./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label37.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd25fa08-ed4c-436d-a936-8f9450813532/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd25fa08-ed4c-436d-a936-8f9450813532/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd25fa08-ed4c-436d-a936-8f9450813532/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd25fa08-ed4c-436d-a936-8f9450813532/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label37.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd25fa08-ed4c-436d-a936-8f9450813532/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd25fa08-ed4c-436d-a936-8f9450813532/bin/utaipan-verify-SwPr7d2a91 --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 1c0cc6929709cefe19ab2aef19e8ee66797622b8a8e015c421c466573f22c0b0 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:00:30,090 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:00:30,176 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd25fa08-ed4c-436d-a936-8f9450813532/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-25 00:00:30,183 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:00:30,183 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:00:30,213 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:00:30,214 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:00:30,215 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:00:30,215 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:00:30,216 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:00:30,217 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:00:30,217 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:00:30,218 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:00:30,218 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:00:30,219 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:00:30,219 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:00:30,220 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:00:30,221 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:00:30,221 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:00:30,222 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:00:30,222 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:00:30,227 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:00:30,228 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:00:30,228 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:00:30,229 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-25 00:00:30,229 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:00:30,230 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-25 00:00:30,230 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:00:30,230 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:00:30,231 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:00:30,231 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:00:30,232 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-25 00:00:30,232 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:00:30,232 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:00:30,233 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:00:30,233 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:00:30,234 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:00:30,234 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:00:30,234 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:00:30,235 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:00:30,235 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:00:30,237 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:00:30,238 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:00:30,238 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:00:30,238 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:00:30,238 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:00:30,239 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:00:30,239 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_bd25fa08-ed4c-436d-a936-8f9450813532/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd25fa08-ed4c-436d-a936-8f9450813532/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c0cc6929709cefe19ab2aef19e8ee66797622b8a8e015c421c466573f22c0b0 [2023-11-25 00:00:30,490 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:00:30,511 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:00:30,514 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:00:30,515 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:00:30,516 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:00:30,517 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd25fa08-ed4c-436d-a936-8f9450813532/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/eca-rers2012/Problem03_label37.c [2023-11-25 00:00:33,602 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:00:34,090 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:00:34,091 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd25fa08-ed4c-436d-a936-8f9450813532/sv-benchmarks/c/eca-rers2012/Problem03_label37.c [2023-11-25 00:00:34,115 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd25fa08-ed4c-436d-a936-8f9450813532/bin/utaipan-verify-SwPr7d2a91/data/a55d819f1/a671c5df50ab462d806e3af7434f014c/FLAG55b6fc9c5 [2023-11-25 00:00:34,132 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd25fa08-ed4c-436d-a936-8f9450813532/bin/utaipan-verify-SwPr7d2a91/data/a55d819f1/a671c5df50ab462d806e3af7434f014c [2023-11-25 00:00:34,140 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:00:34,142 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:00:34,144 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:00:34,144 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:00:34,150 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:00:34,151 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:00:34" (1/1) ... [2023-11-25 00:00:34,152 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@638c613a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:34, skipping insertion in model container [2023-11-25 00:00:34,152 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:00:34" (1/1) ... [2023-11-25 00:00:34,254 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:00:34,943 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_bd25fa08-ed4c-436d-a936-8f9450813532/sv-benchmarks/c/eca-rers2012/Problem03_label37.c[54326,54339] [2023-11-25 00:00:34,998 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:00:35,017 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:00:35,274 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_bd25fa08-ed4c-436d-a936-8f9450813532/sv-benchmarks/c/eca-rers2012/Problem03_label37.c[54326,54339] [2023-11-25 00:00:35,296 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:00:35,322 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:00:35,322 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:35 WrapperNode [2023-11-25 00:00:35,323 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:00:35,325 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:00:35,326 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:00:35,326 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:00:35,335 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:35" (1/1) ... [2023-11-25 00:00:35,383 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:35" (1/1) ... [2023-11-25 00:00:35,485 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1772 [2023-11-25 00:00:35,486 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:00:35,487 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:00:35,487 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:00:35,487 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:00:35,498 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:35" (1/1) ... [2023-11-25 00:00:35,499 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:35" (1/1) ... [2023-11-25 00:00:35,507 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:35" (1/1) ... [2023-11-25 00:00:35,508 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:35" (1/1) ... [2023-11-25 00:00:35,558 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:35" (1/1) ... [2023-11-25 00:00:35,570 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:35" (1/1) ... [2023-11-25 00:00:35,580 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:35" (1/1) ... [2023-11-25 00:00:35,593 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:35" (1/1) ... [2023-11-25 00:00:35,610 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:00:35,611 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:00:35,611 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:00:35,611 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:00:35,612 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:35" (1/1) ... [2023-11-25 00:00:35,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:00:35,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd25fa08-ed4c-436d-a936-8f9450813532/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:00:35,650 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd25fa08-ed4c-436d-a936-8f9450813532/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:00:35,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd25fa08-ed4c-436d-a936-8f9450813532/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:00:35,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:00:35,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:00:35,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:00:35,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:00:35,793 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:00:35,796 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:00:37,936 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:00:38,374 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:00:38,374 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-25 00:00:38,376 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:00:38 BoogieIcfgContainer [2023-11-25 00:00:38,376 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:00:38,382 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:00:38,382 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:00:38,385 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:00:38,385 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:00:34" (1/3) ... [2023-11-25 00:00:38,386 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62af6513 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:00:38, skipping insertion in model container [2023-11-25 00:00:38,387 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:35" (2/3) ... [2023-11-25 00:00:38,388 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62af6513 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:00:38, skipping insertion in model container [2023-11-25 00:00:38,389 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:00:38" (3/3) ... [2023-11-25 00:00:38,390 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label37.c [2023-11-25 00:00:38,412 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:00:38,412 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-25 00:00:38,469 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:00:38,475 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;@396fa010, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:00:38,475 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-25 00:00:38,481 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) [2023-11-25 00:00:38,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-11-25 00:00:38,498 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:00:38,499 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] [2023-11-25 00:00:38,500 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:00:38,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:00:38,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1070325199, now seen corresponding path program 1 times [2023-11-25 00:00:38,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:00:38,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804630161] [2023-11-25 00:00:38,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:00:38,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:00:38,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:00:39,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:00:39,573 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:00:39,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804630161] [2023-11-25 00:00:39,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804630161] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:00:39,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:00:39,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-25 00:00:39,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169876828] [2023-11-25 00:00:39,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:00:39,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:00:39,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:00:39,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:00:39,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:00:39,632 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) [2023-11-25 00:00:40,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:00:40,682 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2023-11-25 00:00:40,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:00:40,685 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 [2023-11-25 00:00:40,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:00:40,705 INFO L225 Difference]: With dead ends: 440 [2023-11-25 00:00:40,705 INFO L226 Difference]: Without dead ends: 289 [2023-11-25 00:00:40,710 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 [2023-11-25 00:00:40,716 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 15 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:00:40,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 57 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-25 00:00:40,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2023-11-25 00:00:40,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2023-11-25 00:00:40,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.9270833333333333) internal successors, (555), 288 states have internal predecessors, (555), 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) [2023-11-25 00:00:40,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 555 transitions. [2023-11-25 00:00:40,792 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 555 transitions. Word has length 143 [2023-11-25 00:00:40,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:00:40,793 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 555 transitions. [2023-11-25 00:00:40,794 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) [2023-11-25 00:00:40,794 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 555 transitions. [2023-11-25 00:00:40,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-11-25 00:00:40,802 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:00:40,803 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] [2023-11-25 00:00:40,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-25 00:00:40,803 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:00:40,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:00:40,804 INFO L85 PathProgramCache]: Analyzing trace with hash -192706395, now seen corresponding path program 1 times [2023-11-25 00:00:40,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:00:40,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434494462] [2023-11-25 00:00:40,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:00:40,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:00:40,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:00:41,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:00:41,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:00:41,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434494462] [2023-11-25 00:00:41,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434494462] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:00:41,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:00:41,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-25 00:00:41,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662284018] [2023-11-25 00:00:41,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:00:41,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:00:41,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:00:41,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:00:41,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:00:41,633 INFO L87 Difference]: Start difference. First operand 289 states and 555 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) [2023-11-25 00:00:42,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:00:42,531 INFO L93 Difference]: Finished difference Result 863 states and 1662 transitions. [2023-11-25 00:00:42,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:00:42,532 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 [2023-11-25 00:00:42,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:00:42,536 INFO L225 Difference]: With dead ends: 863 [2023-11-25 00:00:42,537 INFO L226 Difference]: Without dead ends: 575 [2023-11-25 00:00:42,539 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 [2023-11-25 00:00:42,541 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 147 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-25 00:00:42,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 40 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-25 00:00:42,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2023-11-25 00:00:42,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2023-11-25 00:00:42,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.8153310104529616) internal successors, (1042), 574 states have internal predecessors, (1042), 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) [2023-11-25 00:00:42,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1042 transitions. [2023-11-25 00:00:42,569 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1042 transitions. Word has length 147 [2023-11-25 00:00:42,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:00:42,570 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 1042 transitions. [2023-11-25 00:00:42,570 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) [2023-11-25 00:00:42,570 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1042 transitions. [2023-11-25 00:00:42,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-11-25 00:00:42,577 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:00:42,577 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:00:42,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-25 00:00:42,578 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:00:42,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:00:42,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1049603280, now seen corresponding path program 1 times [2023-11-25 00:00:42,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:00:42,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135020695] [2023-11-25 00:00:42,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:00:42,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:00:42,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:00:42,790 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:00:42,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:00:42,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135020695] [2023-11-25 00:00:42,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135020695] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:00:42,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:00:42,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-25 00:00:42,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826960757] [2023-11-25 00:00:42,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:00:42,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:00:42,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:00:42,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:00:42,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:00:42,800 INFO L87 Difference]: Start difference. First operand 575 states and 1042 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 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) [2023-11-25 00:00:43,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:00:43,751 INFO L93 Difference]: Finished difference Result 1721 states and 3123 transitions. [2023-11-25 00:00:43,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:00:43,752 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 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 151 [2023-11-25 00:00:43,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:00:43,761 INFO L225 Difference]: With dead ends: 1721 [2023-11-25 00:00:43,762 INFO L226 Difference]: Without dead ends: 1147 [2023-11-25 00:00:43,770 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 [2023-11-25 00:00:43,772 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 157 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-25 00:00:43,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 26 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-25 00:00:43,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2023-11-25 00:00:43,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1147. [2023-11-25 00:00:43,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.7757417102966842) internal successors, (2035), 1146 states have internal predecessors, (2035), 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) [2023-11-25 00:00:43,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 2035 transitions. [2023-11-25 00:00:43,823 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 2035 transitions. Word has length 151 [2023-11-25 00:00:43,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:00:43,832 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 2035 transitions. [2023-11-25 00:00:43,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 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) [2023-11-25 00:00:43,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 2035 transitions. [2023-11-25 00:00:43,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-11-25 00:00:43,847 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:00:43,847 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:00:43,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-25 00:00:43,848 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:00:43,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:00:43,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1948904588, now seen corresponding path program 1 times [2023-11-25 00:00:43,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:00:43,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821457229] [2023-11-25 00:00:43,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:00:43,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:00:43,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:00:44,103 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-25 00:00:44,104 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:00:44,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821457229] [2023-11-25 00:00:44,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821457229] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:00:44,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:00:44,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-25 00:00:44,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232892759] [2023-11-25 00:00:44,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:00:44,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:00:44,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:00:44,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:00:44,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:00:44,108 INFO L87 Difference]: Start difference. First operand 1147 states and 2035 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 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) [2023-11-25 00:00:45,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:00:45,133 INFO L93 Difference]: Finished difference Result 3437 states and 6102 transitions. [2023-11-25 00:00:45,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:00:45,133 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 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 155 [2023-11-25 00:00:45,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:00:45,147 INFO L225 Difference]: With dead ends: 3437 [2023-11-25 00:00:45,147 INFO L226 Difference]: Without dead ends: 2291 [2023-11-25 00:00:45,150 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 [2023-11-25 00:00:45,151 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 164 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:00:45,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 49 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-25 00:00:45,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2023-11-25 00:00:45,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2291. [2023-11-25 00:00:45,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 1.6336244541484717) internal successors, (3741), 2290 states have internal predecessors, (3741), 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) [2023-11-25 00:00:45,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 3741 transitions. [2023-11-25 00:00:45,216 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 3741 transitions. Word has length 155 [2023-11-25 00:00:45,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:00:45,216 INFO L495 AbstractCegarLoop]: Abstraction has 2291 states and 3741 transitions. [2023-11-25 00:00:45,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 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) [2023-11-25 00:00:45,217 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 3741 transitions. [2023-11-25 00:00:45,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-11-25 00:00:45,223 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:00:45,223 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:00:45,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-25 00:00:45,224 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:00:45,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:00:45,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1675520658, now seen corresponding path program 1 times [2023-11-25 00:00:45,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:00:45,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258045954] [2023-11-25 00:00:45,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:00:45,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:00:45,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:00:45,635 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:00:45,636 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:00:45,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258045954] [2023-11-25 00:00:45,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258045954] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:00:45,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252262073] [2023-11-25 00:00:45,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:00:45,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:00:45,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd25fa08-ed4c-436d-a936-8f9450813532/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:00:45,648 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd25fa08-ed4c-436d-a936-8f9450813532/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:00:45,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd25fa08-ed4c-436d-a936-8f9450813532/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-25 00:00:45,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:00:45,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-25 00:00:45,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:00:45,970 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-25 00:00:45,970 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:00:45,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252262073] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:00:45,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:00:45,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-25 00:00:45,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762071647] [2023-11-25 00:00:45,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:00:45,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:00:45,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:00:45,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:00:45,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:00:45,974 INFO L87 Difference]: Start difference. First operand 2291 states and 3741 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 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) [2023-11-25 00:00:46,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:00:46,980 INFO L93 Difference]: Finished difference Result 6154 states and 10124 transitions. [2023-11-25 00:00:46,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:00:46,981 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 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 165 [2023-11-25 00:00:46,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:00:47,003 INFO L225 Difference]: With dead ends: 6154 [2023-11-25 00:00:47,003 INFO L226 Difference]: Without dead ends: 3864 [2023-11-25 00:00:47,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:00:47,008 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 149 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-25 00:00:47,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 262 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-25 00:00:47,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3864 states. [2023-11-25 00:00:47,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3864 to 3578. [2023-11-25 00:00:47,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3578 states, 3577 states have (on average 1.477495107632094) internal successors, (5285), 3577 states have internal predecessors, (5285), 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) [2023-11-25 00:00:47,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 5285 transitions. [2023-11-25 00:00:47,108 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 5285 transitions. Word has length 165 [2023-11-25 00:00:47,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:00:47,108 INFO L495 AbstractCegarLoop]: Abstraction has 3578 states and 5285 transitions. [2023-11-25 00:00:47,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 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) [2023-11-25 00:00:47,109 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 5285 transitions. [2023-11-25 00:00:47,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-11-25 00:00:47,118 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:00:47,118 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:00:47,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd25fa08-ed4c-436d-a936-8f9450813532/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-25 00:00:47,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd25fa08-ed4c-436d-a936-8f9450813532/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:00:47,324 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:00:47,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:00:47,325 INFO L85 PathProgramCache]: Analyzing trace with hash 456172730, now seen corresponding path program 1 times [2023-11-25 00:00:47,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:00:47,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327123979] [2023-11-25 00:00:47,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:00:47,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:00:47,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:00:47,744 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:00:47,744 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:00:47,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327123979] [2023-11-25 00:00:47,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327123979] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:00:47,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:00:47,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-25 00:00:47,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611212991] [2023-11-25 00:00:47,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:00:47,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:00:47,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:00:47,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:00:47,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:00:47,749 INFO L87 Difference]: Start difference. First operand 3578 states and 5285 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 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) [2023-11-25 00:00:48,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:00:48,710 INFO L93 Difference]: Finished difference Result 10017 states and 14689 transitions. [2023-11-25 00:00:48,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:00:48,711 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 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 166 [2023-11-25 00:00:48,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:00:48,745 INFO L225 Difference]: With dead ends: 10017 [2023-11-25 00:00:48,745 INFO L226 Difference]: Without dead ends: 6440 [2023-11-25 00:00:48,750 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 [2023-11-25 00:00:48,751 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 173 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-25 00:00:48,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 55 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-25 00:00:48,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6440 states. [2023-11-25 00:00:48,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6440 to 6438. [2023-11-25 00:00:48,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6438 states, 6437 states have (on average 1.4436849464036041) internal successors, (9293), 6437 states have internal predecessors, (9293), 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) [2023-11-25 00:00:48,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6438 states to 6438 states and 9293 transitions. [2023-11-25 00:00:48,982 INFO L78 Accepts]: Start accepts. Automaton has 6438 states and 9293 transitions. Word has length 166 [2023-11-25 00:00:48,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:00:48,983 INFO L495 AbstractCegarLoop]: Abstraction has 6438 states and 9293 transitions. [2023-11-25 00:00:48,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 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) [2023-11-25 00:00:48,984 INFO L276 IsEmpty]: Start isEmpty. Operand 6438 states and 9293 transitions. [2023-11-25 00:00:48,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-11-25 00:00:48,998 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:00:48,998 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 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] [2023-11-25 00:00:48,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-25 00:00:48,999 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:00:48,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:00:49,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1206926878, now seen corresponding path program 1 times [2023-11-25 00:00:49,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:00:49,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726794270] [2023-11-25 00:00:49,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:00:49,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:00:49,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:00:49,212 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-25 00:00:49,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:00:49,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726794270] [2023-11-25 00:00:49,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726794270] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:00:49,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:00:49,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-25 00:00:49,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139521193] [2023-11-25 00:00:49,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:00:49,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:00:49,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:00:49,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:00:49,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:00:49,218 INFO L87 Difference]: Start difference. First operand 6438 states and 9293 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 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) [2023-11-25 00:00:49,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:00:49,803 INFO L93 Difference]: Finished difference Result 12303 states and 17827 transitions. [2023-11-25 00:00:49,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:00:49,804 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 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 176 [2023-11-25 00:00:49,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:00:49,840 INFO L225 Difference]: With dead ends: 12303 [2023-11-25 00:00:49,840 INFO L226 Difference]: Without dead ends: 6438 [2023-11-25 00:00:49,853 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 [2023-11-25 00:00:49,854 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 240 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 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, 0.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:00:49,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 4 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-25 00:00:49,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6438 states. [2023-11-25 00:00:50,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6438 to 6438. [2023-11-25 00:00:50,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6438 states, 6437 states have (on average 1.3963026254466366) internal successors, (8988), 6437 states have internal predecessors, (8988), 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) [2023-11-25 00:00:50,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6438 states to 6438 states and 8988 transitions. [2023-11-25 00:00:50,092 INFO L78 Accepts]: Start accepts. Automaton has 6438 states and 8988 transitions. Word has length 176 [2023-11-25 00:00:50,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:00:50,093 INFO L495 AbstractCegarLoop]: Abstraction has 6438 states and 8988 transitions. [2023-11-25 00:00:50,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 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) [2023-11-25 00:00:50,093 INFO L276 IsEmpty]: Start isEmpty. Operand 6438 states and 8988 transitions. [2023-11-25 00:00:50,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2023-11-25 00:00:50,108 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:00:50,109 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:00:50,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-25 00:00:50,110 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:00:50,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:00:50,111 INFO L85 PathProgramCache]: Analyzing trace with hash 458341321, now seen corresponding path program 1 times [2023-11-25 00:00:50,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:00:50,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897222559] [2023-11-25 00:00:50,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:00:50,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:00:50,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:00:50,659 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-25 00:00:50,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:00:50,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897222559] [2023-11-25 00:00:50,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897222559] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:00:50,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:00:50,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-25 00:00:50,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312955820] [2023-11-25 00:00:50,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:00:50,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:00:50,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:00:50,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:00:50,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:00:50,662 INFO L87 Difference]: Start difference. First operand 6438 states and 8988 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 2 states have internal predecessors, (176), 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) [2023-11-25 00:00:51,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:00:51,718 INFO L93 Difference]: Finished difference Result 15308 states and 21689 transitions. [2023-11-25 00:00:51,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:00:51,719 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 2 states have internal predecessors, (176), 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 190 [2023-11-25 00:00:51,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:00:51,786 INFO L225 Difference]: With dead ends: 15308 [2023-11-25 00:00:51,786 INFO L226 Difference]: Without dead ends: 9443 [2023-11-25 00:00:51,797 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 [2023-11-25 00:00:51,798 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 130 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-25 00:00:51,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 74 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-25 00:00:51,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9443 states. [2023-11-25 00:00:52,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9443 to 9298. [2023-11-25 00:00:52,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9298 states, 9297 states have (on average 1.4242228675916961) internal successors, (13241), 9297 states have internal predecessors, (13241), 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) [2023-11-25 00:00:52,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9298 states to 9298 states and 13241 transitions. [2023-11-25 00:00:52,075 INFO L78 Accepts]: Start accepts. Automaton has 9298 states and 13241 transitions. Word has length 190 [2023-11-25 00:00:52,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:00:52,076 INFO L495 AbstractCegarLoop]: Abstraction has 9298 states and 13241 transitions. [2023-11-25 00:00:52,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 2 states have internal predecessors, (176), 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) [2023-11-25 00:00:52,076 INFO L276 IsEmpty]: Start isEmpty. Operand 9298 states and 13241 transitions. [2023-11-25 00:00:52,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2023-11-25 00:00:52,097 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:00:52,098 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:00:52,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-25 00:00:52,098 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:00:52,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:00:52,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1270724574, now seen corresponding path program 1 times [2023-11-25 00:00:52,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:00:52,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810514956] [2023-11-25 00:00:52,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:00:52,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:00:52,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:00:52,721 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 50 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-25 00:00:52,721 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:00:52,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810514956] [2023-11-25 00:00:52,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810514956] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:00:52,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335198015] [2023-11-25 00:00:52,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:00:52,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:00:52,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd25fa08-ed4c-436d-a936-8f9450813532/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:00:52,725 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd25fa08-ed4c-436d-a936-8f9450813532/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:00:52,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd25fa08-ed4c-436d-a936-8f9450813532/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-25 00:00:52,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:00:52,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-25 00:00:52,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:00:53,030 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-25 00:00:53,032 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:00:53,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335198015] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:00:53,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:00:53,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-11-25 00:00:53,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605969387] [2023-11-25 00:00:53,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:00:53,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:00:53,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:00:53,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:00:53,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:00:53,044 INFO L87 Difference]: Start difference. First operand 9298 states and 13241 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 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) [2023-11-25 00:00:53,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:00:53,963 INFO L93 Difference]: Finished difference Result 24315 states and 34548 transitions. [2023-11-25 00:00:53,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:00:53,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 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 195 [2023-11-25 00:00:53,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:00:53,996 INFO L225 Difference]: With dead ends: 24315 [2023-11-25 00:00:53,996 INFO L226 Difference]: Without dead ends: 15018 [2023-11-25 00:00:54,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:00:54,009 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 146 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-25 00:00:54,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 62 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-25 00:00:54,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15018 states. [2023-11-25 00:00:54,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15018 to 14446. [2023-11-25 00:00:54,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14446 states, 14445 states have (on average 1.3829006576670129) internal successors, (19976), 14445 states have internal predecessors, (19976), 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) [2023-11-25 00:00:54,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14446 states to 14446 states and 19976 transitions. [2023-11-25 00:00:54,389 INFO L78 Accepts]: Start accepts. Automaton has 14446 states and 19976 transitions. Word has length 195 [2023-11-25 00:00:54,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:00:54,390 INFO L495 AbstractCegarLoop]: Abstraction has 14446 states and 19976 transitions. [2023-11-25 00:00:54,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 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) [2023-11-25 00:00:54,390 INFO L276 IsEmpty]: Start isEmpty. Operand 14446 states and 19976 transitions. [2023-11-25 00:00:54,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-11-25 00:00:54,412 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:00:54,412 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:00:54,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd25fa08-ed4c-436d-a936-8f9450813532/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-25 00:00:54,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd25fa08-ed4c-436d-a936-8f9450813532/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-25 00:00:54,619 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:00:54,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:00:54,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1533223761, now seen corresponding path program 1 times [2023-11-25 00:00:54,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:00:54,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133369983] [2023-11-25 00:00:54,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:00:54,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:00:54,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:00:55,179 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-25 00:00:55,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:00:55,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133369983] [2023-11-25 00:00:55,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133369983] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:00:55,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:00:55,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-25 00:00:55,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662801850] [2023-11-25 00:00:55,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:00:55,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:00:55,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:00:55,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:00:55,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:00:55,182 INFO L87 Difference]: Start difference. First operand 14446 states and 19976 transitions. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 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) [2023-11-25 00:00:56,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:00:56,162 INFO L93 Difference]: Finished difference Result 29892 states and 41319 transitions. [2023-11-25 00:00:56,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:00:56,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 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 203 [2023-11-25 00:00:56,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:00:56,201 INFO L225 Difference]: With dead ends: 29892 [2023-11-25 00:00:56,202 INFO L226 Difference]: Without dead ends: 16448 [2023-11-25 00:00:56,219 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 [2023-11-25 00:00:56,220 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 116 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-25 00:00:56,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 89 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-25 00:00:56,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16448 states. [2023-11-25 00:00:56,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16448 to 16448. [2023-11-25 00:00:56,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16448 states, 16447 states have (on average 1.3706451024502948) internal successors, (22543), 16447 states have internal predecessors, (22543), 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) [2023-11-25 00:00:56,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16448 states to 16448 states and 22543 transitions. [2023-11-25 00:00:56,694 INFO L78 Accepts]: Start accepts. Automaton has 16448 states and 22543 transitions. Word has length 203 [2023-11-25 00:00:56,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:00:56,695 INFO L495 AbstractCegarLoop]: Abstraction has 16448 states and 22543 transitions. [2023-11-25 00:00:56,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 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) [2023-11-25 00:00:56,695 INFO L276 IsEmpty]: Start isEmpty. Operand 16448 states and 22543 transitions. [2023-11-25 00:00:56,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2023-11-25 00:00:56,727 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:00:56,727 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] [2023-11-25 00:00:56,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-25 00:00:56,728 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:00:56,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:00:56,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1734308480, now seen corresponding path program 1 times [2023-11-25 00:00:56,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:00:56,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620309993] [2023-11-25 00:00:56,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:00:56,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:00:56,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:00:57,467 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 72 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-25 00:00:57,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:00:57,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620309993] [2023-11-25 00:00:57,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620309993] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:00:57,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401082648] [2023-11-25 00:00:57,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:00:57,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:00:57,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd25fa08-ed4c-436d-a936-8f9450813532/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:00:57,493 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd25fa08-ed4c-436d-a936-8f9450813532/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:00:57,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd25fa08-ed4c-436d-a936-8f9450813532/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-25 00:00:57,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:00:57,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-25 00:00:57,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:00:57,820 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-25 00:00:57,824 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:00:57,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401082648] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:00:57,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:00:57,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-25 00:00:57,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022520598] [2023-11-25 00:00:57,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:00:57,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:00:57,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:00:57,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:00:57,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:00:57,827 INFO L87 Difference]: Start difference. First operand 16448 states and 22543 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) [2023-11-25 00:00:58,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:00:58,890 INFO L93 Difference]: Finished difference Result 35755 states and 50135 transitions. [2023-11-25 00:00:58,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:00:58,891 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 [2023-11-25 00:00:58,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:00:58,928 INFO L225 Difference]: With dead ends: 35755 [2023-11-25 00:00:58,929 INFO L226 Difference]: Without dead ends: 19880 [2023-11-25 00:00:58,949 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 [2023-11-25 00:00:58,950 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, 0.8s IncrementalHoareTripleChecker+Time [2023-11-25 00:00:58,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 85 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-25 00:00:58,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19880 states. [2023-11-25 00:00:59,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19880 to 17592. [2023-11-25 00:00:59,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17592 states, 17591 states have (on average 1.3085100335398783) internal successors, (23018), 17591 states have internal predecessors, (23018), 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) [2023-11-25 00:00:59,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17592 states to 17592 states and 23018 transitions. [2023-11-25 00:00:59,298 INFO L78 Accepts]: Start accepts. Automaton has 17592 states and 23018 transitions. Word has length 210 [2023-11-25 00:00:59,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:00:59,299 INFO L495 AbstractCegarLoop]: Abstraction has 17592 states and 23018 transitions. [2023-11-25 00:00:59,299 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) [2023-11-25 00:00:59,299 INFO L276 IsEmpty]: Start isEmpty. Operand 17592 states and 23018 transitions. [2023-11-25 00:00:59,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2023-11-25 00:00:59,317 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:00:59,317 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:00:59,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd25fa08-ed4c-436d-a936-8f9450813532/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-25 00:00:59,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd25fa08-ed4c-436d-a936-8f9450813532/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-25 00:00:59,524 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:00:59,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:00:59,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1328219256, now seen corresponding path program 1 times [2023-11-25 00:00:59,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:00:59,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723023978] [2023-11-25 00:00:59,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:00:59,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:00:59,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:01,090 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 77 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:01:01,091 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:01:01,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723023978] [2023-11-25 00:01:01,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723023978] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:01:01,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086313301] [2023-11-25 00:01:01,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:01,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:01:01,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd25fa08-ed4c-436d-a936-8f9450813532/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:01:01,093 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd25fa08-ed4c-436d-a936-8f9450813532/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:01:01,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd25fa08-ed4c-436d-a936-8f9450813532/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-25 00:01:01,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:01,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-25 00:01:01,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:01:01,608 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:01:01,608 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:01:01,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086313301] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:01:01,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:01:01,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-11-25 00:01:01,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320533535] [2023-11-25 00:01:01,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:01:01,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:01:01,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:01:01,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:01:01,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:01:01,612 INFO L87 Difference]: Start difference. First operand 17592 states and 23018 transitions. Second operand has 4 states, 4 states have (on average 55.25) internal successors, (221), 3 states have internal predecessors, (221), 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) [2023-11-25 00:01:02,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:01:02,741 INFO L93 Difference]: Finished difference Result 39187 states and 50748 transitions. [2023-11-25 00:01:02,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:01:02,742 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.25) internal successors, (221), 3 states have internal predecessors, (221), 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 221 [2023-11-25 00:01:02,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:01:02,778 INFO L225 Difference]: With dead ends: 39187 [2023-11-25 00:01:02,778 INFO L226 Difference]: Without dead ends: 22168 [2023-11-25 00:01:02,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:01:02,793 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 302 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:01:02,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 89 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-25 00:01:02,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22168 states. [2023-11-25 00:01:03,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22168 to 18736. [2023-11-25 00:01:03,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18736 states, 18735 states have (on average 1.2836936215639179) internal successors, (24050), 18735 states have internal predecessors, (24050), 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) [2023-11-25 00:01:03,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18736 states to 18736 states and 24050 transitions. [2023-11-25 00:01:03,341 INFO L78 Accepts]: Start accepts. Automaton has 18736 states and 24050 transitions. Word has length 221 [2023-11-25 00:01:03,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:01:03,341 INFO L495 AbstractCegarLoop]: Abstraction has 18736 states and 24050 transitions. [2023-11-25 00:01:03,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.25) internal successors, (221), 3 states have internal predecessors, (221), 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) [2023-11-25 00:01:03,342 INFO L276 IsEmpty]: Start isEmpty. Operand 18736 states and 24050 transitions. [2023-11-25 00:01:03,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2023-11-25 00:01:03,372 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:01:03,372 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-25 00:01:03,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd25fa08-ed4c-436d-a936-8f9450813532/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-25 00:01:03,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd25fa08-ed4c-436d-a936-8f9450813532/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-25 00:01:03,579 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:01:03,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:01:03,579 INFO L85 PathProgramCache]: Analyzing trace with hash 606758661, now seen corresponding path program 1 times [2023-11-25 00:01:03,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:01:03,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354826891] [2023-11-25 00:01:03,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:03,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:01:03,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:03,924 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:01:03,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:01:03,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354826891] [2023-11-25 00:01:03,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354826891] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:01:03,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:01:03,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:01:03,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773657881] [2023-11-25 00:01:03,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:01:03,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:01:03,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:01:03,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:01:03,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:01:03,928 INFO L87 Difference]: Start difference. First operand 18736 states and 24050 transitions. Second operand has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 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) [2023-11-25 00:01:04,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:01:04,851 INFO L93 Difference]: Finished difference Result 36756 states and 47393 transitions. [2023-11-25 00:01:04,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:01:04,852 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 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 262 [2023-11-25 00:01:04,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:01:04,880 INFO L225 Difference]: With dead ends: 36756 [2023-11-25 00:01:04,880 INFO L226 Difference]: Without dead ends: 18307 [2023-11-25 00:01:04,891 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 [2023-11-25 00:01:04,892 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 148 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-25 00:01:04,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 208 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-25 00:01:04,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18307 states. [2023-11-25 00:01:05,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18307 to 16591. [2023-11-25 00:01:05,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16591 states, 16590 states have (on average 1.237673297166968) internal successors, (20533), 16590 states have internal predecessors, (20533), 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) [2023-11-25 00:01:05,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16591 states to 16591 states and 20533 transitions. [2023-11-25 00:01:05,359 INFO L78 Accepts]: Start accepts. Automaton has 16591 states and 20533 transitions. Word has length 262 [2023-11-25 00:01:05,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:01:05,359 INFO L495 AbstractCegarLoop]: Abstraction has 16591 states and 20533 transitions. [2023-11-25 00:01:05,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 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) [2023-11-25 00:01:05,360 INFO L276 IsEmpty]: Start isEmpty. Operand 16591 states and 20533 transitions. [2023-11-25 00:01:05,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2023-11-25 00:01:05,373 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:01:05,374 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] [2023-11-25 00:01:05,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-25 00:01:05,374 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:01:05,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:01:05,375 INFO L85 PathProgramCache]: Analyzing trace with hash -384351566, now seen corresponding path program 1 times [2023-11-25 00:01:05,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:01:05,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119988693] [2023-11-25 00:01:05,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:05,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:01:05,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:06,225 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:01:06,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:01:06,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119988693] [2023-11-25 00:01:06,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119988693] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:01:06,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484860595] [2023-11-25 00:01:06,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:06,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:01:06,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd25fa08-ed4c-436d-a936-8f9450813532/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:01:06,227 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd25fa08-ed4c-436d-a936-8f9450813532/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:01:06,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd25fa08-ed4c-436d-a936-8f9450813532/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-25 00:01:06,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:06,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-25 00:01:06,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:01:06,838 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-25 00:01:06,839 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:01:07,227 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-25 00:01:07,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484860595] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:01:07,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1038900460] [2023-11-25 00:01:07,258 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2023-11-25 00:01:07,258 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:01:07,262 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:01:07,267 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:01:07,267 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs