./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53bfa1d-f07f-4b4a-bfd8-4aae3046dd16/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53bfa1d-f07f-4b4a-bfd8-4aae3046dd16/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53bfa1d-f07f-4b4a-bfd8-4aae3046dd16/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53bfa1d-f07f-4b4a-bfd8-4aae3046dd16/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53bfa1d-f07f-4b4a-bfd8-4aae3046dd16/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53bfa1d-f07f-4b4a-bfd8-4aae3046dd16/bin/utaipan-verify-mE87zJ7Ire --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 ff8f3f7dc837fc67a7020fd9a9dd65135ef198f3603f2c180bcb5ad9943191ea --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:20:18,433 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:20:18,510 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53bfa1d-f07f-4b4a-bfd8-4aae3046dd16/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:20:18,517 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:20:18,517 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:20:18,564 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:20:18,565 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:20:18,566 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:20:18,567 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:20:18,567 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:20:18,568 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:20:18,569 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:20:18,569 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:20:18,570 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:20:18,570 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:20:18,571 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:20:18,571 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:20:18,572 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:20:18,573 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:20:18,573 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:20:18,574 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:20:18,575 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:20:18,575 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:20:18,576 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:20:18,577 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:20:18,577 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:20:18,578 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:20:18,578 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:20:18,579 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:20:18,580 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:20:18,580 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:20:18,588 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:20:18,588 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:20:18,589 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:20:18,589 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:20:18,590 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:20:18,590 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:20:18,591 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:20:18,591 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:20:18,592 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:20:18,592 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:20:18,594 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:20:18,595 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:20:18,595 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:20:18,595 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:20:18,596 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:20:18,596 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:20:18,596 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_f53bfa1d-f07f-4b4a-bfd8-4aae3046dd16/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53bfa1d-f07f-4b4a-bfd8-4aae3046dd16/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff8f3f7dc837fc67a7020fd9a9dd65135ef198f3603f2c180bcb5ad9943191ea [2023-11-23 21:20:18,865 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:20:18,898 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:20:18,901 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:20:18,902 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:20:18,903 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:20:18,904 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53bfa1d-f07f-4b4a-bfd8-4aae3046dd16/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-11-23 21:20:22,175 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:20:22,510 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:20:22,511 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53bfa1d-f07f-4b4a-bfd8-4aae3046dd16/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-11-23 21:20:22,525 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53bfa1d-f07f-4b4a-bfd8-4aae3046dd16/bin/utaipan-verify-mE87zJ7Ire/data/93de5e996/1b8c46f5b8934cfd8e91e346fec5e547/FLAG5a7ad196c [2023-11-23 21:20:22,544 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53bfa1d-f07f-4b4a-bfd8-4aae3046dd16/bin/utaipan-verify-mE87zJ7Ire/data/93de5e996/1b8c46f5b8934cfd8e91e346fec5e547 [2023-11-23 21:20:22,550 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:20:22,553 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:20:22,557 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:20:22,558 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:20:22,564 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:20:22,567 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:20:22" (1/1) ... [2023-11-23 21:20:22,569 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9b71718 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:20:22, skipping insertion in model container [2023-11-23 21:20:22,569 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:20:22" (1/1) ... [2023-11-23 21:20:22,664 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:20:23,008 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_f53bfa1d-f07f-4b4a-bfd8-4aae3046dd16/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[8460,8473] [2023-11-23 21:20:23,109 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:20:23,129 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:20:23,230 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_f53bfa1d-f07f-4b4a-bfd8-4aae3046dd16/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[8460,8473] [2023-11-23 21:20:23,293 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:20:23,317 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:20:23,318 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:20:23 WrapperNode [2023-11-23 21:20:23,318 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:20:23,320 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:20:23,320 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:20:23,320 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:20:23,328 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:20:23" (1/1) ... [2023-11-23 21:20:23,350 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:20:23" (1/1) ... [2023-11-23 21:20:23,417 INFO L138 Inliner]: procedures = 25, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 856 [2023-11-23 21:20:23,418 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:20:23,418 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:20:23,419 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:20:23,419 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:20:23,443 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:20:23" (1/1) ... [2023-11-23 21:20:23,443 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:20:23" (1/1) ... [2023-11-23 21:20:23,450 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:20:23" (1/1) ... [2023-11-23 21:20:23,450 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:20:23" (1/1) ... [2023-11-23 21:20:23,469 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:20:23" (1/1) ... [2023-11-23 21:20:23,479 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:20:23" (1/1) ... [2023-11-23 21:20:23,483 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:20:23" (1/1) ... [2023-11-23 21:20:23,488 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:20:23" (1/1) ... [2023-11-23 21:20:23,496 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:20:23,497 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:20:23,497 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:20:23,498 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:20:23,499 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:20:23" (1/1) ... [2023-11-23 21:20:23,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:20:23,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53bfa1d-f07f-4b4a-bfd8-4aae3046dd16/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:20:23,558 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53bfa1d-f07f-4b4a-bfd8-4aae3046dd16/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:20:23,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53bfa1d-f07f-4b4a-bfd8-4aae3046dd16/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:20:23,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:20:23,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:20:23,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:20:23,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:20:23,857 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:20:23,861 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:20:25,005 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:20:25,273 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:20:25,273 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 21:20:25,276 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:20:25 BoogieIcfgContainer [2023-11-23 21:20:25,276 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:20:25,279 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:20:25,279 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:20:25,283 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:20:25,284 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:20:22" (1/3) ... [2023-11-23 21:20:25,285 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ceac982 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:20:25, skipping insertion in model container [2023-11-23 21:20:25,285 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:20:23" (2/3) ... [2023-11-23 21:20:25,286 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ceac982 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:20:25, skipping insertion in model container [2023-11-23 21:20:25,286 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:20:25" (3/3) ... [2023-11-23 21:20:25,288 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-11-23 21:20:25,311 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:20:25,311 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:20:25,436 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:20:25,471 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;@5cb7ee9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:20:25,472 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:20:25,478 INFO L276 IsEmpty]: Start isEmpty. Operand has 162 states, 160 states have (on average 1.70625) internal successors, (273), 161 states have internal predecessors, (273), 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) [2023-11-23 21:20:25,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-23 21:20:25,490 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:20:25,490 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] [2023-11-23 21:20:25,491 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:20:25,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:20:25,497 INFO L85 PathProgramCache]: Analyzing trace with hash 2076854488, now seen corresponding path program 1 times [2023-11-23 21:20:25,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:20:25,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143204740] [2023-11-23 21:20:25,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:25,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:20:25,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:26,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:20:26,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:20:26,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143204740] [2023-11-23 21:20:26,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143204740] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:20:26,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:20:26,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 21:20:26,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567393290] [2023-11-23 21:20:26,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:20:26,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:20:26,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:20:26,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:20:26,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:20:26,599 INFO L87 Difference]: Start difference. First operand has 162 states, 160 states have (on average 1.70625) internal successors, (273), 161 states have internal predecessors, (273), 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 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 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) [2023-11-23 21:20:27,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:20:27,105 INFO L93 Difference]: Finished difference Result 564 states and 904 transitions. [2023-11-23 21:20:27,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:20:27,107 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 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 67 [2023-11-23 21:20:27,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:20:27,124 INFO L225 Difference]: With dead ends: 564 [2023-11-23 21:20:27,124 INFO L226 Difference]: Without dead ends: 469 [2023-11-23 21:20:27,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:20:27,131 INFO L413 NwaCegarLoop]: 421 mSDtfsCounter, 686 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 1349 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:20:27,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [686 Valid, 1349 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:20:27,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2023-11-23 21:20:27,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 461. [2023-11-23 21:20:27,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 1.4152173913043478) internal successors, (651), 460 states have internal predecessors, (651), 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) [2023-11-23 21:20:27,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 651 transitions. [2023-11-23 21:20:27,212 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 651 transitions. Word has length 67 [2023-11-23 21:20:27,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:20:27,212 INFO L495 AbstractCegarLoop]: Abstraction has 461 states and 651 transitions. [2023-11-23 21:20:27,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 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) [2023-11-23 21:20:27,213 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 651 transitions. [2023-11-23 21:20:27,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-23 21:20:27,220 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:20:27,220 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] [2023-11-23 21:20:27,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:20:27,221 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:20:27,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:20:27,222 INFO L85 PathProgramCache]: Analyzing trace with hash 863926947, now seen corresponding path program 1 times [2023-11-23 21:20:27,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:20:27,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102772632] [2023-11-23 21:20:27,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:27,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:20:27,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:27,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:20:27,414 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:20:27,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102772632] [2023-11-23 21:20:27,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102772632] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:20:27,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:20:27,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:20:27,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568292669] [2023-11-23 21:20:27,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:20:27,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:20:27,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:20:27,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:20:27,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:20:27,418 INFO L87 Difference]: Start difference. First operand 461 states and 651 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2023-11-23 21:20:27,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:20:27,705 INFO L93 Difference]: Finished difference Result 1109 states and 1611 transitions. [2023-11-23 21:20:27,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:20:27,706 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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 68 [2023-11-23 21:20:27,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:20:27,711 INFO L225 Difference]: With dead ends: 1109 [2023-11-23 21:20:27,712 INFO L226 Difference]: Without dead ends: 728 [2023-11-23 21:20:27,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:20:27,724 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 567 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:20:27,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [567 Valid, 234 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:20:27,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2023-11-23 21:20:27,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 726. [2023-11-23 21:20:27,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 1.446896551724138) internal successors, (1049), 725 states have internal predecessors, (1049), 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) [2023-11-23 21:20:27,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 1049 transitions. [2023-11-23 21:20:27,781 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 1049 transitions. Word has length 68 [2023-11-23 21:20:27,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:20:27,781 INFO L495 AbstractCegarLoop]: Abstraction has 726 states and 1049 transitions. [2023-11-23 21:20:27,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2023-11-23 21:20:27,782 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 1049 transitions. [2023-11-23 21:20:27,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-23 21:20:27,786 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:20:27,786 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] [2023-11-23 21:20:27,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:20:27,786 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:20:27,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:20:27,787 INFO L85 PathProgramCache]: Analyzing trace with hash 367032434, now seen corresponding path program 1 times [2023-11-23 21:20:27,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:20:27,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857767096] [2023-11-23 21:20:27,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:27,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:20:27,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:28,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:20:28,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:20:28,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857767096] [2023-11-23 21:20:28,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857767096] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:20:28,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:20:28,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:20:28,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607884613] [2023-11-23 21:20:28,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:20:28,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:20:28,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:20:28,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:20:28,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:20:28,016 INFO L87 Difference]: Start difference. First operand 726 states and 1049 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2023-11-23 21:20:28,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:20:28,316 INFO L93 Difference]: Finished difference Result 1874 states and 2770 transitions. [2023-11-23 21:20:28,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:20:28,317 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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 68 [2023-11-23 21:20:28,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:20:28,328 INFO L225 Difference]: With dead ends: 1874 [2023-11-23 21:20:28,329 INFO L226 Difference]: Without dead ends: 1258 [2023-11-23 21:20:28,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:20:28,342 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 550 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:20:28,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 242 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:20:28,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2023-11-23 21:20:28,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 1256. [2023-11-23 21:20:28,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1256 states, 1255 states have (on average 1.4685258964143426) internal successors, (1843), 1255 states have internal predecessors, (1843), 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) [2023-11-23 21:20:28,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 1843 transitions. [2023-11-23 21:20:28,386 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 1843 transitions. Word has length 68 [2023-11-23 21:20:28,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:20:28,393 INFO L495 AbstractCegarLoop]: Abstraction has 1256 states and 1843 transitions. [2023-11-23 21:20:28,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2023-11-23 21:20:28,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 1843 transitions. [2023-11-23 21:20:28,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-23 21:20:28,398 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:20:28,399 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] [2023-11-23 21:20:28,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:20:28,399 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:20:28,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:20:28,401 INFO L85 PathProgramCache]: Analyzing trace with hash -2022414207, now seen corresponding path program 1 times [2023-11-23 21:20:28,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:20:28,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979143199] [2023-11-23 21:20:28,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:28,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:20:28,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:28,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:20:28,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:20:28,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979143199] [2023-11-23 21:20:28,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979143199] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:20:28,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:20:28,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:20:28,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433221985] [2023-11-23 21:20:28,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:20:28,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:20:28,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:20:28,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:20:28,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:20:28,564 INFO L87 Difference]: Start difference. First operand 1256 states and 1843 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2023-11-23 21:20:28,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:20:28,827 INFO L93 Difference]: Finished difference Result 3430 states and 5115 transitions. [2023-11-23 21:20:28,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:20:28,828 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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 68 [2023-11-23 21:20:28,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:20:28,842 INFO L225 Difference]: With dead ends: 3430 [2023-11-23 21:20:28,843 INFO L226 Difference]: Without dead ends: 2318 [2023-11-23 21:20:28,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:20:28,846 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 568 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:20:28,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [568 Valid, 243 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:20:28,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2318 states. [2023-11-23 21:20:28,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2318 to 2316. [2023-11-23 21:20:28,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2316 states, 2315 states have (on average 1.4807775377969763) internal successors, (3428), 2315 states have internal predecessors, (3428), 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) [2023-11-23 21:20:28,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2316 states to 2316 states and 3428 transitions. [2023-11-23 21:20:28,929 INFO L78 Accepts]: Start accepts. Automaton has 2316 states and 3428 transitions. Word has length 68 [2023-11-23 21:20:28,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:20:28,930 INFO L495 AbstractCegarLoop]: Abstraction has 2316 states and 3428 transitions. [2023-11-23 21:20:28,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2023-11-23 21:20:28,930 INFO L276 IsEmpty]: Start isEmpty. Operand 2316 states and 3428 transitions. [2023-11-23 21:20:28,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-23 21:20:28,931 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:20:28,932 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] [2023-11-23 21:20:28,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:20:28,932 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:20:28,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:20:28,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1255936236, now seen corresponding path program 1 times [2023-11-23 21:20:28,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:20:28,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288542146] [2023-11-23 21:20:28,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:28,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:20:28,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:29,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:20:29,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:20:29,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288542146] [2023-11-23 21:20:29,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288542146] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:20:29,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:20:29,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:20:29,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037791700] [2023-11-23 21:20:29,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:20:29,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:20:29,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:20:29,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:20:29,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:20:29,125 INFO L87 Difference]: Start difference. First operand 2316 states and 3428 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2023-11-23 21:20:29,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:20:29,426 INFO L93 Difference]: Finished difference Result 6697 states and 9989 transitions. [2023-11-23 21:20:29,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:20:29,427 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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 68 [2023-11-23 21:20:29,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:20:29,456 INFO L225 Difference]: With dead ends: 6697 [2023-11-23 21:20:29,456 INFO L226 Difference]: Without dead ends: 4438 [2023-11-23 21:20:29,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:20:29,463 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 560 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:20:29,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [560 Valid, 226 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:20:29,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4438 states. [2023-11-23 21:20:29,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4438 to 4436. [2023-11-23 21:20:29,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4436 states, 4435 states have (on average 1.4793686583990981) internal successors, (6561), 4435 states have internal predecessors, (6561), 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) [2023-11-23 21:20:29,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4436 states to 4436 states and 6561 transitions. [2023-11-23 21:20:29,647 INFO L78 Accepts]: Start accepts. Automaton has 4436 states and 6561 transitions. Word has length 68 [2023-11-23 21:20:29,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:20:29,647 INFO L495 AbstractCegarLoop]: Abstraction has 4436 states and 6561 transitions. [2023-11-23 21:20:29,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2023-11-23 21:20:29,648 INFO L276 IsEmpty]: Start isEmpty. Operand 4436 states and 6561 transitions. [2023-11-23 21:20:29,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-23 21:20:29,649 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:20:29,650 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] [2023-11-23 21:20:29,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:20:29,650 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:20:29,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:20:29,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1268143557, now seen corresponding path program 1 times [2023-11-23 21:20:29,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:20:29,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508596222] [2023-11-23 21:20:29,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:29,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:20:29,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:29,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:20:29,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:20:29,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508596222] [2023-11-23 21:20:29,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508596222] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:20:29,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:20:29,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:20:29,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658675721] [2023-11-23 21:20:29,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:20:29,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:20:29,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:20:29,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:20:29,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:20:29,820 INFO L87 Difference]: Start difference. First operand 4436 states and 6561 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2023-11-23 21:20:30,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:20:30,176 INFO L93 Difference]: Finished difference Result 12353 states and 18326 transitions. [2023-11-23 21:20:30,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:20:30,181 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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 68 [2023-11-23 21:20:30,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:20:30,234 INFO L225 Difference]: With dead ends: 12353 [2023-11-23 21:20:30,234 INFO L226 Difference]: Without dead ends: 7958 [2023-11-23 21:20:30,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:20:30,243 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 565 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:20:30,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [565 Valid, 218 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:20:30,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7958 states. [2023-11-23 21:20:30,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7958 to 7956. [2023-11-23 21:20:30,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7956 states, 7955 states have (on average 1.4681332495285984) internal successors, (11679), 7955 states have internal predecessors, (11679), 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) [2023-11-23 21:20:30,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7956 states to 7956 states and 11679 transitions. [2023-11-23 21:20:30,592 INFO L78 Accepts]: Start accepts. Automaton has 7956 states and 11679 transitions. Word has length 68 [2023-11-23 21:20:30,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:20:30,594 INFO L495 AbstractCegarLoop]: Abstraction has 7956 states and 11679 transitions. [2023-11-23 21:20:30,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2023-11-23 21:20:30,594 INFO L276 IsEmpty]: Start isEmpty. Operand 7956 states and 11679 transitions. [2023-11-23 21:20:30,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-23 21:20:30,595 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:20:30,595 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] [2023-11-23 21:20:30,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:20:30,596 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:20:30,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:20:30,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1017348084, now seen corresponding path program 1 times [2023-11-23 21:20:30,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:20:30,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922381888] [2023-11-23 21:20:30,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:30,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:20:30,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:32,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:20:32,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:20:32,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922381888] [2023-11-23 21:20:32,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922381888] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:20:32,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:20:32,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-11-23 21:20:32,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582456250] [2023-11-23 21:20:32,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:20:32,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-23 21:20:32,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:20:32,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-23 21:20:32,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-11-23 21:20:32,772 INFO L87 Difference]: Start difference. First operand 7956 states and 11679 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 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) [2023-11-23 21:20:33,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:20:33,924 INFO L93 Difference]: Finished difference Result 15362 states and 22455 transitions. [2023-11-23 21:20:33,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-23 21:20:33,925 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 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 69 [2023-11-23 21:20:33,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:20:34,013 INFO L225 Difference]: With dead ends: 15362 [2023-11-23 21:20:34,013 INFO L226 Difference]: Without dead ends: 15360 [2023-11-23 21:20:34,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2023-11-23 21:20:34,018 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 976 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 1128 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:20:34,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [976 Valid, 1128 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:20:34,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15360 states. [2023-11-23 21:20:34,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15360 to 12609. [2023-11-23 21:20:34,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12609 states, 12608 states have (on average 1.460977157360406) internal successors, (18420), 12608 states have internal predecessors, (18420), 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) [2023-11-23 21:20:34,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12609 states to 12609 states and 18420 transitions. [2023-11-23 21:20:34,436 INFO L78 Accepts]: Start accepts. Automaton has 12609 states and 18420 transitions. Word has length 69 [2023-11-23 21:20:34,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:20:34,436 INFO L495 AbstractCegarLoop]: Abstraction has 12609 states and 18420 transitions. [2023-11-23 21:20:34,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 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) [2023-11-23 21:20:34,437 INFO L276 IsEmpty]: Start isEmpty. Operand 12609 states and 18420 transitions. [2023-11-23 21:20:34,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-23 21:20:34,444 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:20:34,445 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] [2023-11-23 21:20:34,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:20:34,445 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:20:34,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:20:34,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1598833644, now seen corresponding path program 1 times [2023-11-23 21:20:34,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:20:34,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549477209] [2023-11-23 21:20:34,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:34,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:20:34,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:36,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:20:36,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:20:36,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549477209] [2023-11-23 21:20:36,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549477209] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:20:36,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:20:36,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-11-23 21:20:36,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919331902] [2023-11-23 21:20:36,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:20:36,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-23 21:20:36,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:20:36,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-23 21:20:36,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-11-23 21:20:36,438 INFO L87 Difference]: Start difference. First operand 12609 states and 18420 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 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) [2023-11-23 21:20:37,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:20:37,529 INFO L93 Difference]: Finished difference Result 17818 states and 25960 transitions. [2023-11-23 21:20:37,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-23 21:20:37,530 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 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 69 [2023-11-23 21:20:37,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:20:37,567 INFO L225 Difference]: With dead ends: 17818 [2023-11-23 21:20:37,567 INFO L226 Difference]: Without dead ends: 15832 [2023-11-23 21:20:37,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2023-11-23 21:20:37,576 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 898 mSDsluCounter, 1379 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 898 SdHoareTripleChecker+Valid, 1720 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:20:37,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [898 Valid, 1720 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 21:20:37,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15832 states. [2023-11-23 21:20:37,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15832 to 14421. [2023-11-23 21:20:37,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14421 states, 14420 states have (on average 1.4582524271844661) internal successors, (21028), 14420 states have internal predecessors, (21028), 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) [2023-11-23 21:20:37,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14421 states to 14421 states and 21028 transitions. [2023-11-23 21:20:37,893 INFO L78 Accepts]: Start accepts. Automaton has 14421 states and 21028 transitions. Word has length 69 [2023-11-23 21:20:37,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:20:37,894 INFO L495 AbstractCegarLoop]: Abstraction has 14421 states and 21028 transitions. [2023-11-23 21:20:37,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 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) [2023-11-23 21:20:37,894 INFO L276 IsEmpty]: Start isEmpty. Operand 14421 states and 21028 transitions. [2023-11-23 21:20:37,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-23 21:20:37,896 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:20:37,896 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] [2023-11-23 21:20:37,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 21:20:37,896 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:20:37,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:20:37,897 INFO L85 PathProgramCache]: Analyzing trace with hash 2131709900, now seen corresponding path program 1 times [2023-11-23 21:20:37,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:20:37,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617246634] [2023-11-23 21:20:37,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:37,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:20:37,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:40,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:20:40,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:20:40,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617246634] [2023-11-23 21:20:40,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617246634] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:20:40,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:20:40,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2023-11-23 21:20:40,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711145415] [2023-11-23 21:20:40,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:20:40,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-23 21:20:40,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:20:40,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-23 21:20:40,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2023-11-23 21:20:40,959 INFO L87 Difference]: Start difference. First operand 14421 states and 21028 transitions. Second operand has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 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) [2023-11-23 21:20:45,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:20:45,028 INFO L93 Difference]: Finished difference Result 17568 states and 25540 transitions. [2023-11-23 21:20:45,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-23 21:20:45,029 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 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 69 [2023-11-23 21:20:45,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:20:45,066 INFO L225 Difference]: With dead ends: 17568 [2023-11-23 21:20:45,067 INFO L226 Difference]: Without dead ends: 17566 [2023-11-23 21:20:45,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=312, Invalid=1328, Unknown=0, NotChecked=0, Total=1640 [2023-11-23 21:20:45,074 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 1205 mSDsluCounter, 2326 mSDsCounter, 0 mSdLazyCounter, 3271 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1205 SdHoareTripleChecker+Valid, 2520 SdHoareTripleChecker+Invalid, 3277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 3271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-23 21:20:45,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1205 Valid, 2520 Invalid, 3277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 3271 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-11-23 21:20:45,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17566 states. [2023-11-23 21:20:45,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17566 to 14439. [2023-11-23 21:20:45,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14439 states, 14438 states have (on average 1.4578196426097798) internal successors, (21048), 14438 states have internal predecessors, (21048), 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) [2023-11-23 21:20:45,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14439 states to 14439 states and 21048 transitions. [2023-11-23 21:20:45,380 INFO L78 Accepts]: Start accepts. Automaton has 14439 states and 21048 transitions. Word has length 69 [2023-11-23 21:20:45,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:20:45,381 INFO L495 AbstractCegarLoop]: Abstraction has 14439 states and 21048 transitions. [2023-11-23 21:20:45,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 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) [2023-11-23 21:20:45,381 INFO L276 IsEmpty]: Start isEmpty. Operand 14439 states and 21048 transitions. [2023-11-23 21:20:45,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-23 21:20:45,385 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:20:45,385 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] [2023-11-23 21:20:45,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 21:20:45,386 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:20:45,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:20:45,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1936720940, now seen corresponding path program 1 times [2023-11-23 21:20:45,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:20:45,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397467863] [2023-11-23 21:20:45,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:45,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:20:45,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:46,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:20:46,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:20:46,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397467863] [2023-11-23 21:20:46,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397467863] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:20:46,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:20:46,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-11-23 21:20:46,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507440377] [2023-11-23 21:20:46,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:20:46,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-23 21:20:46,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:20:46,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-23 21:20:46,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-11-23 21:20:46,945 INFO L87 Difference]: Start difference. First operand 14439 states and 21048 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 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) [2023-11-23 21:20:48,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:20:48,037 INFO L93 Difference]: Finished difference Result 24441 states and 35661 transitions. [2023-11-23 21:20:48,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-23 21:20:48,038 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 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 69 [2023-11-23 21:20:48,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:20:48,087 INFO L225 Difference]: With dead ends: 24441 [2023-11-23 21:20:48,087 INFO L226 Difference]: Without dead ends: 24439 [2023-11-23 21:20:48,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2023-11-23 21:20:48,096 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 955 mSDsluCounter, 1079 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 955 SdHoareTripleChecker+Valid, 1432 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:20:48,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [955 Valid, 1432 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 21:20:48,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24439 states. [2023-11-23 21:20:48,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24439 to 16097. [2023-11-23 21:20:48,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16097 states, 16096 states have (on average 1.458312624254473) internal successors, (23473), 16096 states have internal predecessors, (23473), 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) [2023-11-23 21:20:48,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16097 states to 16097 states and 23473 transitions. [2023-11-23 21:20:48,505 INFO L78 Accepts]: Start accepts. Automaton has 16097 states and 23473 transitions. Word has length 69 [2023-11-23 21:20:48,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:20:48,505 INFO L495 AbstractCegarLoop]: Abstraction has 16097 states and 23473 transitions. [2023-11-23 21:20:48,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 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) [2023-11-23 21:20:48,506 INFO L276 IsEmpty]: Start isEmpty. Operand 16097 states and 23473 transitions. [2023-11-23 21:20:48,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-23 21:20:48,508 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:20:48,508 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] [2023-11-23 21:20:48,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-23 21:20:48,508 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:20:48,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:20:48,509 INFO L85 PathProgramCache]: Analyzing trace with hash -172568500, now seen corresponding path program 1 times [2023-11-23 21:20:48,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:20:48,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805630018] [2023-11-23 21:20:48,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:48,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:20:48,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:50,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:20:50,006 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:20:50,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805630018] [2023-11-23 21:20:50,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805630018] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:20:50,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:20:50,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-11-23 21:20:50,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147338575] [2023-11-23 21:20:50,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:20:50,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-23 21:20:50,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:20:50,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-23 21:20:50,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-11-23 21:20:50,008 INFO L87 Difference]: Start difference. First operand 16097 states and 23473 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 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) [2023-11-23 21:20:51,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:20:51,663 INFO L93 Difference]: Finished difference Result 28574 states and 41770 transitions. [2023-11-23 21:20:51,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-23 21:20:51,664 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 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 69 [2023-11-23 21:20:51,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:20:51,704 INFO L225 Difference]: With dead ends: 28574 [2023-11-23 21:20:51,704 INFO L226 Difference]: Without dead ends: 28572 [2023-11-23 21:20:51,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2023-11-23 21:20:51,713 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 751 mSDsluCounter, 2870 mSDsCounter, 0 mSdLazyCounter, 1567 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 751 SdHoareTripleChecker+Valid, 3223 SdHoareTripleChecker+Invalid, 1573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:20:51,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [751 Valid, 3223 Invalid, 1573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1567 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-23 21:20:51,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28572 states. [2023-11-23 21:20:52,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28572 to 17624. [2023-11-23 21:20:52,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17624 states, 17623 states have (on average 1.4593996481870284) internal successors, (25719), 17623 states have internal predecessors, (25719), 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) [2023-11-23 21:20:52,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17624 states to 17624 states and 25719 transitions. [2023-11-23 21:20:52,103 INFO L78 Accepts]: Start accepts. Automaton has 17624 states and 25719 transitions. Word has length 69 [2023-11-23 21:20:52,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:20:52,103 INFO L495 AbstractCegarLoop]: Abstraction has 17624 states and 25719 transitions. [2023-11-23 21:20:52,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 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) [2023-11-23 21:20:52,104 INFO L276 IsEmpty]: Start isEmpty. Operand 17624 states and 25719 transitions. [2023-11-23 21:20:52,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-23 21:20:52,105 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:20:52,105 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:20:52,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-23 21:20:52,106 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:20:52,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:20:52,107 INFO L85 PathProgramCache]: Analyzing trace with hash 187530784, now seen corresponding path program 1 times [2023-11-23 21:20:52,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:20:52,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659692990] [2023-11-23 21:20:52,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:52,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:20:52,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:53,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:20:53,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:20:53,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659692990] [2023-11-23 21:20:53,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659692990] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:20:53,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:20:53,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-11-23 21:20:53,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807909804] [2023-11-23 21:20:53,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:20:53,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-23 21:20:53,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:20:53,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-23 21:20:53,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-11-23 21:20:53,654 INFO L87 Difference]: Start difference. First operand 17624 states and 25719 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:20:55,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:20:55,146 INFO L93 Difference]: Finished difference Result 22854 states and 33284 transitions. [2023-11-23 21:20:55,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-23 21:20:55,146 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2023-11-23 21:20:55,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:20:55,166 INFO L225 Difference]: With dead ends: 22854 [2023-11-23 21:20:55,166 INFO L226 Difference]: Without dead ends: 20868 [2023-11-23 21:20:55,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2023-11-23 21:20:55,174 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 858 mSDsluCounter, 2647 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 2992 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:20:55,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [858 Valid, 2992 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1042 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-23 21:20:55,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20868 states. [2023-11-23 21:20:55,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20868 to 17630. [2023-11-23 21:20:55,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17630 states, 17629 states have (on average 1.4593000170174144) internal successors, (25726), 17629 states have internal predecessors, (25726), 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) [2023-11-23 21:20:55,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17630 states to 17630 states and 25726 transitions. [2023-11-23 21:20:55,592 INFO L78 Accepts]: Start accepts. Automaton has 17630 states and 25726 transitions. Word has length 71 [2023-11-23 21:20:55,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:20:55,593 INFO L495 AbstractCegarLoop]: Abstraction has 17630 states and 25726 transitions. [2023-11-23 21:20:55,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:20:55,593 INFO L276 IsEmpty]: Start isEmpty. Operand 17630 states and 25726 transitions. [2023-11-23 21:20:55,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-23 21:20:55,595 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:20:55,595 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:20:55,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-23 21:20:55,596 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:20:55,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:20:55,596 INFO L85 PathProgramCache]: Analyzing trace with hash 720407040, now seen corresponding path program 1 times [2023-11-23 21:20:55,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:20:55,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170084391] [2023-11-23 21:20:55,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:55,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:20:55,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:57,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:20:57,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:20:57,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170084391] [2023-11-23 21:20:57,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170084391] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:20:57,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:20:57,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-11-23 21:20:57,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682888126] [2023-11-23 21:20:57,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:20:57,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-23 21:20:57,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:20:57,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-23 21:20:57,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2023-11-23 21:20:57,408 INFO L87 Difference]: Start difference. First operand 17630 states and 25726 transitions. Second operand has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:21:00,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:21:00,163 INFO L93 Difference]: Finished difference Result 22744 states and 33054 transitions. [2023-11-23 21:21:00,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-23 21:21:00,174 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2023-11-23 21:21:00,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:21:00,202 INFO L225 Difference]: With dead ends: 22744 [2023-11-23 21:21:00,202 INFO L226 Difference]: Without dead ends: 22742 [2023-11-23 21:21:00,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2023-11-23 21:21:00,210 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 1144 mSDsluCounter, 2219 mSDsCounter, 0 mSdLazyCounter, 2878 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1144 SdHoareTripleChecker+Valid, 2417 SdHoareTripleChecker+Invalid, 2885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 2878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:21:00,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1144 Valid, 2417 Invalid, 2885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 2878 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-23 21:21:00,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22742 states. [2023-11-23 21:21:00,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22742 to 17627. [2023-11-23 21:21:00,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17627 states, 17626 states have (on average 1.4593214569386135) internal successors, (25722), 17626 states have internal predecessors, (25722), 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) [2023-11-23 21:21:00,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17627 states to 17627 states and 25722 transitions. [2023-11-23 21:21:00,493 INFO L78 Accepts]: Start accepts. Automaton has 17627 states and 25722 transitions. Word has length 71 [2023-11-23 21:21:00,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:21:00,493 INFO L495 AbstractCegarLoop]: Abstraction has 17627 states and 25722 transitions. [2023-11-23 21:21:00,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:21:00,494 INFO L276 IsEmpty]: Start isEmpty. Operand 17627 states and 25722 transitions. [2023-11-23 21:21:00,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-23 21:21:00,495 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:21:00,496 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:21:00,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-23 21:21:00,496 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:21:00,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:21:00,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1979787808, now seen corresponding path program 1 times [2023-11-23 21:21:00,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:21:00,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705372586] [2023-11-23 21:21:00,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:21:00,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:21:00,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:21:02,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:21:02,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:21:02,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705372586] [2023-11-23 21:21:02,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705372586] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:21:02,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:21:02,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-11-23 21:21:02,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127717178] [2023-11-23 21:21:02,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:21:02,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-23 21:21:02,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:21:02,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-23 21:21:02,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2023-11-23 21:21:02,120 INFO L87 Difference]: Start difference. First operand 17627 states and 25722 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:21:03,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:21:03,930 INFO L93 Difference]: Finished difference Result 22772 states and 33085 transitions. [2023-11-23 21:21:03,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-23 21:21:03,931 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2023-11-23 21:21:03,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:21:03,955 INFO L225 Difference]: With dead ends: 22772 [2023-11-23 21:21:03,955 INFO L226 Difference]: Without dead ends: 22770 [2023-11-23 21:21:03,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2023-11-23 21:21:03,961 INFO L413 NwaCegarLoop]: 413 mSDtfsCounter, 832 mSDsluCounter, 2831 mSDsCounter, 0 mSdLazyCounter, 1451 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 3244 SdHoareTripleChecker+Invalid, 1459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:21:03,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [832 Valid, 3244 Invalid, 1459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1451 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-23 21:21:03,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22770 states. [2023-11-23 21:21:04,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22770 to 18631. [2023-11-23 21:21:04,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18631 states, 18630 states have (on average 1.4570585077831455) internal successors, (27145), 18630 states have internal predecessors, (27145), 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) [2023-11-23 21:21:04,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18631 states to 18631 states and 27145 transitions. [2023-11-23 21:21:04,233 INFO L78 Accepts]: Start accepts. Automaton has 18631 states and 27145 transitions. Word has length 71 [2023-11-23 21:21:04,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:21:04,233 INFO L495 AbstractCegarLoop]: Abstraction has 18631 states and 27145 transitions. [2023-11-23 21:21:04,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:21:04,234 INFO L276 IsEmpty]: Start isEmpty. Operand 18631 states and 27145 transitions. [2023-11-23 21:21:04,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-23 21:21:04,235 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:21:04,236 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:21:04,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-23 21:21:04,236 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:21:04,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:21:04,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1753265760, now seen corresponding path program 1 times [2023-11-23 21:21:04,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:21:04,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444153045] [2023-11-23 21:21:04,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:21:04,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:21:04,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat