:48:26,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:26,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1225887176, now seen corresponding path program 1 times [2023-11-12 00:48:26,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:26,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44049213] [2023-11-12 00:48:26,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:26,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:26,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:26,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:48:26,813 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:26,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44049213] [2023-11-12 00:48:26,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44049213] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:48:26,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714062537] [2023-11-12 00:48:26,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:26,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:48:26,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87dccc93-4ef3-44c6-a0b1-abdedb85e8ef/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:48:26,822 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87dccc93-4ef3-44c6-a0b1-abdedb85e8ef/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:48:26,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87dccc93-4ef3-44c6-a0b1-abdedb85e8ef/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:48:26,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:26,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-12 00:48:27,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:48:27,060 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-12 00:48:27,216 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-12 00:48:27,216 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-12 00:48:27,226 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-12 00:48:27,299 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-12 00:48:27,373 INFO L351 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 16 treesize of output 11 [2023-11-12 00:48:27,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:48:27,419 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:48:27,443 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_239 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_239) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 2)) is different from false [2023-11-12 00:48:27,481 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_238 (Array Int Int)) (v_ArrVal_239 (Array Int Int))) (or (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_238) |c_ULTIMATE.start_main_~t~0#1.base| v_ArrVal_239) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 2) (not (= v_ArrVal_238 (let ((.cse0 (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4))) (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) .cse0 (select v_ArrVal_238 .cse0))))))) is different from false [2023-11-12 00:48:27,522 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:48:27,523 INFO L351 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 70 treesize of output 74 [2023-11-12 00:48:27,540 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2023-11-12 00:48:27,592 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-12 00:48:27,608 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 98 [2023-11-12 00:48:27,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-11-12 00:48:27,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714062537] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:48:27,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [66812061] [2023-11-12 00:48:27,815 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-11-12 00:48:27,816 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:48:27,821 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:48:27,828 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:48:27,829 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:48:29,693 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:48:33,374 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '855#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~root~0#1.base| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) 0) 2)) (exists ((|v_#memory_int_118| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~p~0#1.base_33| Int) (|v_#memory_$Pointer$.base_94| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~p~0#1.offset_31| Int) (|v_#memory_$Pointer$.offset_93| (Array Int (Array Int Int)))) (and (= |#memory_int| (store |v_#memory_int_118| |v_ULTIMATE.start_main_~p~0#1.base_33| (store (select |v_#memory_int_118| |v_ULTIMATE.start_main_~p~0#1.base_33|) |v_ULTIMATE.start_main_~p~0#1.offset_31| 3))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_93| |v_ULTIMATE.start_main_~p~0#1.base_33| (store (select |v_#memory_$Pointer$.offset_93| |v_ULTIMATE.start_main_~p~0#1.base_33|) |v_ULTIMATE.start_main_~p~0#1.offset_31| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~p~0#1.base_33|) |v_ULTIMATE.start_main_~p~0#1.offset_31|)))) (= (store |v_#memory_$Pointer$.base_94| |v_ULTIMATE.start_main_~p~0#1.base_33| (store (select |v_#memory_$Pointer$.base_94| |v_ULTIMATE.start_main_~p~0#1.base_33|) |v_ULTIMATE.start_main_~p~0#1.offset_31| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~p~0#1.base_33|) |v_ULTIMATE.start_main_~p~0#1.offset_31|))) |#memory_$Pointer$.base|))) (= |ULTIMATE.start_main_~root~0#1.offset| 0) (= |ULTIMATE.start_main_~pred~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) 0) 3)) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) 0) 1)) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_main_~p~0#1.base|) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (= |ULTIMATE.start_main_~pred~0#1.base| 0) (= |ULTIMATE.start_main_~n~0#1.offset| 0))' at error location [2023-11-12 00:48:33,374 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:48:33,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:48:33,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-11-12 00:48:33,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285965145] [2023-11-12 00:48:33,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:48:33,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-12 00:48:33,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:33,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-12 00:48:33,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=930, Unknown=2, NotChecked=126, Total=1190 [2023-11-12 00:48:33,377 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 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 00:48:34,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:34,469 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2023-11-12 00:48:34,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 00:48:34,470 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 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 27 [2023-11-12 00:48:34,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:34,471 INFO L225 Difference]: With dead ends: 60 [2023-11-12 00:48:34,471 INFO L226 Difference]: Without dead ends: 56 [2023-11-12 00:48:34,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=193, Invalid=1295, Unknown=2, NotChecked=150, Total=1640 [2023-11-12 00:48:34,473 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 71 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:34,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 133 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 150 Invalid, 0 Unknown, 113 Unchecked, 0.9s Time] [2023-11-12 00:48:34,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-12 00:48:34,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 44. [2023-11-12 00:48:34,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.255813953488372) internal successors, (54), 43 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 00:48:34,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2023-11-12 00:48:34,488 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 27 [2023-11-12 00:48:34,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:34,489 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2023-11-12 00:48:34,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 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 00:48:34,491 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2023-11-12 00:48:34,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-12 00:48:34,494 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:34,495 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:48:34,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87dccc93-4ef3-44c6-a0b1-abdedb85e8ef/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 00:48:34,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87dccc93-4ef3-44c6-a0b1-abdedb85e8ef/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 00:48:34,702 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:48:34,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:34,703 INFO L85 PathProgramCache]: Analyzing trace with hash 2089288840, now seen corresponding path program 1 times [2023-11-12 00:48:34,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:34,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545186181] [2023-11-12 00:48:34,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:34,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:34,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:35,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:48:35,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:35,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545186181] [2023-11-12 00:48:35,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545186181] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:48:35,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620014938] [2023-11-12 00:48:35,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:35,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:48:35,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87dccc93-4ef3-44c6-a0b1-abdedb85e8ef/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:48:35,131 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87dccc93-4ef3-44c6-a0b1-abdedb85e8ef/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:48:35,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87dccc93-4ef3-44c6-a0b1-abdedb85e8ef/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:48:35,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:35,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-12 00:48:35,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:48:35,291 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-12 00:48:35,358 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-12 00:48:35,368 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-12 00:48:35,369 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-12 00:48:35,426 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-12 00:48:35,479 INFO L351 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 16 treesize of output 11 [2023-11-12 00:48:35,501 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:48:35,501 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:48:35,561 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_337 (Array Int Int))) (or (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_337) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (not (= (let ((.cse0 (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4))) (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) .cse0 (select v_ArrVal_337 .cse0))) v_ArrVal_337)))) (not (= |c_ULTIMATE.start_main_~t~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|))) is different from false [2023-11-12 00:48:35,596 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:48:35,597 INFO L351 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 45 treesize of output 50 [2023-11-12 00:48:35,627 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-12 00:48:35,638 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 98 [2023-11-12 00:48:35,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:48:35,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620014938] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:48:35,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [245854396] [2023-11-12 00:48:35,714 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-11-12 00:48:35,714 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:48:35,715 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:48:35,715 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:48:35,715 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:48:37,203 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:48:40,296 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1191#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~root~0#1.base| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) 0) 2)) (= |ULTIMATE.start_main_~root~0#1.offset| 0) (= |ULTIMATE.start_main_~pred~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) 0) 3)) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) 0) 1)) (exists ((|v_ULTIMATE.start_main_~p~0#1.offset_38| Int) (|v_#memory_$Pointer$.offset_107| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~p~0#1.base_42| Int) (|v_#memory_$Pointer$.base_109| (Array Int (Array Int Int))) (|v_#memory_int_137| (Array Int (Array Int Int)))) (and (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_109| |v_ULTIMATE.start_main_~p~0#1.base_42| (store (select |v_#memory_$Pointer$.base_109| |v_ULTIMATE.start_main_~p~0#1.base_42|) |v_ULTIMATE.start_main_~p~0#1.offset_38| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~p~0#1.base_42|) |v_ULTIMATE.start_main_~p~0#1.offset_38|)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_107| |v_ULTIMATE.start_main_~p~0#1.base_42| (store (select |v_#memory_$Pointer$.offset_107| |v_ULTIMATE.start_main_~p~0#1.base_42|) |v_ULTIMATE.start_main_~p~0#1.offset_38| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~p~0#1.base_42|) |v_ULTIMATE.start_main_~p~0#1.offset_38|)))) (= |#memory_int| (store |v_#memory_int_137| |v_ULTIMATE.start_main_~p~0#1.base_42| (store (select |v_#memory_int_137| |v_ULTIMATE.start_main_~p~0#1.base_42|) |v_ULTIMATE.start_main_~p~0#1.offset_38| 3))))) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_main_~p~0#1.base|) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (= |ULTIMATE.start_main_~pred~0#1.base| 0) (= |ULTIMATE.start_main_~n~0#1.offset| 0))' at error location [2023-11-12 00:48:40,296 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:48:40,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:48:40,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-11-12 00:48:40,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461344990] [2023-11-12 00:48:40,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:48:40,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-12 00:48:40,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:40,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-12 00:48:40,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=883, Unknown=1, NotChecked=60, Total=1056 [2023-11-12 00:48:40,299 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:41,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:41,328 INFO L93 Difference]: Finished difference Result 71 states and 85 transitions. [2023-11-12 00:48:41,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 00:48:41,329 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-12 00:48:41,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:41,330 INFO L225 Difference]: With dead ends: 71 [2023-11-12 00:48:41,330 INFO L226 Difference]: Without dead ends: 65 [2023-11-12 00:48:41,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=173, Invalid=1236, Unknown=1, NotChecked=72, Total=1482 [2023-11-12 00:48:41,332 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 95 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:41,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 166 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 181 Invalid, 0 Unknown, 59 Unchecked, 0.9s Time] [2023-11-12 00:48:41,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-12 00:48:41,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 53. [2023-11-12 00:48:41,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.25) internal successors, (65), 52 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:41,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2023-11-12 00:48:41,350 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 27 [2023-11-12 00:48:41,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:41,352 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2023-11-12 00:48:41,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:41,353 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2023-11-12 00:48:41,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-12 00:48:41,358 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:41,359 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:48:41,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87dccc93-4ef3-44c6-a0b1-abdedb85e8ef/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:48:41,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87dccc93-4ef3-44c6-a0b1-abdedb85e8ef/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 00:48:41,565 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:48:41,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:41,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1305217187, now seen corresponding path program 1 times [2023-11-12 00:48:41,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:41,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503409317] [2023-11-12 00:48:41,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:41,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:41,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:42,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:48:42,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:42,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503409317] [2023-11-12 00:48:42,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503409317] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:48:42,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640648413] [2023-11-12 00:48:42,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:42,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:48:42,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87dccc93-4ef3-44c6-a0b1-abdedb85e8ef/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:48:42,351 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87dccc93-4ef3-44c6-a0b1-abdedb85e8ef/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:48:42,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87dccc93-4ef3-44c6-a0b1-abdedb85e8ef/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:48:42,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:42,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-12 00:48:42,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:48:42,521 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-12 00:48:42,579 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-12 00:48:42,579 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-12 00:48:42,611 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2023-11-12 00:48:42,617 INFO L351 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 [2023-11-12 00:48:42,668 INFO L322 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-12 00:48:42,669 INFO L351 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 57 [2023-11-12 00:48:42,673 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-11-12 00:48:42,677 INFO L351 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 32 treesize of output 19 [2023-11-12 00:48:42,731 INFO L351 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 31 treesize of output 19 [2023-11-12 00:48:42,735 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 19 treesize of output 11 [2023-11-12 00:48:42,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:48:42,745 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:48:42,786 INFO L351 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 79 treesize of output 57 [2023-11-12 00:48:42,795 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (and (forall ((v_ArrVal_439 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_439) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0) |c_ULTIMATE.start_main_~p~0#1.base|)) (forall ((v_ArrVal_441 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_441) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0) |c_ULTIMATE.start_main_~p~0#1.offset|)))) is different from false [2023-11-12 00:48:42,817 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:48:42,818 INFO L351 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-11-12 00:48:42,826 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:48:42,826 INFO L351 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 36 treesize of output 35 [2023-11-12 00:48:42,839 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-12 00:48:42,845 INFO L322 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-11-12 00:48:42,846 INFO L351 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 1 [2023-11-12 00:48:42,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-11-12 00:48:42,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640648413] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:48:42,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [308372055] [2023-11-12 00:48:43,002 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-11-12 00:48:43,003 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:48:43,003 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:48:43,004 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:48:43,004 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:48:44,711 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:48:47,314 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1565#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~root~0#1.base| 0) (= |ULTIMATE.start_main_~root~0#1.offset| 0) (= |ULTIMATE.start_main_~pred~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset|) 3)) (= |ULTIMATE.start_main_~pred~0#1.base| 0) (= |ULTIMATE.start_main_~n~0#1.offset| 0))' at error location [2023-11-12 00:48:47,314 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:48:47,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:48:47,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 16 [2023-11-12 00:48:47,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691416134] [2023-11-12 00:48:47,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:48:47,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-12 00:48:47,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:47,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-12 00:48:47,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=762, Unknown=1, NotChecked=56, Total=930 [2023-11-12 00:48:47,317 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:49,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:49,456 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2023-11-12 00:48:49,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 00:48:49,457 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-11-12 00:48:49,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:49,458 INFO L225 Difference]: With dead ends: 73 [2023-11-12 00:48:49,458 INFO L226 Difference]: Without dead ends: 69 [2023-11-12 00:48:49,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=179, Invalid=1156, Unknown=1, NotChecked=70, Total=1406 [2023-11-12 00:48:49,460 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 159 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:49,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 171 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 292 Invalid, 0 Unknown, 75 Unchecked, 1.9s Time] [2023-11-12 00:48:49,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-12 00:48:49,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 57. [2023-11-12 00:48:49,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.25) internal successors, (70), 56 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) [2023-11-12 00:48:49,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2023-11-12 00:48:49,469 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 29 [2023-11-12 00:48:49,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:49,470 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2023-11-12 00:48:49,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:49,470 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2023-11-12 00:48:49,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-12 00:48:49,471 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:49,471 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:48:49,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87dccc93-4ef3-44c6-a0b1-abdedb85e8ef/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-12 00:48:49,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87dccc93-4ef3-44c6-a0b1-abdedb85e8ef/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-12 00:48:49,678 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:48:49,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:49,678 INFO L85 PathProgramCache]: Analyzing trace with hash 824648879, now seen corresponding path program 2 times [2023-11-12 00:48:49,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:49,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524927866] [2023-11-12 00:48:49,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:49,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:49,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:50,317 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:48:50,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:50,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524927866] [2023-11-12 00:48:50,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524927866] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:48:50,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377090054] [2023-11-12 00:48:50,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:48:50,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:48:50,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87dccc93-4ef3-44c6-a0b1-abdedb85e8ef/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:48:50,323 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87dccc93-4ef3-44c6-a0b1-abdedb85e8ef/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:48:50,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87dccc93-4ef3-44c6-a0b1-abdedb85e8ef/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:48:50,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 00:48:50,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:48:50,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-12 00:48:50,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:48:50,770 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-12 00:48:50,825 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-12 00:48:50,836 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-12 00:48:50,837 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-12 00:48:50,870 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-12 00:48:50,888 INFO L351 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 16 treesize of output 11 [2023-11-12 00:48:50,932 INFO L351 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 16 treesize of output 11 [2023-11-12 00:48:50,985 INFO L322 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-11-12 00:48:50,985 INFO L351 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 1 case distinctions, treesize of input 19 treesize of output 22 [2023-11-12 00:48:51,128 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:48:51,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:48:51,216 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.base_61| Int) (v_ArrVal_572 (Array Int Int))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_572))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_61| (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_61|) |c_ULTIMATE.start_main_~t~0#1.offset| 3))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse0 2) (= .cse0 3)))) is different from false [2023-11-12 00:48:51,235 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.base_61| Int) (v_ArrVal_572 (Array Int Int))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_572))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_61| (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_61|) 0 3))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse0 3) (= .cse0 2)))) is different from false [2023-11-12 00:48:51,264 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_569 (Array Int Int)) (|v_ULTIMATE.start_main_~p~0#1.base_61| Int) (v_ArrVal_572 (Array Int Int))) (let ((.cse0 (select (select (let ((.cse2 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_569) |c_ULTIMATE.start_main_~t~0#1.base| v_ArrVal_572))) (store .cse2 |v_ULTIMATE.start_main_~p~0#1.base_61| (store (select .cse2 |v_ULTIMATE.start_main_~p~0#1.base_61|) 0 3))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse0 3) (not (= (let ((.cse1 (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4))) (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) .cse1 (select v_ArrVal_569 .cse1))) v_ArrVal_569)) (= .cse0 2)))) is different from false [2023-11-12 00:48:51,331 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:48:51,332 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7629 treesize of output 7411 [2023-11-12 00:48:51,549 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1219 treesize of output 1155 [2023-11-12 00:49:00,643 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2023-11-12 00:49:00,793 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 185 [2023-11-12 00:49:00,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:49:00,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:49:00,819 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 00:49:00,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:49:00,899 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:49:00,900 INFO L351 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 4017 treesize of output 3879 [2023-11-12 00:49:01,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:49:01,312 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 201 treesize of output 193 [2023-11-12 00:49:01,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:49:01,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:49:01,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:49:01,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:49:01,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:49:01,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:49:01,403 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-12 00:49:01,403 INFO L351 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 242 treesize of output 1 [2023-11-12 00:49:01,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2023-11-12 00:49:01,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377090054] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:49:01,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [632416101] [2023-11-12 00:49:01,500 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-11-12 00:49:01,500 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:49:01,500 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:49:01,501 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:49:01,501 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:49:02,797 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:49:06,509 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1968#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~root~0#1.base| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) 0) 2)) (= |ULTIMATE.start_main_~root~0#1.offset| 0) (= |ULTIMATE.start_main_~pred~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) 0) 3)) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) 0) 1)) (exists ((|v_#memory_$Pointer$.offset_140| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~p~0#1.base_67| Int) (|v_#memory_int_177| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~p~0#1.offset_62| Int) (|v_#memory_$Pointer$.base_142| (Array Int (Array Int Int)))) (and (= (store |v_#memory_$Pointer$.base_142| |v_ULTIMATE.start_main_~p~0#1.base_67| (store (select |v_#memory_$Pointer$.base_142| |v_ULTIMATE.start_main_~p~0#1.base_67|) |v_ULTIMATE.start_main_~p~0#1.offset_62| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~p~0#1.base_67|) |v_ULTIMATE.start_main_~p~0#1.offset_62|))) |#memory_$Pointer$.base|) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_140| |v_ULTIMATE.start_main_~p~0#1.base_67| (store (select |v_#memory_$Pointer$.offset_140| |v_ULTIMATE.start_main_~p~0#1.base_67|) |v_ULTIMATE.start_main_~p~0#1.offset_62| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~p~0#1.base_67|) |v_ULTIMATE.start_main_~p~0#1.offset_62|)))) (or (= |ULTIMATE.start_main_~t~0#1.offset| 0) (= |v_ULTIMATE.start_main_~p~0#1.offset_62| 0)) (= |#memory_int| (store |v_#memory_int_177| |v_ULTIMATE.start_main_~p~0#1.base_67| (store (select |v_#memory_int_177| |v_ULTIMATE.start_main_~p~0#1.base_67|) |v_ULTIMATE.start_main_~p~0#1.offset_62| 3))))) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_main_~p~0#1.base|) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (= |ULTIMATE.start_main_~pred~0#1.base| 0) (= |ULTIMATE.start_main_~n~0#1.offset| 0))' at error location [2023-11-12 00:49:06,509 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:49:06,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:49:06,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2023-11-12 00:49:06,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634936649] [2023-11-12 00:49:06,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:49:06,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-12 00:49:06,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:06,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-12 00:49:06,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1256, Unknown=3, NotChecked=222, Total=1640 [2023-11-12 00:49:06,512 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:49:08,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:08,203 INFO L93 Difference]: Finished difference Result 101 states and 122 transitions. [2023-11-12 00:49:08,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-12 00:49:08,204 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-11-12 00:49:08,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:08,205 INFO L225 Difference]: With dead ends: 101 [2023-11-12 00:49:08,205 INFO L226 Difference]: Without dead ends: 97 [2023-11-12 00:49:08,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=370, Invalid=2501, Unknown=3, NotChecked=318, Total=3192 [2023-11-12 00:49:08,207 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 107 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 273 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:08,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 230 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 321 Invalid, 0 Unknown, 273 Unchecked, 1.0s Time] [2023-11-12 00:49:08,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-12 00:49:08,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 66. [2023-11-12 00:49:08,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.2461538461538462) internal successors, (81), 65 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:49:08,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2023-11-12 00:49:08,222 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 31 [2023-11-12 00:49:08,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:08,223 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2023-11-12 00:49:08,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:49:08,223 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2023-11-12 00:49:08,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-12 00:49:08,224 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:08,224 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:08,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87dccc93-4ef3-44c6-a0b1-abdedb85e8ef/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0