./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label47.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_136df4c7-8596-4477-8d7b-a1873ade3810/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_136df4c7-8596-4477-8d7b-a1873ade3810/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_136df4c7-8596-4477-8d7b-a1873ade3810/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_136df4c7-8596-4477-8d7b-a1873ade3810/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label47.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_136df4c7-8596-4477-8d7b-a1873ade3810/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_136df4c7-8596-4477-8d7b-a1873ade3810/bin/utaipan-verify-t7M7D8N6sZ --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 963f44e67d66478e2f09b1d76f69d50cb14e9cad52cbcb2ea23267dbf5fe671d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:11:15,432 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:11:15,511 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_136df4c7-8596-4477-8d7b-a1873ade3810/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:11:15,515 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:11:15,515 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:11:15,552 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:11:15,557 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:11:15,557 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:11:15,559 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:11:15,564 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:11:15,564 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:11:15,565 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:11:15,565 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:11:15,567 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:11:15,567 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:11:15,568 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:11:15,568 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:11:15,569 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:11:15,569 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:11:15,570 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:11:15,570 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:11:15,571 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:11:15,572 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:11:15,572 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:11:15,573 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:11:15,573 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:11:15,574 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:11:15,574 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:11:15,575 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:11:15,575 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:11:15,577 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:11:15,577 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:11:15,577 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:11:15,577 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:11:15,578 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:11:15,578 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:11:15,578 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:11:15,579 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:11:15,579 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:11:15,579 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:11:15,579 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:11:15,580 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:11:15,580 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:11:15,580 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:11:15,581 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:11:15,581 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_136df4c7-8596-4477-8d7b-a1873ade3810/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_136df4c7-8596-4477-8d7b-a1873ade3810/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 963f44e67d66478e2f09b1d76f69d50cb14e9cad52cbcb2ea23267dbf5fe671d [2023-11-19 04:11:15,904 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:11:15,939 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:11:15,942 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:11:15,943 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:11:15,944 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:11:15,947 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_136df4c7-8596-4477-8d7b-a1873ade3810/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/eca-rers2012/Problem01_label47.c [2023-11-19 04:11:19,149 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:11:19,533 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:11:19,549 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_136df4c7-8596-4477-8d7b-a1873ade3810/sv-benchmarks/c/eca-rers2012/Problem01_label47.c [2023-11-19 04:11:19,561 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_136df4c7-8596-4477-8d7b-a1873ade3810/bin/utaipan-verify-t7M7D8N6sZ/data/a87cf94c7/cb7ca60225a84f67b25e159712f35ca7/FLAGf73cdd2f6 [2023-11-19 04:11:19,577 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_136df4c7-8596-4477-8d7b-a1873ade3810/bin/utaipan-verify-t7M7D8N6sZ/data/a87cf94c7/cb7ca60225a84f67b25e159712f35ca7 [2023-11-19 04:11:19,579 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:11:19,581 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:11:19,584 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:11:19,584 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:11:19,590 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:11:19,593 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:11:19" (1/1) ... [2023-11-19 04:11:19,594 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44230b64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:19, skipping insertion in model container [2023-11-19 04:11:19,595 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:11:19" (1/1) ... [2023-11-19 04:11:19,643 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:11:19,985 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_136df4c7-8596-4477-8d7b-a1873ade3810/sv-benchmarks/c/eca-rers2012/Problem01_label47.c[14627,14640] [2023-11-19 04:11:20,088 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:11:20,115 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:11:20,250 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_136df4c7-8596-4477-8d7b-a1873ade3810/sv-benchmarks/c/eca-rers2012/Problem01_label47.c[14627,14640] [2023-11-19 04:11:20,281 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:11:20,300 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:11:20,301 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:20 WrapperNode [2023-11-19 04:11:20,301 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:11:20,302 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:11:20,303 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:11:20,303 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:11:20,311 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:20" (1/1) ... [2023-11-19 04:11:20,342 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:20" (1/1) ... [2023-11-19 04:11:20,402 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 658 [2023-11-19 04:11:20,402 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:11:20,403 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:11:20,403 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:11:20,403 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:11:20,413 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:20" (1/1) ... [2023-11-19 04:11:20,413 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:20" (1/1) ... [2023-11-19 04:11:20,418 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:20" (1/1) ... [2023-11-19 04:11:20,418 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:20" (1/1) ... [2023-11-19 04:11:20,445 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:20" (1/1) ... [2023-11-19 04:11:20,455 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:20" (1/1) ... [2023-11-19 04:11:20,463 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:20" (1/1) ... [2023-11-19 04:11:20,468 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:20" (1/1) ... [2023-11-19 04:11:20,477 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:11:20,478 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:11:20,478 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:11:20,479 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:11:20,479 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:20" (1/1) ... [2023-11-19 04:11:20,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:11:20,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_136df4c7-8596-4477-8d7b-a1873ade3810/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:11:20,516 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_136df4c7-8596-4477-8d7b-a1873ade3810/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:11:20,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_136df4c7-8596-4477-8d7b-a1873ade3810/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:11:20,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:11:20,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:11:20,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:11:20,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:11:20,666 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:11:20,673 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:11:21,749 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:11:22,034 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:11:22,035 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 04:11:22,043 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:11:22 BoogieIcfgContainer [2023-11-19 04:11:22,043 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:11:22,047 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:11:22,047 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:11:22,051 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:11:22,051 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:11:19" (1/3) ... [2023-11-19 04:11:22,052 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13e6773f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:11:22, skipping insertion in model container [2023-11-19 04:11:22,052 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:20" (2/3) ... [2023-11-19 04:11:22,053 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13e6773f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:11:22, skipping insertion in model container [2023-11-19 04:11:22,054 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:11:22" (3/3) ... [2023-11-19 04:11:22,055 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem01_label47.c [2023-11-19 04:11:22,075 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:11:22,076 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:11:22,134 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:11:22,142 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;@fee813d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:11:22,143 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:11:22,148 INFO L276 IsEmpty]: Start isEmpty. Operand has 76 states, 74 states have (on average 1.945945945945946) internal successors, (144), 75 states have internal predecessors, (144), 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) [2023-11-19 04:11:22,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-19 04:11:22,159 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:11:22,161 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:11:22,162 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:11:22,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:11:22,168 INFO L85 PathProgramCache]: Analyzing trace with hash 378907415, now seen corresponding path program 1 times [2023-11-19 04:11:22,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:11:22,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16033077] [2023-11-19 04:11:22,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:11:22,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:11:22,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:11:22,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:11:22,842 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:11:22,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16033077] [2023-11-19 04:11:22,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16033077] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:11:22,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:11:22,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:11:22,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136819381] [2023-11-19 04:11:22,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:11:22,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:11:22,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:11:22,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:11:22,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:11:22,903 INFO L87 Difference]: Start difference. First operand has 76 states, 74 states have (on average 1.945945945945946) internal successors, (144), 75 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:11:23,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:11:23,478 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2023-11-19 04:11:23,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:11:23,481 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2023-11-19 04:11:23,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:11:23,493 INFO L225 Difference]: With dead ends: 224 [2023-11-19 04:11:23,493 INFO L226 Difference]: Without dead ends: 145 [2023-11-19 04:11:23,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:11:23,500 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 15 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 04:11:23,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 23 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 04:11:23,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-11-19 04:11:23,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2023-11-19 04:11:23,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.8402777777777777) internal successors, (265), 144 states have internal predecessors, (265), 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) [2023-11-19 04:11:23,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 265 transitions. [2023-11-19 04:11:23,552 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 265 transitions. Word has length 71 [2023-11-19 04:11:23,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:11:23,553 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 265 transitions. [2023-11-19 04:11:23,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:11:23,554 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 265 transitions. [2023-11-19 04:11:23,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-19 04:11:23,557 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:11:23,558 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:11:23,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:11:23,558 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:11:23,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:11:23,559 INFO L85 PathProgramCache]: Analyzing trace with hash -615454294, now seen corresponding path program 1 times [2023-11-19 04:11:23,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:11:23,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833131565] [2023-11-19 04:11:23,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:11:23,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:11:23,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:11:23,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:11:23,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:11:23,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833131565] [2023-11-19 04:11:23,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833131565] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:11:23,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:11:23,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:11:23,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141473500] [2023-11-19 04:11:23,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:11:23,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:11:23,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:11:23,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:11:23,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:11:23,679 INFO L87 Difference]: Start difference. First operand 145 states and 265 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:11:24,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:11:24,132 INFO L93 Difference]: Finished difference Result 431 states and 792 transitions. [2023-11-19 04:11:24,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:11:24,132 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2023-11-19 04:11:24,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:11:24,135 INFO L225 Difference]: With dead ends: 431 [2023-11-19 04:11:24,135 INFO L226 Difference]: Without dead ends: 287 [2023-11-19 04:11:24,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:11:24,138 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 82 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:11:24,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 32 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 04:11:24,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2023-11-19 04:11:24,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2023-11-19 04:11:24,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.6993006993006994) internal successors, (486), 286 states have internal predecessors, (486), 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) [2023-11-19 04:11:24,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 486 transitions. [2023-11-19 04:11:24,162 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 486 transitions. Word has length 77 [2023-11-19 04:11:24,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:11:24,163 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 486 transitions. [2023-11-19 04:11:24,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:11:24,163 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 486 transitions. [2023-11-19 04:11:24,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-11-19 04:11:24,167 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:11:24,167 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2023-11-19 04:11:24,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:11:24,168 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:11:24,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:11:24,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1583771894, now seen corresponding path program 1 times [2023-11-19 04:11:24,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:11:24,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590144725] [2023-11-19 04:11:24,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:11:24,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:11:24,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:11:24,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:11:24,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:11:24,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590144725] [2023-11-19 04:11:24,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590144725] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:11:24,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:11:24,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:11:24,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980565091] [2023-11-19 04:11:24,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:11:24,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:11:24,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:11:24,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:11:24,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:11:24,326 INFO L87 Difference]: Start difference. First operand 287 states and 486 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:11:24,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:11:24,716 INFO L93 Difference]: Finished difference Result 857 states and 1455 transitions. [2023-11-19 04:11:24,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:11:24,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2023-11-19 04:11:24,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:11:24,722 INFO L225 Difference]: With dead ends: 857 [2023-11-19 04:11:24,722 INFO L226 Difference]: Without dead ends: 571 [2023-11-19 04:11:24,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:11:24,726 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:11:24,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 144 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 04:11:24,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2023-11-19 04:11:24,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 358. [2023-11-19 04:11:24,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.6274509803921569) internal successors, (581), 357 states have internal predecessors, (581), 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) [2023-11-19 04:11:24,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 581 transitions. [2023-11-19 04:11:24,747 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 581 transitions. Word has length 78 [2023-11-19 04:11:24,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:11:24,747 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 581 transitions. [2023-11-19 04:11:24,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:11:24,748 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 581 transitions. [2023-11-19 04:11:24,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-19 04:11:24,751 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:11:24,752 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2023-11-19 04:11:24,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:11:24,752 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:11:24,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:11:24,753 INFO L85 PathProgramCache]: Analyzing trace with hash 802889221, now seen corresponding path program 1 times [2023-11-19 04:11:24,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:11:24,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370609351] [2023-11-19 04:11:24,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:11:24,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:11:24,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:11:24,949 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:11:24,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:11:24,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370609351] [2023-11-19 04:11:24,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370609351] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:11:24,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:11:24,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:11:24,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727288212] [2023-11-19 04:11:24,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:11:24,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:11:24,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:11:24,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:11:24,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:11:24,954 INFO L87 Difference]: Start difference. First operand 358 states and 581 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 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) [2023-11-19 04:11:25,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:11:25,298 INFO L93 Difference]: Finished difference Result 786 states and 1256 transitions. [2023-11-19 04:11:25,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:11:25,298 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2023-11-19 04:11:25,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:11:25,302 INFO L225 Difference]: With dead ends: 786 [2023-11-19 04:11:25,302 INFO L226 Difference]: Without dead ends: 358 [2023-11-19 04:11:25,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:11:25,316 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 77 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:11:25,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 56 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:11:25,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2023-11-19 04:11:25,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 358. [2023-11-19 04:11:25,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.350140056022409) internal successors, (482), 357 states have internal predecessors, (482), 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) [2023-11-19 04:11:25,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 482 transitions. [2023-11-19 04:11:25,333 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 482 transitions. Word has length 79 [2023-11-19 04:11:25,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:11:25,334 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 482 transitions. [2023-11-19 04:11:25,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 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) [2023-11-19 04:11:25,334 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 482 transitions. [2023-11-19 04:11:25,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-19 04:11:25,344 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:11:25,345 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2023-11-19 04:11:25,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 04:11:25,345 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:11:25,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:11:25,347 INFO L85 PathProgramCache]: Analyzing trace with hash 713022525, now seen corresponding path program 1 times [2023-11-19 04:11:25,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:11:25,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045803872] [2023-11-19 04:11:25,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:11:25,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:11:25,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:11:25,564 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 04:11:25,565 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:11:25,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045803872] [2023-11-19 04:11:25,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045803872] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:11:25,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:11:25,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:11:25,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55174682] [2023-11-19 04:11:25,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:11:25,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:11:25,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:11:25,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:11:25,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:11:25,567 INFO L87 Difference]: Start difference. First operand 358 states and 482 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:11:25,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:11:25,842 INFO L93 Difference]: Finished difference Result 999 states and 1349 transitions. [2023-11-19 04:11:25,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:11:25,843 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2023-11-19 04:11:25,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:11:25,847 INFO L225 Difference]: With dead ends: 999 [2023-11-19 04:11:25,847 INFO L226 Difference]: Without dead ends: 642 [2023-11-19 04:11:25,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:11:25,849 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 69 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:11:25,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 40 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:11:25,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2023-11-19 04:11:25,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 571. [2023-11-19 04:11:25,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 1.2771929824561403) internal successors, (728), 570 states have internal predecessors, (728), 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) [2023-11-19 04:11:25,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 728 transitions. [2023-11-19 04:11:25,866 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 728 transitions. Word has length 83 [2023-11-19 04:11:25,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:11:25,866 INFO L495 AbstractCegarLoop]: Abstraction has 571 states and 728 transitions. [2023-11-19 04:11:25,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:11:25,866 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 728 transitions. [2023-11-19 04:11:25,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-19 04:11:25,868 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:11:25,868 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2023-11-19 04:11:25,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 04:11:25,869 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:11:25,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:11:25,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1234133893, now seen corresponding path program 1 times [2023-11-19 04:11:25,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:11:25,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410965977] [2023-11-19 04:11:25,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:11:25,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:11:25,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:11:25,983 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 04:11:25,983 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:11:25,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410965977] [2023-11-19 04:11:25,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410965977] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:11:25,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:11:25,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:11:25,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210806068] [2023-11-19 04:11:25,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:11:25,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:11:25,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:11:25,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:11:25,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:11:25,985 INFO L87 Difference]: Start difference. First operand 571 states and 728 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:11:26,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:11:26,329 INFO L93 Difference]: Finished difference Result 1425 states and 1821 transitions. [2023-11-19 04:11:26,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:11:26,330 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2023-11-19 04:11:26,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:11:26,344 INFO L225 Difference]: With dead ends: 1425 [2023-11-19 04:11:26,344 INFO L226 Difference]: Without dead ends: 855 [2023-11-19 04:11:26,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:11:26,347 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 74 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:11:26,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 8 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:11:26,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2023-11-19 04:11:26,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 713. [2023-11-19 04:11:26,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 1.2893258426966292) internal successors, (918), 712 states have internal predecessors, (918), 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) [2023-11-19 04:11:26,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 918 transitions. [2023-11-19 04:11:26,373 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 918 transitions. Word has length 92 [2023-11-19 04:11:26,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:11:26,373 INFO L495 AbstractCegarLoop]: Abstraction has 713 states and 918 transitions. [2023-11-19 04:11:26,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:11:26,374 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 918 transitions. [2023-11-19 04:11:26,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-19 04:11:26,376 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:11:26,376 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:11:26,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 04:11:26,377 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:11:26,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:11:26,377 INFO L85 PathProgramCache]: Analyzing trace with hash 692539411, now seen corresponding path program 1 times [2023-11-19 04:11:26,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:11:26,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186220903] [2023-11-19 04:11:26,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:11:26,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:11:26,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:11:26,566 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:11:26,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:11:26,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186220903] [2023-11-19 04:11:26,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186220903] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:11:26,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:11:26,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:11:26,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673029580] [2023-11-19 04:11:26,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:11:26,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:11:26,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:11:26,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:11:26,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:11:26,572 INFO L87 Difference]: Start difference. First operand 713 states and 918 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 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) [2023-11-19 04:11:26,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:11:26,872 INFO L93 Difference]: Finished difference Result 1567 states and 2007 transitions. [2023-11-19 04:11:26,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:11:26,873 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2023-11-19 04:11:26,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:11:26,878 INFO L225 Difference]: With dead ends: 1567 [2023-11-19 04:11:26,879 INFO L226 Difference]: Without dead ends: 855 [2023-11-19 04:11:26,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:11:26,881 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 45 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:11:26,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 51 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:11:26,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2023-11-19 04:11:26,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 855. [2023-11-19 04:11:26,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 854 states have (on average 1.259953161592506) internal successors, (1076), 854 states have internal predecessors, (1076), 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) [2023-11-19 04:11:26,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1076 transitions. [2023-11-19 04:11:26,910 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1076 transitions. Word has length 100 [2023-11-19 04:11:26,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:11:26,910 INFO L495 AbstractCegarLoop]: Abstraction has 855 states and 1076 transitions. [2023-11-19 04:11:26,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 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) [2023-11-19 04:11:26,911 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1076 transitions. [2023-11-19 04:11:26,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-19 04:11:26,947 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:11:26,947 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:11:26,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 04:11:26,948 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:11:26,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:11:26,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1427757861, now seen corresponding path program 1 times [2023-11-19 04:11:26,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:11:26,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140379181] [2023-11-19 04:11:26,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:11:26,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:11:26,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:11:27,199 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:11:27,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:11:27,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140379181] [2023-11-19 04:11:27,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140379181] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:11:27,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:11:27,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:11:27,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921178975] [2023-11-19 04:11:27,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:11:27,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:11:27,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:11:27,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:11:27,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:11:27,202 INFO L87 Difference]: Start difference. First operand 855 states and 1076 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:11:27,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:11:27,701 INFO L93 Difference]: Finished difference Result 1851 states and 2333 transitions. [2023-11-19 04:11:27,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:11:27,702 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2023-11-19 04:11:27,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:11:27,708 INFO L225 Difference]: With dead ends: 1851 [2023-11-19 04:11:27,708 INFO L226 Difference]: Without dead ends: 997 [2023-11-19 04:11:27,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:11:27,710 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 117 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 04:11:27,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 52 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 04:11:27,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2023-11-19 04:11:27,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 926. [2023-11-19 04:11:27,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 1.2443243243243243) internal successors, (1151), 925 states have internal predecessors, (1151), 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) [2023-11-19 04:11:27,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1151 transitions. [2023-11-19 04:11:27,741 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1151 transitions. Word has length 104 [2023-11-19 04:11:27,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:11:27,742 INFO L495 AbstractCegarLoop]: Abstraction has 926 states and 1151 transitions. [2023-11-19 04:11:27,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:11:27,742 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1151 transitions. [2023-11-19 04:11:27,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-19 04:11:27,745 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:11:27,745 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:11:27,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 04:11:27,746 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:11:27,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:11:27,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1726355692, now seen corresponding path program 1 times [2023-11-19 04:11:27,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:11:27,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266995466] [2023-11-19 04:11:27,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:11:27,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:11:27,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:11:28,012 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 04:11:28,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:11:28,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266995466] [2023-11-19 04:11:28,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266995466] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:11:28,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:11:28,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:11:28,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756697074] [2023-11-19 04:11:28,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:11:28,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:11:28,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:11:28,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:11:28,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:11:28,015 INFO L87 Difference]: Start difference. First operand 926 states and 1151 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 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) [2023-11-19 04:11:28,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:11:28,468 INFO L93 Difference]: Finished difference Result 2064 states and 2547 transitions. [2023-11-19 04:11:28,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:11:28,469 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2023-11-19 04:11:28,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:11:28,475 INFO L225 Difference]: With dead ends: 2064 [2023-11-19 04:11:28,476 INFO L226 Difference]: Without dead ends: 1068 [2023-11-19 04:11:28,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:11:28,482 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 162 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:11:28,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 28 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 04:11:28,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2023-11-19 04:11:28,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 926. [2023-11-19 04:11:28,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 1.1643243243243244) internal successors, (1077), 925 states have internal predecessors, (1077), 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) [2023-11-19 04:11:28,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1077 transitions. [2023-11-19 04:11:28,516 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1077 transitions. Word has length 129 [2023-11-19 04:11:28,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:11:28,517 INFO L495 AbstractCegarLoop]: Abstraction has 926 states and 1077 transitions. [2023-11-19 04:11:28,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 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) [2023-11-19 04:11:28,517 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1077 transitions. [2023-11-19 04:11:28,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-11-19 04:11:28,520 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:11:28,520 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1] [2023-11-19 04:11:28,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 04:11:28,520 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:11:28,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:11:28,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1435599864, now seen corresponding path program 1 times [2023-11-19 04:11:28,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:11:28,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581987558] [2023-11-19 04:11:28,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:11:28,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:11:28,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:11:28,727 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:11:28,727 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:11:28,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581987558] [2023-11-19 04:11:28,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581987558] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:11:28,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:11:28,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:11:28,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760633678] [2023-11-19 04:11:28,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:11:28,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:11:28,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:11:28,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:11:28,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:11:28,730 INFO L87 Difference]: Start difference. First operand 926 states and 1077 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 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) [2023-11-19 04:11:29,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:11:29,053 INFO L93 Difference]: Finished difference Result 1922 states and 2243 transitions. [2023-11-19 04:11:29,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:11:29,054 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2023-11-19 04:11:29,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:11:29,063 INFO L225 Difference]: With dead ends: 1922 [2023-11-19 04:11:29,063 INFO L226 Difference]: Without dead ends: 997 [2023-11-19 04:11:29,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:11:29,067 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:11:29,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 96 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:11:29,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2023-11-19 04:11:29,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 997. [2023-11-19 04:11:29,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 996 states have (on average 1.1365461847389557) internal successors, (1132), 996 states have internal predecessors, (1132), 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) [2023-11-19 04:11:29,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1132 transitions. [2023-11-19 04:11:29,101 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1132 transitions. Word has length 130 [2023-11-19 04:11:29,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:11:29,102 INFO L495 AbstractCegarLoop]: Abstraction has 997 states and 1132 transitions. [2023-11-19 04:11:29,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 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) [2023-11-19 04:11:29,102 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1132 transitions. [2023-11-19 04:11:29,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-11-19 04:11:29,104 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:11:29,105 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:11:29,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 04:11:29,105 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:11:29,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:11:29,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1798879017, now seen corresponding path program 1 times [2023-11-19 04:11:29,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:11:29,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126954113] [2023-11-19 04:11:29,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:11:29,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:11:29,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:11:29,249 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-19 04:11:29,249 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:11:29,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126954113] [2023-11-19 04:11:29,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126954113] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:11:29,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:11:29,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:11:29,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933762008] [2023-11-19 04:11:29,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:11:29,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:11:29,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:11:29,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:11:29,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:11:29,252 INFO L87 Difference]: Start difference. First operand 997 states and 1132 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:11:29,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:11:29,530 INFO L93 Difference]: Finished difference Result 1993 states and 2263 transitions. [2023-11-19 04:11:29,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:11:29,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2023-11-19 04:11:29,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:11:29,535 INFO L225 Difference]: With dead ends: 1993 [2023-11-19 04:11:29,535 INFO L226 Difference]: Without dead ends: 642 [2023-11-19 04:11:29,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:11:29,538 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 12 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:11:29,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 100 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:11:29,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2023-11-19 04:11:29,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 642. [2023-11-19 04:11:29,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 1.0811232449297972) internal successors, (693), 641 states have internal predecessors, (693), 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) [2023-11-19 04:11:29,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 693 transitions. [2023-11-19 04:11:29,558 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 693 transitions. Word has length 143 [2023-11-19 04:11:29,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:11:29,558 INFO L495 AbstractCegarLoop]: Abstraction has 642 states and 693 transitions. [2023-11-19 04:11:29,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:11:29,558 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 693 transitions. [2023-11-19 04:11:29,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2023-11-19 04:11:29,561 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:11:29,561 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:11:29,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 04:11:29,562 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:11:29,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:11:29,562 INFO L85 PathProgramCache]: Analyzing trace with hash -573121035, now seen corresponding path program 1 times [2023-11-19 04:11:29,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:11:29,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882463275] [2023-11-19 04:11:29,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:11:29,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:11:29,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:11:29,816 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-11-19 04:11:29,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:11:29,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882463275] [2023-11-19 04:11:29,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882463275] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:11:29,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:11:29,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:11:29,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021429212] [2023-11-19 04:11:29,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:11:29,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:11:29,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:11:29,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:11:29,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:11:29,819 INFO L87 Difference]: Start difference. First operand 642 states and 693 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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) [2023-11-19 04:11:30,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:11:30,053 INFO L93 Difference]: Finished difference Result 1496 states and 1602 transitions. [2023-11-19 04:11:30,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:11:30,054 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 194 [2023-11-19 04:11:30,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:11:30,058 INFO L225 Difference]: With dead ends: 1496 [2023-11-19 04:11:30,058 INFO L226 Difference]: Without dead ends: 642 [2023-11-19 04:11:30,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:11:30,060 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 9 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:11:30,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 85 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:11:30,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2023-11-19 04:11:30,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 642. [2023-11-19 04:11:30,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 1.0655226209048363) internal successors, (683), 641 states have internal predecessors, (683), 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) [2023-11-19 04:11:30,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 683 transitions. [2023-11-19 04:11:30,081 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 683 transitions. Word has length 194 [2023-11-19 04:11:30,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:11:30,081 INFO L495 AbstractCegarLoop]: Abstraction has 642 states and 683 transitions. [2023-11-19 04:11:30,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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) [2023-11-19 04:11:30,082 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 683 transitions. [2023-11-19 04:11:30,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2023-11-19 04:11:30,086 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:11:30,086 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:11:30,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 04:11:30,086 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:11:30,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:11:30,087 INFO L85 PathProgramCache]: Analyzing trace with hash -357705682, now seen corresponding path program 1 times [2023-11-19 04:11:30,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:11:30,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054267049] [2023-11-19 04:11:30,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:11:30,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:11:30,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:11:30,795 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 246 proven. 84 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-19 04:11:30,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:11:30,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054267049] [2023-11-19 04:11:30,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054267049] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:11:30,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18939266] [2023-11-19 04:11:30,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:11:30,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:11:30,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_136df4c7-8596-4477-8d7b-a1873ade3810/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:11:30,801 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_136df4c7-8596-4477-8d7b-a1873ade3810/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:11:30,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_136df4c7-8596-4477-8d7b-a1873ade3810/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:11:31,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:11:31,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-19 04:11:31,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:11:31,750 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 216 proven. 48 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2023-11-19 04:11:31,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:11:32,348 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 216 proven. 48 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2023-11-19 04:11:32,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18939266] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:11:32,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1329114750] [2023-11-19 04:11:32,385 INFO L159 IcfgInterpreter]: Started Sifa with 73 locations of interest [2023-11-19 04:11:32,385 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:11:32,390 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:11:32,396 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:11:32,397 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs