./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/heapsort.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_927d52af-7171-41c2-b9c5-d47b12915908/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927d52af-7171-41c2-b9c5-d47b12915908/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_927d52af-7171-41c2-b9c5-d47b12915908/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927d52af-7171-41c2-b9c5-d47b12915908/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invgen/heapsort.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927d52af-7171-41c2-b9c5-d47b12915908/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_927d52af-7171-41c2-b9c5-d47b12915908/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 8e7c8e5dc2a9e8f11b25d1bb9948f05f37b9553e3dc9f8bd8213088dea43cb37 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:59:15,778 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:59:15,882 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927d52af-7171-41c2-b9c5-d47b12915908/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:59:15,888 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:59:15,889 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:59:15,935 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:59:15,936 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:59:15,938 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:59:15,939 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:59:15,944 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:59:15,945 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:59:15,946 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:59:15,947 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:59:15,949 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:59:15,949 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:59:15,950 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:59:15,950 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:59:15,951 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:59:15,951 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:59:15,952 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:59:15,952 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:59:15,953 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:59:15,954 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:59:15,955 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:59:15,955 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:59:15,956 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:59:15,956 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:59:15,957 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:59:15,957 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:59:15,957 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:59:15,959 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:59:15,959 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:59:15,960 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:59:15,960 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:59:15,960 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:59:15,960 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:59:15,961 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:59:15,961 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:59:15,961 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:59:15,962 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:59:15,962 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:59:15,962 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:59:15,963 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:59:15,963 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:59:15,964 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:59:15,964 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_927d52af-7171-41c2-b9c5-d47b12915908/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927d52af-7171-41c2-b9c5-d47b12915908/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e7c8e5dc2a9e8f11b25d1bb9948f05f37b9553e3dc9f8bd8213088dea43cb37 [2023-11-12 00:59:16,321 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:59:16,355 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:59:16,358 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:59:16,359 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:59:16,360 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:59:16,362 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927d52af-7171-41c2-b9c5-d47b12915908/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/loop-invgen/heapsort.i [2023-11-12 00:59:19,491 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:59:19,716 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:59:19,717 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927d52af-7171-41c2-b9c5-d47b12915908/sv-benchmarks/c/loop-invgen/heapsort.i [2023-11-12 00:59:19,725 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927d52af-7171-41c2-b9c5-d47b12915908/bin/utaipan-verify-NcY6lQBIFX/data/1f220fd4e/0dbcbe6b93354eb68a44c446bad3329b/FLAG0a299cb7e [2023-11-12 00:59:19,740 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927d52af-7171-41c2-b9c5-d47b12915908/bin/utaipan-verify-NcY6lQBIFX/data/1f220fd4e/0dbcbe6b93354eb68a44c446bad3329b [2023-11-12 00:59:19,743 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:59:19,744 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:59:19,746 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:59:19,746 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:59:19,750 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:59:19,751 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:59:19" (1/1) ... [2023-11-12 00:59:19,752 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@eb462e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:19, skipping insertion in model container [2023-11-12 00:59:19,752 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:59:19" (1/1) ... [2023-11-12 00:59:19,779 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:59:19,926 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_927d52af-7171-41c2-b9c5-d47b12915908/sv-benchmarks/c/loop-invgen/heapsort.i[893,906] [2023-11-12 00:59:19,945 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:59:19,955 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:59:19,968 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_927d52af-7171-41c2-b9c5-d47b12915908/sv-benchmarks/c/loop-invgen/heapsort.i[893,906] [2023-11-12 00:59:19,977 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:59:19,992 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:59:19,992 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:19 WrapperNode [2023-11-12 00:59:19,993 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:59:19,994 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:59:19,994 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:59:19,994 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:59:20,002 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:19" (1/1) ... [2023-11-12 00:59:20,009 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:19" (1/1) ... [2023-11-12 00:59:20,030 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 79 [2023-11-12 00:59:20,030 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:59:20,031 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:59:20,031 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:59:20,032 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:59:20,040 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:19" (1/1) ... [2023-11-12 00:59:20,041 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:19" (1/1) ... [2023-11-12 00:59:20,043 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:19" (1/1) ... [2023-11-12 00:59:20,043 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:19" (1/1) ... [2023-11-12 00:59:20,047 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:19" (1/1) ... [2023-11-12 00:59:20,051 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:19" (1/1) ... [2023-11-12 00:59:20,052 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:19" (1/1) ... [2023-11-12 00:59:20,053 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:19" (1/1) ... [2023-11-12 00:59:20,056 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:59:20,057 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:59:20,057 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:59:20,057 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:59:20,058 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:19" (1/1) ... [2023-11-12 00:59:20,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:59:20,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927d52af-7171-41c2-b9c5-d47b12915908/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:20,096 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927d52af-7171-41c2-b9c5-d47b12915908/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:59:20,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927d52af-7171-41c2-b9c5-d47b12915908/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:59:20,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:59:20,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:59:20,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:59:20,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:59:20,126 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-12 00:59:20,126 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-12 00:59:20,192 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:59:20,196 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:59:20,476 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:59:20,539 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:59:20,539 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 00:59:20,542 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:59:20 BoogieIcfgContainer [2023-11-12 00:59:20,542 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:59:20,545 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:59:20,545 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:59:20,548 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:59:20,549 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:59:19" (1/3) ... [2023-11-12 00:59:20,550 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@747e2a9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:59:20, skipping insertion in model container [2023-11-12 00:59:20,550 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:19" (2/3) ... [2023-11-12 00:59:20,550 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@747e2a9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:59:20, skipping insertion in model container [2023-11-12 00:59:20,550 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:59:20" (3/3) ... [2023-11-12 00:59:20,552 INFO L112 eAbstractionObserver]: Analyzing ICFG heapsort.i [2023-11-12 00:59:20,573 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:59:20,573 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:59:20,628 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:59:20,636 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;@226cdd38, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:59:20,636 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:59:20,641 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-12 00:59:20,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-12 00:59:20,649 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:20,649 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:20,650 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:20,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:20,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1905704588, now seen corresponding path program 1 times [2023-11-12 00:59:20,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:20,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146446623] [2023-11-12 00:59:20,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:20,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:20,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:21,140 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 00:59:21,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:21,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146446623] [2023-11-12 00:59:21,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146446623] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:21,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:21,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:59:21,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343110827] [2023-11-12 00:59:21,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:21,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:59:21,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:21,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:59:21,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:59:21,186 INFO L87 Difference]: Start difference. First operand has 34 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:59:21,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:21,365 INFO L93 Difference]: Finished difference Result 92 states and 172 transitions. [2023-11-12 00:59:21,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:59:21,368 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-12 00:59:21,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:21,377 INFO L225 Difference]: With dead ends: 92 [2023-11-12 00:59:21,378 INFO L226 Difference]: Without dead ends: 57 [2023-11-12 00:59:21,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:59:21,386 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 19 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:21,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 140 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:59:21,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-12 00:59:21,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 36. [2023-11-12 00:59:21,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-12 00:59:21,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2023-11-12 00:59:21,444 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 9 [2023-11-12 00:59:21,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:21,445 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2023-11-12 00:59:21,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:59:21,446 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2023-11-12 00:59:21,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-12 00:59:21,447 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:21,447 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:21,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:59:21,448 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:21,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:21,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1900967819, now seen corresponding path program 1 times [2023-11-12 00:59:21,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:21,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327215617] [2023-11-12 00:59:21,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:21,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:21,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:21,649 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 00:59:21,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:21,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327215617] [2023-11-12 00:59:21,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327215617] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:21,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:21,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:59:21,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962756217] [2023-11-12 00:59:21,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:21,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:59:21,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:21,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:59:21,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:59:21,661 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:59:21,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:21,760 INFO L93 Difference]: Finished difference Result 43 states and 58 transitions. [2023-11-12 00:59:21,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:59:21,761 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-12 00:59:21,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:21,763 INFO L225 Difference]: With dead ends: 43 [2023-11-12 00:59:21,763 INFO L226 Difference]: Without dead ends: 41 [2023-11-12 00:59:21,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:59:21,766 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 14 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:21,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 122 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:59:21,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-12 00:59:21,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2023-11-12 00:59:21,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-12 00:59:21,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 55 transitions. [2023-11-12 00:59:21,818 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 55 transitions. Word has length 9 [2023-11-12 00:59:21,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:21,819 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 55 transitions. [2023-11-12 00:59:21,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:59:21,819 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 55 transitions. [2023-11-12 00:59:21,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-12 00:59:21,823 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:21,823 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:21,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:59:21,824 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:21,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:21,824 INFO L85 PathProgramCache]: Analyzing trace with hash -504724405, now seen corresponding path program 1 times [2023-11-12 00:59:21,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:21,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312529665] [2023-11-12 00:59:21,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:21,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:21,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:22,077 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 00:59:22,077 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:22,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312529665] [2023-11-12 00:59:22,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312529665] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:22,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:22,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:59:22,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958821861] [2023-11-12 00:59:22,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:22,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:59:22,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:22,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:59:22,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:59:22,081 INFO L87 Difference]: Start difference. First operand 40 states and 55 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:59:22,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:22,342 INFO L93 Difference]: Finished difference Result 72 states and 104 transitions. [2023-11-12 00:59:22,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:59:22,343 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-12 00:59:22,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:22,345 INFO L225 Difference]: With dead ends: 72 [2023-11-12 00:59:22,346 INFO L226 Difference]: Without dead ends: 70 [2023-11-12 00:59:22,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:59:22,348 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 25 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:22,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 157 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:59:22,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-12 00:59:22,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2023-11-12 00:59:22,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 26 states have call successors, (26), 4 states have call predecessors, (26), 4 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-12 00:59:22,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 95 transitions. [2023-11-12 00:59:22,377 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 95 transitions. Word has length 9 [2023-11-12 00:59:22,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:22,378 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 95 transitions. [2023-11-12 00:59:22,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:59:22,379 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 95 transitions. [2023-11-12 00:59:22,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-12 00:59:22,380 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:22,380 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:22,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:59:22,382 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:22,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:22,384 INFO L85 PathProgramCache]: Analyzing trace with hash -742689088, now seen corresponding path program 1 times [2023-11-12 00:59:22,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:22,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426375805] [2023-11-12 00:59:22,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:22,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:22,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:22,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:59:22,554 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:22,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426375805] [2023-11-12 00:59:22,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426375805] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:22,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:22,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:59:22,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111309153] [2023-11-12 00:59:22,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:22,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:59:22,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:22,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:59:22,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:59:22,559 INFO L87 Difference]: Start difference. First operand 65 states and 95 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:59:22,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:22,749 INFO L93 Difference]: Finished difference Result 71 states and 100 transitions. [2023-11-12 00:59:22,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:59:22,750 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-11-12 00:59:22,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:22,752 INFO L225 Difference]: With dead ends: 71 [2023-11-12 00:59:22,752 INFO L226 Difference]: Without dead ends: 69 [2023-11-12 00:59:22,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:59:22,754 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 26 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:22,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 258 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:59:22,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-12 00:59:22,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-11-12 00:59:22,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 states have internal predecessors, (46), 26 states have call successors, (26), 5 states have call predecessors, (26), 5 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-12 00:59:22,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 98 transitions. [2023-11-12 00:59:22,779 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 98 transitions. Word has length 14 [2023-11-12 00:59:22,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:22,780 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 98 transitions. [2023-11-12 00:59:22,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:59:22,780 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 98 transitions. [2023-11-12 00:59:22,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-12 00:59:22,782 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:22,782 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:22,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:59:22,783 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:22,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:22,784 INFO L85 PathProgramCache]: Analyzing trace with hash -361326625, now seen corresponding path program 1 times [2023-11-12 00:59:22,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:22,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351227404] [2023-11-12 00:59:22,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:22,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:22,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:22,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:59:22,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:22,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351227404] [2023-11-12 00:59:22,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351227404] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:22,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:22,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:59:22,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609962534] [2023-11-12 00:59:22,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:22,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:59:22,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:22,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:59:22,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:59:22,938 INFO L87 Difference]: Start difference. First operand 69 states and 98 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:59:23,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:23,057 INFO L93 Difference]: Finished difference Result 75 states and 103 transitions. [2023-11-12 00:59:23,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:59:23,058 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-11-12 00:59:23,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:23,064 INFO L225 Difference]: With dead ends: 75 [2023-11-12 00:59:23,064 INFO L226 Difference]: Without dead ends: 73 [2023-11-12 00:59:23,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:59:23,072 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 14 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:23,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 119 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:59:23,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-12 00:59:23,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2023-11-12 00:59:23,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 40 states have (on average 1.225) internal successors, (49), 40 states have internal predecessors, (49), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-12 00:59:23,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 101 transitions. [2023-11-12 00:59:23,123 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 101 transitions. Word has length 14 [2023-11-12 00:59:23,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:23,125 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 101 transitions. [2023-11-12 00:59:23,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:59:23,125 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 101 transitions. [2023-11-12 00:59:23,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-12 00:59:23,127 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:23,127 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:23,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 00:59:23,127 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:23,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:23,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1770883895, now seen corresponding path program 1 times [2023-11-12 00:59:23,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:23,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915002276] [2023-11-12 00:59:23,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:23,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:23,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:23,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:59:23,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:23,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915002276] [2023-11-12 00:59:23,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915002276] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:23,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:23,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:59:23,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560246415] [2023-11-12 00:59:23,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:23,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:59:23,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:23,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:59:23,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:59:23,228 INFO L87 Difference]: Start difference. First operand 73 states and 101 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:59:23,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:23,399 INFO L93 Difference]: Finished difference Result 79 states and 106 transitions. [2023-11-12 00:59:23,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:59:23,399 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-11-12 00:59:23,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:23,401 INFO L225 Difference]: With dead ends: 79 [2023-11-12 00:59:23,401 INFO L226 Difference]: Without dead ends: 77 [2023-11-12 00:59:23,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:59:23,403 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 15 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:23,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 139 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:59:23,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-12 00:59:23,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2023-11-12 00:59:23,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-12 00:59:23,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 104 transitions. [2023-11-12 00:59:23,426 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 104 transitions. Word has length 14 [2023-11-12 00:59:23,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:23,426 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 104 transitions. [2023-11-12 00:59:23,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:59:23,427 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 104 transitions. [2023-11-12 00:59:23,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-12 00:59:23,428 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:23,428 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:23,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 00:59:23,429 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:23,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:23,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1597699484, now seen corresponding path program 1 times [2023-11-12 00:59:23,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:23,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917846250] [2023-11-12 00:59:23,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:23,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:23,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:23,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:59:23,549 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:23,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917846250] [2023-11-12 00:59:23,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917846250] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:23,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:23,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 00:59:23,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175561911] [2023-11-12 00:59:23,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:23,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:59:23,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:23,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:59:23,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:59:23,553 INFO L87 Difference]: Start difference. First operand 77 states and 104 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:59:23,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:23,803 INFO L93 Difference]: Finished difference Result 118 states and 165 transitions. [2023-11-12 00:59:23,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:59:23,804 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-11-12 00:59:23,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:23,807 INFO L225 Difference]: With dead ends: 118 [2023-11-12 00:59:23,808 INFO L226 Difference]: Without dead ends: 116 [2023-11-12 00:59:23,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:59:23,810 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 28 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:23,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 191 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:59:23,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-11-12 00:59:23,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 101. [2023-11-12 00:59:23,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 55 states have internal predecessors, (64), 38 states have call successors, (38), 9 states have call predecessors, (38), 9 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) [2023-11-12 00:59:23,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 140 transitions. [2023-11-12 00:59:23,848 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 140 transitions. Word has length 14 [2023-11-12 00:59:23,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:23,849 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 140 transitions. [2023-11-12 00:59:23,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:59:23,849 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 140 transitions. [2023-11-12 00:59:23,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-12 00:59:23,851 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:23,852 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:23,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 00:59:23,852 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:23,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:23,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1057383317, now seen corresponding path program 1 times [2023-11-12 00:59:23,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:23,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485739926] [2023-11-12 00:59:23,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:23,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:23,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:23,971 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 00:59:23,972 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:23,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485739926] [2023-11-12 00:59:23,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485739926] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:23,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:23,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:59:23,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124397320] [2023-11-12 00:59:23,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:23,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:59:23,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:23,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:59:23,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:59:23,975 INFO L87 Difference]: Start difference. First operand 101 states and 140 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-12 00:59:24,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:24,173 INFO L93 Difference]: Finished difference Result 153 states and 225 transitions. [2023-11-12 00:59:24,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:59:24,174 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2023-11-12 00:59:24,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:24,178 INFO L225 Difference]: With dead ends: 153 [2023-11-12 00:59:24,178 INFO L226 Difference]: Without dead ends: 151 [2023-11-12 00:59:24,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:59:24,180 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 18 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:24,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 177 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:59:24,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-11-12 00:59:24,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 119. [2023-11-12 00:59:24,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 64 states have (on average 1.265625) internal successors, (81), 68 states have internal predecessors, (81), 44 states have call successors, (44), 10 states have call predecessors, (44), 10 states have return successors, (44), 40 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-12 00:59:24,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 169 transitions. [2023-11-12 00:59:24,221 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 169 transitions. Word has length 21 [2023-11-12 00:59:24,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:24,222 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 169 transitions. [2023-11-12 00:59:24,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-12 00:59:24,222 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 169 transitions. [2023-11-12 00:59:24,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-12 00:59:24,224 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:24,224 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:24,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 00:59:24,224 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:24,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:24,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1020128255, now seen corresponding path program 1 times [2023-11-12 00:59:24,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:24,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212784481] [2023-11-12 00:59:24,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:24,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:24,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:24,349 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 00:59:24,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:24,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212784481] [2023-11-12 00:59:24,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212784481] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:24,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:24,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 00:59:24,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172698427] [2023-11-12 00:59:24,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:24,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:59:24,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:24,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:59:24,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:59:24,355 INFO L87 Difference]: Start difference. First operand 119 states and 169 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-12 00:59:24,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:24,537 INFO L93 Difference]: Finished difference Result 126 states and 175 transitions. [2023-11-12 00:59:24,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:59:24,538 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2023-11-12 00:59:24,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:24,541 INFO L225 Difference]: With dead ends: 126 [2023-11-12 00:59:24,541 INFO L226 Difference]: Without dead ends: 124 [2023-11-12 00:59:24,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-11-12 00:59:24,548 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 27 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:24,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 130 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:59:24,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-11-12 00:59:24,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 83. [2023-11-12 00:59:24,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 49 states have (on average 1.183673469387755) internal successors, (58), 51 states have internal predecessors, (58), 23 states have call successors, (23), 10 states have call predecessors, (23), 10 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-12 00:59:24,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 104 transitions. [2023-11-12 00:59:24,581 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 104 transitions. Word has length 23 [2023-11-12 00:59:24,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:24,581 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 104 transitions. [2023-11-12 00:59:24,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-12 00:59:24,582 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 104 transitions. [2023-11-12 00:59:24,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-12 00:59:24,592 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:24,592 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:24,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 00:59:24,592 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:24,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:24,593 INFO L85 PathProgramCache]: Analyzing trace with hash 970924607, now seen corresponding path program 1 times [2023-11-12 00:59:24,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:24,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941105437] [2023-11-12 00:59:24,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:24,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:24,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:24,704 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 00:59:24,704 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:24,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941105437] [2023-11-12 00:59:24,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941105437] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:24,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:24,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 00:59:24,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753509617] [2023-11-12 00:59:24,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:24,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:59:24,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:24,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:59:24,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:59:24,706 INFO L87 Difference]: Start difference. First operand 83 states and 104 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-12 00:59:24,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:24,897 INFO L93 Difference]: Finished difference Result 98 states and 123 transitions. [2023-11-12 00:59:24,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:59:24,898 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2023-11-12 00:59:24,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:24,899 INFO L225 Difference]: With dead ends: 98 [2023-11-12 00:59:24,900 INFO L226 Difference]: Without dead ends: 96 [2023-11-12 00:59:24,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-12 00:59:24,901 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 34 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:24,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 200 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:59:24,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-11-12 00:59:24,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 87. [2023-11-12 00:59:24,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 54 states have internal predecessors, (61), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-12 00:59:24,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 107 transitions. [2023-11-12 00:59:24,930 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 107 transitions. Word has length 26 [2023-11-12 00:59:24,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:24,930 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 107 transitions. [2023-11-12 00:59:24,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-12 00:59:24,931 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 107 transitions. [2023-11-12 00:59:24,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-12 00:59:24,932 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:24,932 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:24,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-12 00:59:24,933 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:24,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:24,933 INFO L85 PathProgramCache]: Analyzing trace with hash 606224610, now seen corresponding path program 1 times [2023-11-12 00:59:24,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:24,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444702443] [2023-11-12 00:59:24,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:24,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:24,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:25,076 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-12 00:59:25,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:25,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444702443] [2023-11-12 00:59:25,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444702443] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:25,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:25,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-12 00:59:25,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026132202] [2023-11-12 00:59:25,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:25,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 00:59:25,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:25,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 00:59:25,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:59:25,079 INFO L87 Difference]: Start difference. First operand 87 states and 107 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:59:25,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:25,270 INFO L93 Difference]: Finished difference Result 101 states and 125 transitions. [2023-11-12 00:59:25,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:59:25,271 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 35 [2023-11-12 00:59:25,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:25,273 INFO L225 Difference]: With dead ends: 101 [2023-11-12 00:59:25,273 INFO L226 Difference]: Without dead ends: 99 [2023-11-12 00:59:25,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-11-12 00:59:25,274 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 34 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:25,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 167 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:59:25,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-11-12 00:59:25,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 91. [2023-11-12 00:59:25,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 57 states have internal predecessors, (64), 23 states have call successors, (23), 12 states have call predecessors, (23), 12 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-12 00:59:25,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 110 transitions. [2023-11-12 00:59:25,305 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 110 transitions. Word has length 35 [2023-11-12 00:59:25,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:25,305 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 110 transitions. [2023-11-12 00:59:25,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:59:25,305 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 110 transitions. [2023-11-12 00:59:25,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-12 00:59:25,307 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:25,307 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 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 00:59:25,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-12 00:59:25,308 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:25,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:25,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1230275415, now seen corresponding path program 1 times [2023-11-12 00:59:25,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:25,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877949640] [2023-11-12 00:59:25,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:25,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:25,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:25,440 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-12 00:59:25,441 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:25,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877949640] [2023-11-12 00:59:25,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877949640] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:25,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:25,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:59:25,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031487405] [2023-11-12 00:59:25,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:25,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:59:25,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:25,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:59:25,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:59:25,443 INFO L87 Difference]: Start difference. First operand 91 states and 110 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-12 00:59:25,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:25,646 INFO L93 Difference]: Finished difference Result 163 states and 228 transitions. [2023-11-12 00:59:25,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:59:25,647 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 42 [2023-11-12 00:59:25,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:25,649 INFO L225 Difference]: With dead ends: 163 [2023-11-12 00:59:25,649 INFO L226 Difference]: Without dead ends: 161 [2023-11-12 00:59:25,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:59:25,650 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 33 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:25,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 187 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:59:25,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-11-12 00:59:25,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 145. [2023-11-12 00:59:25,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 79 states have (on average 1.2278481012658229) internal successors, (97), 84 states have internal predecessors, (97), 51 states have call successors, (51), 14 states have call predecessors, (51), 14 states have return successors, (51), 46 states have call predecessors, (51), 51 states have call successors, (51) [2023-11-12 00:59:25,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 199 transitions. [2023-11-12 00:59:25,713 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 199 transitions. Word has length 42 [2023-11-12 00:59:25,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:25,713 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 199 transitions. [2023-11-12 00:59:25,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-12 00:59:25,714 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 199 transitions. [2023-11-12 00:59:25,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-12 00:59:25,715 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:25,716 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:25,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-12 00:59:25,716 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:25,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:25,717 INFO L85 PathProgramCache]: Analyzing trace with hash -653270493, now seen corresponding path program 1 times [2023-11-12 00:59:25,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:25,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068085662] [2023-11-12 00:59:25,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:25,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:25,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:25,847 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-11-12 00:59:25,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:25,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068085662] [2023-11-12 00:59:25,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068085662] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:25,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:25,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 00:59:25,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807229397] [2023-11-12 00:59:25,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:25,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:59:25,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:25,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:59:25,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:59:25,850 INFO L87 Difference]: Start difference. First operand 145 states and 199 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-12 00:59:26,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:26,064 INFO L93 Difference]: Finished difference Result 188 states and 269 transitions. [2023-11-12 00:59:26,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 00:59:26,065 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 56 [2023-11-12 00:59:26,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:26,067 INFO L225 Difference]: With dead ends: 188 [2023-11-12 00:59:26,067 INFO L226 Difference]: Without dead ends: 186 [2023-11-12 00:59:26,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-11-12 00:59:26,069 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 36 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:26,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 175 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:59:26,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2023-11-12 00:59:26,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 84. [2023-11-12 00:59:26,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 52 states have internal predecessors, (59), 21 states have call successors, (21), 11 states have call predecessors, (21), 11 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2023-11-12 00:59:26,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 101 transitions. [2023-11-12 00:59:26,110 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 101 transitions. Word has length 56 [2023-11-12 00:59:26,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:26,110 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 101 transitions. [2023-11-12 00:59:26,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-12 00:59:26,111 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 101 transitions. [2023-11-12 00:59:26,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-12 00:59:26,112 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:26,113 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:26,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-12 00:59:26,113 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:26,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:26,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1781169230, now seen corresponding path program 1 times [2023-11-12 00:59:26,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:26,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355071405] [2023-11-12 00:59:26,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:26,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:26,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:26,260 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-11-12 00:59:26,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:26,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355071405] [2023-11-12 00:59:26,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355071405] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:59:26,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317702090] [2023-11-12 00:59:26,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:26,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:26,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927d52af-7171-41c2-b9c5-d47b12915908/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:26,268 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927d52af-7171-41c2-b9c5-d47b12915908/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:59:26,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927d52af-7171-41c2-b9c5-d47b12915908/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:59:26,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:26,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 00:59:26,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:59:26,541 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-11-12 00:59:26,542 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:59:26,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317702090] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:26,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:59:26,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2023-11-12 00:59:26,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805015671] [2023-11-12 00:59:26,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:26,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:59:26,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:26,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:59:26,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:59:26,546 INFO L87 Difference]: Start difference. First operand 84 states and 101 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-12 00:59:26,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:26,762 INFO L93 Difference]: Finished difference Result 198 states and 254 transitions. [2023-11-12 00:59:26,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:59:26,770 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 56 [2023-11-12 00:59:26,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:26,772 INFO L225 Difference]: With dead ends: 198 [2023-11-12 00:59:26,772 INFO L226 Difference]: Without dead ends: 116 [2023-11-12 00:59:26,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:59:26,774 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 22 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:26,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 86 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:59:26,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-11-12 00:59:26,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 99. [2023-11-12 00:59:26,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 59 states have internal predecessors, (67), 30 states have call successors, (30), 11 states have call predecessors, (30), 11 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-12 00:59:26,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 127 transitions. [2023-11-12 00:59:26,829 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 127 transitions. Word has length 56 [2023-11-12 00:59:26,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:26,829 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 127 transitions. [2023-11-12 00:59:26,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-12 00:59:26,830 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 127 transitions. [2023-11-12 00:59:26,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-12 00:59:26,831 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:26,832 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:26,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927d52af-7171-41c2-b9c5-d47b12915908/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:59:27,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927d52af-7171-41c2-b9c5-d47b12915908/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-12 00:59:27,038 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:27,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:27,039 INFO L85 PathProgramCache]: Analyzing trace with hash 215528780, now seen corresponding path program 1 times [2023-11-12 00:59:27,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:27,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415072299] [2023-11-12 00:59:27,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:27,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:27,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:27,271 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-11-12 00:59:27,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:27,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415072299] [2023-11-12 00:59:27,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415072299] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:59:27,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684213914] [2023-11-12 00:59:27,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:27,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:27,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927d52af-7171-41c2-b9c5-d47b12915908/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:27,274 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927d52af-7171-41c2-b9c5-d47b12915908/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:59:27,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927d52af-7171-41c2-b9c5-d47b12915908/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:59:27,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:27,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 00:59:27,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:59:27,529 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-11-12 00:59:27,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:59:27,679 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-11-12 00:59:27,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684213914] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:59:27,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1124387709] [2023-11-12 00:59:27,701 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-11-12 00:59:27,701 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:59:27,705 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:59:27,711 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:59:27,711 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:59:30,052 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2023-11-12 00:59:30,057 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:59:30,730 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4890#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-12 00:59:30,730 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:59:30,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:59:30,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-12 00:59:30,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361358516] [2023-11-12 00:59:30,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:59:30,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 00:59:30,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:30,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 00:59:30,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2023-11-12 00:59:30,733 INFO L87 Difference]: Start difference. First operand 99 states and 127 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2023-11-12 00:59:31,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:31,018 INFO L93 Difference]: Finished difference Result 120 states and 151 transitions. [2023-11-12 00:59:31,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 00:59:31,019 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 77 [2023-11-12 00:59:31,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:31,021 INFO L225 Difference]: With dead ends: 120 [2023-11-12 00:59:31,021 INFO L226 Difference]: Without dead ends: 118 [2023-11-12 00:59:31,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 207 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2023-11-12 00:59:31,024 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 30 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:31,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 252 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:59:31,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-11-12 00:59:31,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 98. [2023-11-12 00:59:31,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 59 states have internal predecessors, (67), 27 states have call successors, (27), 12 states have call predecessors, (27), 12 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2023-11-12 00:59:31,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 121 transitions. [2023-11-12 00:59:31,061 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 121 transitions. Word has length 77 [2023-11-12 00:59:31,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:31,062 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 121 transitions. [2023-11-12 00:59:31,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2023-11-12 00:59:31,062 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 121 transitions. [2023-11-12 00:59:31,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-11-12 00:59:31,064 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:31,064 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:31,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927d52af-7171-41c2-b9c5-d47b12915908/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:59:31,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927d52af-7171-41c2-b9c5-d47b12915908/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-12 00:59:31,270 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:31,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:31,271 INFO L85 PathProgramCache]: Analyzing trace with hash 744962560, now seen corresponding path program 1 times [2023-11-12 00:59:31,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:31,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824054457] [2023-11-12 00:59:31,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:31,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:31,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:31,579 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 32 proven. 12 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-12 00:59:31,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:31,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824054457] [2023-11-12 00:59:31,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824054457] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:59:31,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935615461] [2023-11-12 00:59:31,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:31,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:31,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927d52af-7171-41c2-b9c5-d47b12915908/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:31,584 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927d52af-7171-41c2-b9c5-d47b12915908/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:59:31,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927d52af-7171-41c2-b9c5-d47b12915908/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:59:31,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:31,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 00:59:31,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:59:31,769 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 51 proven. 38 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-11-12 00:59:31,770 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:59:31,914 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 51 proven. 38 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-11-12 00:59:31,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935615461] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:59:31,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [976620113] [2023-11-12 00:59:31,919 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-11-12 00:59:31,919 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:59:31,920 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:59:31,920 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:59:31,920 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:59:38,903 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2023-11-12 00:59:38,908 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:59:41,354 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5826#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-12 00:59:41,354 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:59:41,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:59:41,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 13 [2023-11-12 00:59:41,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625331537] [2023-11-12 00:59:41,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:59:41,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 00:59:41,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:41,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 00:59:41,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2023-11-12 00:59:41,358 INFO L87 Difference]: Start difference. First operand 98 states and 121 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 5 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (32), 5 states have call predecessors, (32), 5 states have call successors, (32) [2023-11-12 00:59:42,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:42,091 INFO L93 Difference]: Finished difference Result 235 states and 346 transitions. [2023-11-12 00:59:42,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 00:59:42,092 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 5 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (32), 5 states have call predecessors, (32), 5 states have call successors, (32) Word has length 98 [2023-11-12 00:59:42,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:42,092 INFO L225 Difference]: With dead ends: 235 [2023-11-12 00:59:42,093 INFO L226 Difference]: Without dead ends: 0 [2023-11-12 00:59:42,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 261 SyntacticMatches, 21 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2023-11-12 00:59:42,098 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 74 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:42,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 286 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:59:42,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-12 00:59:42,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-12 00:59:42,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 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 00:59:42,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-12 00:59:42,101 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 98 [2023-11-12 00:59:42,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:42,102 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-12 00:59:42,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 5 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (32), 5 states have call predecessors, (32), 5 states have call successors, (32) [2023-11-12 00:59:42,102 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-12 00:59:42,102 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-12 00:59:42,105 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-12 00:59:42,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927d52af-7171-41c2-b9c5-d47b12915908/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:59:42,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927d52af-7171-41c2-b9c5-d47b12915908/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-12 00:59:42,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-11-12 00:59:48,698 WARN L293 SmtUtils]: Spent 5.27s on a formula simplification. DAG size of input: 86 DAG size of output: 83 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2023-11-12 00:59:55,541 WARN L293 SmtUtils]: Spent 5.00s on a formula simplification. DAG size of input: 86 DAG size of output: 83 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)