./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label52.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2ec841-63c1-4697-b626-ead53b0aba87/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2ec841-63c1-4697-b626-ead53b0aba87/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2ec841-63c1-4697-b626-ead53b0aba87/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2ec841-63c1-4697-b626-ead53b0aba87/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label52.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2ec841-63c1-4697-b626-ead53b0aba87/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2ec841-63c1-4697-b626-ead53b0aba87/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dadc4a7f56d2eeb12d7009442a875d9c494d437949017438f5005c98bfcd0bea --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:11:02,859 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:11:02,968 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2ec841-63c1-4697-b626-ead53b0aba87/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:11:02,980 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:11:02,981 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:11:03,026 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:11:03,028 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:11:03,028 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:11:03,029 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:11:03,034 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:11:03,035 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:11:03,035 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:11:03,035 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:11:03,037 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:11:03,038 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:11:03,038 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:11:03,038 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:11:03,039 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:11:03,039 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:11:03,039 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:11:03,040 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:11:03,040 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:11:03,042 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:11:03,042 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:11:03,043 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:11:03,043 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:11:03,043 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:11:03,044 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:11:03,044 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:11:03,045 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:11:03,046 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:11:03,046 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:11:03,046 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:11:03,047 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:11:03,047 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:11:03,047 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:11:03,048 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:11:03,048 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:11:03,048 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:11:03,048 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:11:03,049 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:11:03,049 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:11:03,049 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:11:03,050 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:11:03,050 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:11:03,050 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_2e2ec841-63c1-4697-b626-ead53b0aba87/bin/utaipan-verify-NcY6lQBIFX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2ec841-63c1-4697-b626-ead53b0aba87/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dadc4a7f56d2eeb12d7009442a875d9c494d437949017438f5005c98bfcd0bea [2023-11-12 00:11:03,303 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:11:03,344 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:11:03,347 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:11:03,348 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:11:03,349 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:11:03,351 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2ec841-63c1-4697-b626-ead53b0aba87/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/eca-rers2012/Problem03_label52.c [2023-11-12 00:11:06,568 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:11:06,950 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:11:06,951 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2ec841-63c1-4697-b626-ead53b0aba87/sv-benchmarks/c/eca-rers2012/Problem03_label52.c [2023-11-12 00:11:06,975 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2ec841-63c1-4697-b626-ead53b0aba87/bin/utaipan-verify-NcY6lQBIFX/data/0ba5e8fa4/d783ae19c8d5487c8d20fa8e8b767e06/FLAGaea869c29 [2023-11-12 00:11:06,995 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2ec841-63c1-4697-b626-ead53b0aba87/bin/utaipan-verify-NcY6lQBIFX/data/0ba5e8fa4/d783ae19c8d5487c8d20fa8e8b767e06 [2023-11-12 00:11:07,001 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:11:07,005 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:11:07,008 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:11:07,009 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:11:07,014 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:11:07,015 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:11:06" (1/1) ... [2023-11-12 00:11:07,016 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13408696 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:11:07, skipping insertion in model container [2023-11-12 00:11:07,016 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:11:06" (1/1) ... [2023-11-12 00:11:07,107 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:11:07,915 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_2e2ec841-63c1-4697-b626-ead53b0aba87/sv-benchmarks/c/eca-rers2012/Problem03_label52.c[53923,53936] [2023-11-12 00:11:07,967 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:11:07,983 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:11:08,236 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_2e2ec841-63c1-4697-b626-ead53b0aba87/sv-benchmarks/c/eca-rers2012/Problem03_label52.c[53923,53936] [2023-11-12 00:11:08,255 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:11:08,279 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:11:08,280 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:11:08 WrapperNode [2023-11-12 00:11:08,280 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:11:08,281 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:11:08,281 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:11:08,281 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:11:08,289 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:11:08" (1/1) ... [2023-11-12 00:11:08,342 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:11:08" (1/1) ... [2023-11-12 00:11:08,450 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1772 [2023-11-12 00:11:08,450 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:11:08,451 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:11:08,451 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:11:08,451 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:11:08,463 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:11:08" (1/1) ... [2023-11-12 00:11:08,463 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:11:08" (1/1) ... [2023-11-12 00:11:08,474 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:11:08" (1/1) ... [2023-11-12 00:11:08,474 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:11:08" (1/1) ... [2023-11-12 00:11:08,584 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:11:08" (1/1) ... [2023-11-12 00:11:08,607 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:11:08" (1/1) ... [2023-11-12 00:11:08,628 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:11:08" (1/1) ... [2023-11-12 00:11:08,638 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:11:08" (1/1) ... [2023-11-12 00:11:08,652 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:11:08,654 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:11:08,654 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:11:08,654 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:11:08,655 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:11:08" (1/1) ... [2023-11-12 00:11:08,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:11:08,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2ec841-63c1-4697-b626-ead53b0aba87/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:11:08,690 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2ec841-63c1-4697-b626-ead53b0aba87/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:11:08,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2ec841-63c1-4697-b626-ead53b0aba87/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:11:08,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:11:08,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:11:08,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:11:08,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:11:08,853 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:11:08,855 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:11:10,881 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:11:11,334 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:11:11,334 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 00:11:11,337 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:11:11 BoogieIcfgContainer [2023-11-12 00:11:11,338 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:11:11,340 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:11:11,341 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:11:11,344 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:11:11,344 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:11:06" (1/3) ... [2023-11-12 00:11:11,345 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@694a3dda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:11:11, skipping insertion in model container [2023-11-12 00:11:11,345 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:11:08" (2/3) ... [2023-11-12 00:11:11,346 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@694a3dda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:11:11, skipping insertion in model container [2023-11-12 00:11:11,346 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:11:11" (3/3) ... [2023-11-12 00:11:11,347 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label52.c [2023-11-12 00:11:11,368 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:11:11,368 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:11:11,428 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:11:11,437 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;@55b405da, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:11:11,438 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:11:11,445 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:11:11,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-11-12 00:11:11,463 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:11:11,464 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:11:11,464 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:11:11,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:11:11,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1724868872, now seen corresponding path program 1 times [2023-11-12 00:11:11,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:11:11,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620330568] [2023-11-12 00:11:11,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:11,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:11:11,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:12,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:11:12,818 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:11:12,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620330568] [2023-11-12 00:11:12,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620330568] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:11:12,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:11:12,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:11:12,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439241421] [2023-11-12 00:11:12,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:11:12,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:11:12,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:11:12,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:11:12,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:11:12,885 INFO L87 Difference]: Start difference. First operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 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 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:11:13,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:11:13,977 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2023-11-12 00:11:13,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:11:13,980 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 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 [2023-11-12 00:11:13,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:11:14,003 INFO L225 Difference]: With dead ends: 440 [2023-11-12 00:11:14,004 INFO L226 Difference]: Without dead ends: 289 [2023-11-12 00:11:14,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:11:14,014 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 28 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:11:14,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 35 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 00:11:14,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2023-11-12 00:11:14,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2023-11-12 00:11:14,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.8680555555555556) internal successors, (538), 288 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:11:14,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 538 transitions. [2023-11-12 00:11:14,102 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 538 transitions. Word has length 143 [2023-11-12 00:11:14,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:11:14,106 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 538 transitions. [2023-11-12 00:11:14,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:11:14,106 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 538 transitions. [2023-11-12 00:11:14,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-11-12 00:11:14,119 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:11:14,119 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:11:14,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:11:14,120 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:11:14,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:11:14,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1932977710, now seen corresponding path program 1 times [2023-11-12 00:11:14,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:11:14,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493446569] [2023-11-12 00:11:14,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:14,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:11:14,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:14,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:11:14,537 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:11:14,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493446569] [2023-11-12 00:11:14,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493446569] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:11:14,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:11:14,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:11:14,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851361445] [2023-11-12 00:11:14,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:11:14,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:11:14,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:11:14,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:11:14,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:11:14,541 INFO L87 Difference]: Start difference. First operand 289 states and 538 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:11:15,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:11:15,419 INFO L93 Difference]: Finished difference Result 865 states and 1612 transitions. [2023-11-12 00:11:15,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:11:15,421 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 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 147 [2023-11-12 00:11:15,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:11:15,425 INFO L225 Difference]: With dead ends: 865 [2023-11-12 00:11:15,425 INFO L226 Difference]: Without dead ends: 577 [2023-11-12 00:11:15,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:11:15,429 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 187 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 00:11:15,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 41 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 00:11:15,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2023-11-12 00:11:15,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 575. [2023-11-12 00:11:15,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.8344947735191637) internal successors, (1053), 574 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:11:15,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1053 transitions. [2023-11-12 00:11:15,461 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1053 transitions. Word has length 147 [2023-11-12 00:11:15,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:11:15,461 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 1053 transitions. [2023-11-12 00:11:15,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:11:15,462 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1053 transitions. [2023-11-12 00:11:15,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-11-12 00:11:15,465 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:11:15,465 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:11:15,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:11:15,466 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:11:15,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:11:15,466 INFO L85 PathProgramCache]: Analyzing trace with hash -688090158, now seen corresponding path program 1 times [2023-11-12 00:11:15,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:11:15,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145668333] [2023-11-12 00:11:15,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:15,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:11:15,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:15,846 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:11:15,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:11:15,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145668333] [2023-11-12 00:11:15,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145668333] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:11:15,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:11:15,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:11:15,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617078341] [2023-11-12 00:11:15,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:11:15,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:11:15,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:11:15,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:11:15,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:11:15,851 INFO L87 Difference]: Start difference. First operand 575 states and 1053 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:11:16,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:11:16,826 INFO L93 Difference]: Finished difference Result 1721 states and 3156 transitions. [2023-11-12 00:11:16,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:11:16,827 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 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 153 [2023-11-12 00:11:16,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:11:16,841 INFO L225 Difference]: With dead ends: 1721 [2023-11-12 00:11:16,842 INFO L226 Difference]: Without dead ends: 1147 [2023-11-12 00:11:16,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:11:16,849 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 155 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 00:11:16,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 41 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 00:11:16,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2023-11-12 00:11:16,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1147. [2023-11-12 00:11:16,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.7172774869109948) internal successors, (1968), 1146 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:11:16,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1968 transitions. [2023-11-12 00:11:16,909 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1968 transitions. Word has length 153 [2023-11-12 00:11:16,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:11:16,909 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 1968 transitions. [2023-11-12 00:11:16,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:11:16,910 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1968 transitions. [2023-11-12 00:11:16,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-11-12 00:11:16,915 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:11:16,916 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:11:16,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:11:16,916 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:11:16,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:11:16,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1995290513, now seen corresponding path program 1 times [2023-11-12 00:11:16,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:11:16,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817166271] [2023-11-12 00:11:16,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:16,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:11:17,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:17,160 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:11:17,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:11:17,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817166271] [2023-11-12 00:11:17,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817166271] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:11:17,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:11:17,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:11:17,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965161253] [2023-11-12 00:11:17,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:11:17,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:11:17,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:11:17,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:11:17,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:11:17,163 INFO L87 Difference]: Start difference. First operand 1147 states and 1968 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:11:18,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:11:18,091 INFO L93 Difference]: Finished difference Result 3437 states and 5901 transitions. [2023-11-12 00:11:18,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:11:18,092 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 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 154 [2023-11-12 00:11:18,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:11:18,110 INFO L225 Difference]: With dead ends: 3437 [2023-11-12 00:11:18,110 INFO L226 Difference]: Without dead ends: 2291 [2023-11-12 00:11:18,112 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 [2023-11-12 00:11:18,121 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 171 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 00:11:18,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 77 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 00:11:18,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2023-11-12 00:11:18,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2291. [2023-11-12 00:11:18,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 1.6174672489082969) internal successors, (3704), 2290 states have internal predecessors, (3704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:11:18,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 3704 transitions. [2023-11-12 00:11:18,258 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 3704 transitions. Word has length 154 [2023-11-12 00:11:18,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:11:18,258 INFO L495 AbstractCegarLoop]: Abstraction has 2291 states and 3704 transitions. [2023-11-12 00:11:18,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:11:18,259 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 3704 transitions. [2023-11-12 00:11:18,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-11-12 00:11:18,267 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:11:18,267 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:11:18,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:11:18,268 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:11:18,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:11:18,269 INFO L85 PathProgramCache]: Analyzing trace with hash -341458360, now seen corresponding path program 1 times [2023-11-12 00:11:18,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:11:18,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318101593] [2023-11-12 00:11:18,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:18,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:11:18,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:18,604 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:11:18,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:11:18,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318101593] [2023-11-12 00:11:18,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318101593] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:11:18,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:11:18,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:11:18,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290949049] [2023-11-12 00:11:18,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:11:18,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:11:18,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:11:18,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:11:18,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:11:18,610 INFO L87 Difference]: Start difference. First operand 2291 states and 3704 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:11:19,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:11:19,592 INFO L93 Difference]: Finished difference Result 6869 states and 11109 transitions. [2023-11-12 00:11:19,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:11:19,593 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 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 157 [2023-11-12 00:11:19,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:11:19,620 INFO L225 Difference]: With dead ends: 6869 [2023-11-12 00:11:19,620 INFO L226 Difference]: Without dead ends: 4579 [2023-11-12 00:11:19,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:11:19,625 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 155 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 00:11:19,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 62 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 00:11:19,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4579 states. [2023-11-12 00:11:19,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4579 to 4579. [2023-11-12 00:11:19,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4579 states, 4578 states have (on average 1.5220620358235037) internal successors, (6968), 4578 states have internal predecessors, (6968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:11:19,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4579 states to 4579 states and 6968 transitions. [2023-11-12 00:11:19,791 INFO L78 Accepts]: Start accepts. Automaton has 4579 states and 6968 transitions. Word has length 157 [2023-11-12 00:11:19,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:11:19,792 INFO L495 AbstractCegarLoop]: Abstraction has 4579 states and 6968 transitions. [2023-11-12 00:11:19,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:11:19,792 INFO L276 IsEmpty]: Start isEmpty. Operand 4579 states and 6968 transitions. [2023-11-12 00:11:19,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-11-12 00:11:19,802 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:11:19,802 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:11:19,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 00:11:19,802 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:11:19,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:11:19,803 INFO L85 PathProgramCache]: Analyzing trace with hash 206147760, now seen corresponding path program 1 times [2023-11-12 00:11:19,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:11:19,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040232168] [2023-11-12 00:11:19,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:19,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:11:19,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:20,076 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 00:11:20,077 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:11:20,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040232168] [2023-11-12 00:11:20,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040232168] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:11:20,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:11:20,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:11:20,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062634563] [2023-11-12 00:11:20,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:11:20,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:11:20,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:11:20,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:11:20,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:11:20,080 INFO L87 Difference]: Start difference. First operand 4579 states and 6968 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:11:21,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:11:21,141 INFO L93 Difference]: Finished difference Result 13304 states and 20240 transitions. [2023-11-12 00:11:21,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:11:21,142 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 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 162 [2023-11-12 00:11:21,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:11:21,195 INFO L225 Difference]: With dead ends: 13304 [2023-11-12 00:11:21,195 INFO L226 Difference]: Without dead ends: 8726 [2023-11-12 00:11:21,201 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 [2023-11-12 00:11:21,203 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 152 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 00:11:21,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 259 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 00:11:21,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8726 states. [2023-11-12 00:11:21,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8726 to 8726. [2023-11-12 00:11:21,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8726 states, 8725 states have (on average 1.3147277936962751) internal successors, (11471), 8725 states have internal predecessors, (11471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:11:21,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8726 states to 8726 states and 11471 transitions. [2023-11-12 00:11:21,461 INFO L78 Accepts]: Start accepts. Automaton has 8726 states and 11471 transitions. Word has length 162 [2023-11-12 00:11:21,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:11:21,464 INFO L495 AbstractCegarLoop]: Abstraction has 8726 states and 11471 transitions. [2023-11-12 00:11:21,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:11:21,464 INFO L276 IsEmpty]: Start isEmpty. Operand 8726 states and 11471 transitions. [2023-11-12 00:11:21,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-11-12 00:11:21,485 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:11:21,485 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:11:21,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 00:11:21,486 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:11:21,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:11:21,487 INFO L85 PathProgramCache]: Analyzing trace with hash 181279743, now seen corresponding path program 1 times [2023-11-12 00:11:21,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:11:21,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338750219] [2023-11-12 00:11:21,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:21,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:11:21,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:22,068 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 61 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-12 00:11:22,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:11:22,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338750219] [2023-11-12 00:11:22,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338750219] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:11:22,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259149006] [2023-11-12 00:11:22,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:22,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:11:22,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2ec841-63c1-4697-b626-ead53b0aba87/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:11:22,076 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2ec841-63c1-4697-b626-ead53b0aba87/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:11:22,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2ec841-63c1-4697-b626-ead53b0aba87/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:11:22,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:22,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:11:22,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:11:22,449 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-12 00:11:22,451 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:11:22,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259149006] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:11:22,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:11:22,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-11-12 00:11:22,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658020200] [2023-11-12 00:11:22,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:11:22,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:11:22,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:11:22,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:11:22,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:11:22,454 INFO L87 Difference]: Start difference. First operand 8726 states and 11471 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:11:23,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:11:23,070 INFO L93 Difference]: Finished difference Result 17165 states and 22557 transitions. [2023-11-12 00:11:23,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:11:23,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 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 199 [2023-11-12 00:11:23,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:11:23,135 INFO L225 Difference]: With dead ends: 17165 [2023-11-12 00:11:23,135 INFO L226 Difference]: Without dead ends: 8726 [2023-11-12 00:11:23,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:11:23,147 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 227 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:11:23,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 4 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:11:23,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8726 states. [2023-11-12 00:11:23,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8726 to 8726. [2023-11-12 00:11:23,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8726 states, 8725 states have (on average 1.2979942693409743) internal successors, (11325), 8725 states have internal predecessors, (11325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:11:23,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8726 states to 8726 states and 11325 transitions. [2023-11-12 00:11:23,420 INFO L78 Accepts]: Start accepts. Automaton has 8726 states and 11325 transitions. Word has length 199 [2023-11-12 00:11:23,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:11:23,421 INFO L495 AbstractCegarLoop]: Abstraction has 8726 states and 11325 transitions. [2023-11-12 00:11:23,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:11:23,422 INFO L276 IsEmpty]: Start isEmpty. Operand 8726 states and 11325 transitions. [2023-11-12 00:11:23,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2023-11-12 00:11:23,444 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:11:23,445 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:11:23,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2ec841-63c1-4697-b626-ead53b0aba87/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:11:23,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2ec841-63c1-4697-b626-ead53b0aba87/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:11:23,653 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:11:23,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:11:23,654 INFO L85 PathProgramCache]: Analyzing trace with hash -403447463, now seen corresponding path program 1 times [2023-11-12 00:11:23,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:11:23,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251758802] [2023-11-12 00:11:23,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:23,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:11:23,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:24,419 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 72 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-12 00:11:24,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:11:24,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251758802] [2023-11-12 00:11:24,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251758802] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:11:24,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839067791] [2023-11-12 00:11:24,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:24,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:11:24,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2ec841-63c1-4697-b626-ead53b0aba87/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:11:24,422 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2ec841-63c1-4697-b626-ead53b0aba87/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:11:24,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2ec841-63c1-4697-b626-ead53b0aba87/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:11:24,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:24,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:11:24,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:11:24,707 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 00:11:24,707 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:11:24,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839067791] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:11:24,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:11:24,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-12 00:11:24,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902480480] [2023-11-12 00:11:24,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:11:24,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:11:24,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:11:24,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:11:24,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:11:24,711 INFO L87 Difference]: Start difference. First operand 8726 states and 11325 transitions. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:11:25,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:11:25,741 INFO L93 Difference]: Finished difference Result 20740 states and 27644 transitions. [2023-11-12 00:11:25,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:11:25,742 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 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 210 [2023-11-12 00:11:25,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:11:25,766 INFO L225 Difference]: With dead ends: 20740 [2023-11-12 00:11:25,766 INFO L226 Difference]: Without dead ends: 12015 [2023-11-12 00:11:25,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:11:25,779 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 137 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 00:11:25,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 85 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 00:11:25,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12015 states. [2023-11-12 00:11:26,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12015 to 12015. [2023-11-12 00:11:26,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12015 states, 12014 states have (on average 1.2553687364741135) internal successors, (15082), 12014 states have internal predecessors, (15082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:11:26,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12015 states to 12015 states and 15082 transitions. [2023-11-12 00:11:26,149 INFO L78 Accepts]: Start accepts. Automaton has 12015 states and 15082 transitions. Word has length 210 [2023-11-12 00:11:26,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:11:26,150 INFO L495 AbstractCegarLoop]: Abstraction has 12015 states and 15082 transitions. [2023-11-12 00:11:26,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:11:26,152 INFO L276 IsEmpty]: Start isEmpty. Operand 12015 states and 15082 transitions. [2023-11-12 00:11:26,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2023-11-12 00:11:26,175 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:11:26,175 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:11:26,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2ec841-63c1-4697-b626-ead53b0aba87/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:11:26,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2ec841-63c1-4697-b626-ead53b0aba87/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:11:26,382 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:11:26,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:11:26,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1791325636, now seen corresponding path program 1 times [2023-11-12 00:11:26,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:11:26,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577960007] [2023-11-12 00:11:26,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:26,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:11:26,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:27,219 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:11:27,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:11:27,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577960007] [2023-11-12 00:11:27,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577960007] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:11:27,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:11:27,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:11:27,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462906978] [2023-11-12 00:11:27,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:11:27,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:11:27,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:11:27,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:11:27,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:11:27,222 INFO L87 Difference]: Start difference. First operand 12015 states and 15082 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:11:28,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:11:28,007 INFO L93 Difference]: Finished difference Result 24172 states and 30338 transitions. [2023-11-12 00:11:28,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:11:28,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 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 217 [2023-11-12 00:11:28,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:11:28,034 INFO L225 Difference]: With dead ends: 24172 [2023-11-12 00:11:28,034 INFO L226 Difference]: Without dead ends: 12444 [2023-11-12 00:11:28,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:11:28,052 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 72 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 00:11:28,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 100 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 00:11:28,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12444 states. [2023-11-12 00:11:28,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12444 to 12444. [2023-11-12 00:11:28,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12444 states, 12443 states have (on average 1.251868520453267) internal successors, (15577), 12443 states have internal predecessors, (15577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:11:28,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12444 states to 12444 states and 15577 transitions. [2023-11-12 00:11:28,471 INFO L78 Accepts]: Start accepts. Automaton has 12444 states and 15577 transitions. Word has length 217 [2023-11-12 00:11:28,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:11:28,472 INFO L495 AbstractCegarLoop]: Abstraction has 12444 states and 15577 transitions. [2023-11-12 00:11:28,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:11:28,472 INFO L276 IsEmpty]: Start isEmpty. Operand 12444 states and 15577 transitions. [2023-11-12 00:11:28,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2023-11-12 00:11:28,497 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:11:28,498 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:11:28,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 00:11:28,499 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:11:28,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:11:28,499 INFO L85 PathProgramCache]: Analyzing trace with hash -740929227, now seen corresponding path program 1 times [2023-11-12 00:11:28,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:11:28,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749231657] [2023-11-12 00:11:28,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:28,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:11:28,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:28,974 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:11:28,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:11:28,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749231657] [2023-11-12 00:11:28,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749231657] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:11:28,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:11:28,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:11:28,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896332274] [2023-11-12 00:11:28,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:11:28,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:11:28,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:11:28,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:11:28,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:11:28,977 INFO L87 Difference]: Start difference. First operand 12444 states and 15577 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:11:29,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:11:29,859 INFO L93 Difference]: Finished difference Result 29608 states and 37346 transitions. [2023-11-12 00:11:29,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:11:29,860 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 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 218 [2023-11-12 00:11:29,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:11:29,897 INFO L225 Difference]: With dead ends: 29608 [2023-11-12 00:11:29,898 INFO L226 Difference]: Without dead ends: 17880 [2023-11-12 00:11:29,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:11:29,913 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 86 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 00:11:29,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 73 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 00:11:29,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17880 states. [2023-11-12 00:11:30,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17880 to 16591. [2023-11-12 00:11:30,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16591 states, 16590 states have (on average 1.274502712477396) internal successors, (21144), 16590 states have internal predecessors, (21144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:11:30,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16591 states to 16591 states and 21144 transitions. [2023-11-12 00:11:30,401 INFO L78 Accepts]: Start accepts. Automaton has 16591 states and 21144 transitions. Word has length 218 [2023-11-12 00:11:30,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:11:30,402 INFO L495 AbstractCegarLoop]: Abstraction has 16591 states and 21144 transitions. [2023-11-12 00:11:30,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:11:30,402 INFO L276 IsEmpty]: Start isEmpty. Operand 16591 states and 21144 transitions. [2023-11-12 00:11:30,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2023-11-12 00:11:30,429 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:11:30,429 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, 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, 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, 1, 1, 1, 1, 1] [2023-11-12 00:11:30,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-12 00:11:30,430 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:11:30,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:11:30,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1952282051, now seen corresponding path program 1 times [2023-11-12 00:11:30,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:11:30,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753143980] [2023-11-12 00:11:30,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:30,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:11:30,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:30,841 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:11:30,841 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:11:30,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753143980] [2023-11-12 00:11:30,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753143980] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:11:30,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:11:30,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:11:30,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737134065] [2023-11-12 00:11:30,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:11:30,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:11:30,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:11:30,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:11:30,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:11:30,844 INFO L87 Difference]: Start difference. First operand 16591 states and 21144 transitions. Second operand has 4 states, 4 states have (on average 60.75) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:11:32,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:11:32,363 INFO L93 Difference]: Finished difference Result 41904 states and 53411 transitions. [2023-11-12 00:11:32,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:11:32,364 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 60.75) internal successors, (243), 3 states have internal predecessors, (243), 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 243 [2023-11-12 00:11:32,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:11:32,414 INFO L225 Difference]: With dead ends: 41904 [2023-11-12 00:11:32,415 INFO L226 Difference]: Without dead ends: 26172 [2023-11-12 00:11:32,435 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 [2023-11-12 00:11:32,436 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 195 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:11:32,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 76 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-12 00:11:32,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26172 states. [2023-11-12 00:11:32,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26172 to 26172. [2023-11-12 00:11:32,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26172 states, 26171 states have (on average 1.2395781590309884) internal successors, (32441), 26171 states have internal predecessors, (32441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:11:32,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26172 states to 26172 states and 32441 transitions. [2023-11-12 00:11:32,935 INFO L78 Accepts]: Start accepts. Automaton has 26172 states and 32441 transitions. Word has length 243 [2023-11-12 00:11:32,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:11:32,936 INFO L495 AbstractCegarLoop]: Abstraction has 26172 states and 32441 transitions. [2023-11-12 00:11:32,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.75) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:11:32,937 INFO L276 IsEmpty]: Start isEmpty. Operand 26172 states and 32441 transitions. [2023-11-12 00:11:33,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2023-11-12 00:11:33,053 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:11:33,054 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 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, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:11:33,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-12 00:11:33,054 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:11:33,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:11:33,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1077318633, now seen corresponding path program 1 times [2023-11-12 00:11:33,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:11:33,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307457403] [2023-11-12 00:11:33,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:33,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:11:33,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:33,568 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 102 proven. 6 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2023-11-12 00:11:33,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:11:33,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307457403] [2023-11-12 00:11:33,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307457403] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:11:33,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29373648] [2023-11-12 00:11:33,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:33,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:11:33,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2ec841-63c1-4697-b626-ead53b0aba87/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:11:33,571 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2ec841-63c1-4697-b626-ead53b0aba87/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:11:33,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2ec841-63c1-4697-b626-ead53b0aba87/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:11:33,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:33,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:11:33,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:11:34,113 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-12 00:11:34,114 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:11:34,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29373648] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:11:34,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:11:34,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-12 00:11:34,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758015009] [2023-11-12 00:11:34,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:11:34,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:11:34,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:11:34,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:11:34,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:11:34,117 INFO L87 Difference]: Start difference. First operand 26172 states and 32441 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:11:35,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:11:35,328 INFO L93 Difference]: Finished difference Result 51628 states and 64128 transitions. [2023-11-12 00:11:35,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:11:35,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 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 249 [2023-11-12 00:11:35,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:11:35,388 INFO L225 Difference]: With dead ends: 51628 [2023-11-12 00:11:35,388 INFO L226 Difference]: Without dead ends: 25743 [2023-11-12 00:11:35,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:11:35,405 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 00:11:35,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 230 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 00:11:35,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25743 states. [2023-11-12 00:11:35,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25743 to 25743. [2023-11-12 00:11:35,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25743 states, 25742 states have (on average 1.2308289954160516) internal successors, (31684), 25742 states have internal predecessors, (31684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:11:36,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25743 states to 25743 states and 31684 transitions. [2023-11-12 00:11:36,044 INFO L78 Accepts]: Start accepts. Automaton has 25743 states and 31684 transitions. Word has length 249 [2023-11-12 00:11:36,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:11:36,045 INFO L495 AbstractCegarLoop]: Abstraction has 25743 states and 31684 transitions. [2023-11-12 00:11:36,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:11:36,045 INFO L276 IsEmpty]: Start isEmpty. Operand 25743 states and 31684 transitions. [2023-11-12 00:11:36,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2023-11-12 00:11:36,080 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:11:36,080 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:11:36,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2ec841-63c1-4697-b626-ead53b0aba87/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:11:36,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2ec841-63c1-4697-b626-ead53b0aba87/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-12 00:11:36,288 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:11:36,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:11:36,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1878476154, now seen corresponding path program 1 times [2023-11-12 00:11:36,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:11:36,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987987288] [2023-11-12 00:11:36,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:36,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:11:36,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:36,689 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-11-12 00:11:36,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:11:36,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987987288] [2023-11-12 00:11:36,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987987288] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:11:36,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:11:36,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:11:36,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313171725] [2023-11-12 00:11:36,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:11:36,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:11:36,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:11:36,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:11:36,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:11:36,692 INFO L87 Difference]: Start difference. First operand 25743 states and 31684 transitions. Second operand has 4 states, 4 states have (on average 46.25) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:11:37,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:11:37,931 INFO L93 Difference]: Finished difference Result 74939 states and 92238 transitions. [2023-11-12 00:11:37,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:11:37,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 255 [2023-11-12 00:11:37,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:11:38,028 INFO L225 Difference]: With dead ends: 74939 [2023-11-12 00:11:38,028 INFO L226 Difference]: Without dead ends: 49912 [2023-11-12 00:11:38,042 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 [2023-11-12 00:11:38,042 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 501 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 00:11:38,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [501 Valid, 242 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 00:11:38,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49912 states. [2023-11-12 00:11:38,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49912 to 49910. [2023-11-12 00:11:38,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49910 states, 49909 states have (on average 1.2282153519405317) internal successors, (61299), 49909 states have internal predecessors, (61299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:11:38,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49910 states to 49910 states and 61299 transitions. [2023-11-12 00:11:38,863 INFO L78 Accepts]: Start accepts. Automaton has 49910 states and 61299 transitions. Word has length 255 [2023-11-12 00:11:38,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:11:38,864 INFO L495 AbstractCegarLoop]: Abstraction has 49910 states and 61299 transitions. [2023-11-12 00:11:38,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:11:38,864 INFO L276 IsEmpty]: Start isEmpty. Operand 49910 states and 61299 transitions. [2023-11-12 00:11:38,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2023-11-12 00:11:38,896 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:11:38,896 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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] [2023-11-12 00:11:38,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-12 00:11:38,897 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:11:38,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:11:38,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1192858693, now seen corresponding path program 1 times [2023-11-12 00:11:38,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:11:38,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130471853] [2023-11-12 00:11:38,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:38,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:11:39,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:39,666 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:11:39,666 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:11:39,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130471853] [2023-11-12 00:11:39,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130471853] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:11:39,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988718732] [2023-11-12 00:11:39,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:39,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:11:39,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2ec841-63c1-4697-b626-ead53b0aba87/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:11:39,668 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2ec841-63c1-4697-b626-ead53b0aba87/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:11:39,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2ec841-63c1-4697-b626-ead53b0aba87/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:11:39,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:39,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:11:39,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:11:40,306 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 00:11:40,306 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:11:40,665 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 00:11:40,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988718732] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:11:40,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2078750242] [2023-11-12 00:11:40,700 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2023-11-12 00:11:40,700 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:11:40,704 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:11:40,710 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:11:40,711 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs