./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 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_894ddbbf-d024-414c-90b2-5138a433c765/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894ddbbf-d024-414c-90b2-5138a433c765/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894ddbbf-d024-414c-90b2-5138a433c765/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894ddbbf-d024-414c-90b2-5138a433c765/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894ddbbf-d024-414c-90b2-5138a433c765/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894ddbbf-d024-414c-90b2-5138a433c765/bin/uautomizer-verify-bycVGegfSx --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e1221f43edcd55fb28cc2c33b3cd78828237d81c097e561fccaa486cdd56e141 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:08:44,815 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:08:44,912 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894ddbbf-d024-414c-90b2-5138a433c765/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-21 22:08:44,918 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:08:44,918 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:08:44,974 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:08:44,975 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:08:44,976 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:08:44,977 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 22:08:44,984 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 22:08:44,985 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:08:44,985 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:08:44,986 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:08:44,988 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:08:44,988 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:08:44,989 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:08:44,989 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 22:08:44,990 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:08:44,990 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:08:44,990 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:08:44,991 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:08:44,991 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 22:08:44,992 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:08:44,992 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 22:08:44,992 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:08:44,993 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 22:08:44,993 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:08:44,994 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:08:44,994 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:08:44,995 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:08:44,996 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:08:44,996 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:08:44,997 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:08:44,997 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:08:44,997 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 22:08:44,997 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:08:44,997 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:08:44,998 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:08:44,998 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:08:44,998 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 22:08:44,998 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:08:45,000 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:08:45,001 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_894ddbbf-d024-414c-90b2-5138a433c765/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894ddbbf-d024-414c-90b2-5138a433c765/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1221f43edcd55fb28cc2c33b3cd78828237d81c097e561fccaa486cdd56e141 [2023-11-21 22:08:45,260 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:08:45,289 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:08:45,292 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:08:45,293 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:08:45,294 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:08:45,295 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894ddbbf-d024-414c-90b2-5138a433c765/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-11-21 22:08:48,365 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:08:48,640 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:08:48,641 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894ddbbf-d024-414c-90b2-5138a433c765/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-11-21 22:08:48,668 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894ddbbf-d024-414c-90b2-5138a433c765/bin/uautomizer-verify-bycVGegfSx/data/b18d9fece/7282f7d3e6dc46cc98d2ca61144f2857/FLAGe1481ec9a [2023-11-21 22:08:48,688 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894ddbbf-d024-414c-90b2-5138a433c765/bin/uautomizer-verify-bycVGegfSx/data/b18d9fece/7282f7d3e6dc46cc98d2ca61144f2857 [2023-11-21 22:08:48,691 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:08:48,693 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:08:48,694 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:08:48,695 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:08:48,701 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:08:48,702 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:08:48" (1/1) ... [2023-11-21 22:08:48,703 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1065f113 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:08:48, skipping insertion in model container [2023-11-21 22:08:48,703 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:08:48" (1/1) ... [2023-11-21 22:08:48,757 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:08:49,006 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_894ddbbf-d024-414c-90b2-5138a433c765/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[7107,7120] [2023-11-21 22:08:49,101 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:08:49,123 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:08:49,198 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_894ddbbf-d024-414c-90b2-5138a433c765/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[7107,7120] [2023-11-21 22:08:49,233 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:08:49,255 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:08:49,255 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:08:49 WrapperNode [2023-11-21 22:08:49,255 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:08:49,257 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:08:49,257 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:08:49,257 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:08:49,267 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:08:49" (1/1) ... [2023-11-21 22:08:49,281 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:08:49" (1/1) ... [2023-11-21 22:08:49,347 INFO L138 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 687 [2023-11-21 22:08:49,348 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:08:49,349 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:08:49,349 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:08:49,349 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:08:49,363 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:08:49" (1/1) ... [2023-11-21 22:08:49,364 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:08:49" (1/1) ... [2023-11-21 22:08:49,369 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:08:49" (1/1) ... [2023-11-21 22:08:49,408 INFO L187 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-21 22:08:49,409 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:08:49" (1/1) ... [2023-11-21 22:08:49,409 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:08:49" (1/1) ... [2023-11-21 22:08:49,436 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:08:49" (1/1) ... [2023-11-21 22:08:49,443 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:08:49" (1/1) ... [2023-11-21 22:08:49,459 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:08:49" (1/1) ... [2023-11-21 22:08:49,463 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:08:49" (1/1) ... [2023-11-21 22:08:49,469 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:08:49,485 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:08:49,485 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:08:49,485 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:08:49,486 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:08:49" (1/1) ... [2023-11-21 22:08:49,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:08:49,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894ddbbf-d024-414c-90b2-5138a433c765/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:08:49,526 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894ddbbf-d024-414c-90b2-5138a433c765/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:08:49,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894ddbbf-d024-414c-90b2-5138a433c765/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:08:49,574 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:08:49,574 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-21 22:08:49,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:08:49,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:08:49,759 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:08:49,769 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:08:50,570 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:08:50,907 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:08:50,907 INFO L308 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-21 22:08:50,909 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:08:50 BoogieIcfgContainer [2023-11-21 22:08:50,909 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:08:50,913 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:08:50,913 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:08:50,916 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:08:50,916 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:08:48" (1/3) ... [2023-11-21 22:08:50,917 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fd6c29c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:08:50, skipping insertion in model container [2023-11-21 22:08:50,917 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:08:49" (2/3) ... [2023-11-21 22:08:50,919 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fd6c29c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:08:50, skipping insertion in model container [2023-11-21 22:08:50,919 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:08:50" (3/3) ... [2023-11-21 22:08:50,921 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-11-21 22:08:50,946 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:08:50,948 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 22:08:51,034 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:08:51,040 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=PETRI_NET, 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;@7e8f1ef3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:08:51,041 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 22:08:51,045 INFO L276 IsEmpty]: Start isEmpty. Operand has 122 states, 120 states have (on average 1.7083333333333333) internal successors, (205), 121 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:08:51,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-21 22:08:51,053 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:08:51,054 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] [2023-11-21 22:08:51,054 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:08:51,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:08:51,059 INFO L85 PathProgramCache]: Analyzing trace with hash -841009558, now seen corresponding path program 1 times [2023-11-21 22:08:51,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:08:51,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352155127] [2023-11-21 22:08:51,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:08:51,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:08:51,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:08:51,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:08:51,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:08:51,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352155127] [2023-11-21 22:08:51,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352155127] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:08:51,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:08:51,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 22:08:51,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794257292] [2023-11-21 22:08:51,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:08:51,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:08:51,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:08:51,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:08:51,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:08:51,912 INFO L87 Difference]: Start difference. First operand has 122 states, 120 states have (on average 1.7083333333333333) internal successors, (205), 121 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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) [2023-11-21 22:08:52,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:08:52,282 INFO L93 Difference]: Finished difference Result 371 states and 594 transitions. [2023-11-21 22:08:52,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 22:08:52,285 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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 52 [2023-11-21 22:08:52,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:08:52,311 INFO L225 Difference]: With dead ends: 371 [2023-11-21 22:08:52,312 INFO L226 Difference]: Without dead ends: 296 [2023-11-21 22:08:52,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:08:52,321 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 459 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:08:52,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 717 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:08:52,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2023-11-21 22:08:52,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 290. [2023-11-21 22:08:52,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.3840830449826989) internal successors, (400), 289 states have internal predecessors, (400), 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) [2023-11-21 22:08:52,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 400 transitions. [2023-11-21 22:08:52,398 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 400 transitions. Word has length 52 [2023-11-21 22:08:52,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:08:52,399 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 400 transitions. [2023-11-21 22:08:52,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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) [2023-11-21 22:08:52,400 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 400 transitions. [2023-11-21 22:08:52,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-21 22:08:52,403 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:08:52,403 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] [2023-11-21 22:08:52,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 22:08:52,404 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:08:52,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:08:52,405 INFO L85 PathProgramCache]: Analyzing trace with hash -967017349, now seen corresponding path program 1 times [2023-11-21 22:08:52,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:08:52,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612433013] [2023-11-21 22:08:52,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:08:52,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:08:52,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:08:52,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:08:52,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:08:52,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612433013] [2023-11-21 22:08:52,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612433013] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:08:52,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:08:52,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:08:52,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448869456] [2023-11-21 22:08:52,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:08:52,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:08:52,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:08:52,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:08:52,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:08:52,661 INFO L87 Difference]: Start difference. First operand 290 states and 400 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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) [2023-11-21 22:08:52,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:08:52,902 INFO L93 Difference]: Finished difference Result 690 states and 982 transitions. [2023-11-21 22:08:52,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:08:52,903 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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 53 [2023-11-21 22:08:52,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:08:52,906 INFO L225 Difference]: With dead ends: 690 [2023-11-21 22:08:52,907 INFO L226 Difference]: Without dead ends: 445 [2023-11-21 22:08:52,912 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 [2023-11-21 22:08:52,914 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 419 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:08:52,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 167 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:08:52,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2023-11-21 22:08:52,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 443. [2023-11-21 22:08:52,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.416289592760181) internal successors, (626), 442 states have internal predecessors, (626), 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) [2023-11-21 22:08:52,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 626 transitions. [2023-11-21 22:08:52,969 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 626 transitions. Word has length 53 [2023-11-21 22:08:52,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:08:52,970 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 626 transitions. [2023-11-21 22:08:52,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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) [2023-11-21 22:08:52,970 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 626 transitions. [2023-11-21 22:08:52,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-21 22:08:52,980 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:08:52,981 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] [2023-11-21 22:08:52,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 22:08:52,981 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:08:52,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:08:52,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1004572121, now seen corresponding path program 1 times [2023-11-21 22:08:52,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:08:52,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761607532] [2023-11-21 22:08:52,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:08:52,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:08:53,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:08:53,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:08:53,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:08:53,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761607532] [2023-11-21 22:08:53,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761607532] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:08:53,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:08:53,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:08:53,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485085665] [2023-11-21 22:08:53,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:08:53,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:08:53,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:08:53,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:08:53,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:08:53,209 INFO L87 Difference]: Start difference. First operand 443 states and 626 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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) [2023-11-21 22:08:53,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:08:53,434 INFO L93 Difference]: Finished difference Result 1099 states and 1596 transitions. [2023-11-21 22:08:53,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:08:53,435 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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 53 [2023-11-21 22:08:53,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:08:53,439 INFO L225 Difference]: With dead ends: 1099 [2023-11-21 22:08:53,440 INFO L226 Difference]: Without dead ends: 751 [2023-11-21 22:08:53,444 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 [2023-11-21 22:08:53,451 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 391 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:08:53,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 183 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:08:53,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2023-11-21 22:08:53,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 749. [2023-11-21 22:08:53,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 1.4411764705882353) internal successors, (1078), 748 states have internal predecessors, (1078), 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) [2023-11-21 22:08:53,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 1078 transitions. [2023-11-21 22:08:53,488 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 1078 transitions. Word has length 53 [2023-11-21 22:08:53,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:08:53,491 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 1078 transitions. [2023-11-21 22:08:53,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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) [2023-11-21 22:08:53,493 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 1078 transitions. [2023-11-21 22:08:53,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-21 22:08:53,499 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:08:53,500 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] [2023-11-21 22:08:53,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 22:08:53,500 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:08:53,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:08:53,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1388921866, now seen corresponding path program 1 times [2023-11-21 22:08:53,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:08:53,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495978301] [2023-11-21 22:08:53,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:08:53,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:08:53,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:08:53,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:08:53,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:08:53,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495978301] [2023-11-21 22:08:53,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495978301] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:08:53,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:08:53,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:08:53,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970252407] [2023-11-21 22:08:53,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:08:53,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:08:53,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:08:53,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:08:53,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:08:53,746 INFO L87 Difference]: Start difference. First operand 749 states and 1078 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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) [2023-11-21 22:08:53,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:08:53,957 INFO L93 Difference]: Finished difference Result 2044 states and 2993 transitions. [2023-11-21 22:08:53,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:08:53,958 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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 53 [2023-11-21 22:08:53,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:08:53,966 INFO L225 Difference]: With dead ends: 2044 [2023-11-21 22:08:53,967 INFO L226 Difference]: Without dead ends: 1363 [2023-11-21 22:08:53,968 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 [2023-11-21 22:08:53,969 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 396 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:08:53,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 175 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:08:53,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1363 states. [2023-11-21 22:08:54,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1363 to 1361. [2023-11-21 22:08:54,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 1360 states have (on average 1.451470588235294) internal successors, (1974), 1360 states have internal predecessors, (1974), 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) [2023-11-21 22:08:54,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 1974 transitions. [2023-11-21 22:08:54,015 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 1974 transitions. Word has length 53 [2023-11-21 22:08:54,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:08:54,016 INFO L495 AbstractCegarLoop]: Abstraction has 1361 states and 1974 transitions. [2023-11-21 22:08:54,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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) [2023-11-21 22:08:54,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 1974 transitions. [2023-11-21 22:08:54,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-21 22:08:54,017 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:08:54,018 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] [2023-11-21 22:08:54,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 22:08:54,018 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:08:54,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:08:54,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1063344990, now seen corresponding path program 1 times [2023-11-21 22:08:54,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:08:54,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488904741] [2023-11-21 22:08:54,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:08:54,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:08:54,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:08:55,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:08:55,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:08:55,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488904741] [2023-11-21 22:08:55,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488904741] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:08:55,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:08:55,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-11-21 22:08:55,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312302725] [2023-11-21 22:08:55,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:08:55,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-21 22:08:55,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:08:55,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-21 22:08:55,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-11-21 22:08:55,404 INFO L87 Difference]: Start difference. First operand 1361 states and 1974 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 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) [2023-11-21 22:08:56,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:08:56,158 INFO L93 Difference]: Finished difference Result 2831 states and 4107 transitions. [2023-11-21 22:08:56,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-21 22:08:56,159 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 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 54 [2023-11-21 22:08:56,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:08:56,176 INFO L225 Difference]: With dead ends: 2831 [2023-11-21 22:08:56,176 INFO L226 Difference]: Without dead ends: 2829 [2023-11-21 22:08:56,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2023-11-21 22:08:56,178 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 535 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 1057 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 22:08:56,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [535 Valid, 1057 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 22:08:56,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2829 states. [2023-11-21 22:08:56,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2829 to 2177. [2023-11-21 22:08:56,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2177 states, 2176 states have (on average 1.4494485294117647) internal successors, (3154), 2176 states have internal predecessors, (3154), 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) [2023-11-21 22:08:56,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2177 states to 2177 states and 3154 transitions. [2023-11-21 22:08:56,249 INFO L78 Accepts]: Start accepts. Automaton has 2177 states and 3154 transitions. Word has length 54 [2023-11-21 22:08:56,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:08:56,250 INFO L495 AbstractCegarLoop]: Abstraction has 2177 states and 3154 transitions. [2023-11-21 22:08:56,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 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) [2023-11-21 22:08:56,250 INFO L276 IsEmpty]: Start isEmpty. Operand 2177 states and 3154 transitions. [2023-11-21 22:08:56,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-21 22:08:56,251 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:08:56,251 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] [2023-11-21 22:08:56,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 22:08:56,252 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:08:56,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:08:56,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1326291742, now seen corresponding path program 1 times [2023-11-21 22:08:56,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:08:56,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75456246] [2023-11-21 22:08:56,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:08:56,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:08:56,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:08:57,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:08:57,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:08:57,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75456246] [2023-11-21 22:08:57,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75456246] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:08:57,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:08:57,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-11-21 22:08:57,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040115551] [2023-11-21 22:08:57,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:08:57,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-21 22:08:57,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:08:57,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-21 22:08:57,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-11-21 22:08:57,543 INFO L87 Difference]: Start difference. First operand 2177 states and 3154 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 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) [2023-11-21 22:08:58,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:08:58,297 INFO L93 Difference]: Finished difference Result 2517 states and 3635 transitions. [2023-11-21 22:08:58,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-21 22:08:58,301 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 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 54 [2023-11-21 22:08:58,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:08:58,319 INFO L225 Difference]: With dead ends: 2517 [2023-11-21 22:08:58,319 INFO L226 Difference]: Without dead ends: 2515 [2023-11-21 22:08:58,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2023-11-21 22:08:58,321 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 498 mSDsluCounter, 1431 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 1661 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 22:08:58,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 1661 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 22:08:58,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2515 states. [2023-11-21 22:08:58,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2515 to 2196. [2023-11-21 22:08:58,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2196 states, 2195 states have (on average 1.4464692482915718) internal successors, (3175), 2195 states have internal predecessors, (3175), 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) [2023-11-21 22:08:58,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 3175 transitions. [2023-11-21 22:08:58,416 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 3175 transitions. Word has length 54 [2023-11-21 22:08:58,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:08:58,417 INFO L495 AbstractCegarLoop]: Abstraction has 2196 states and 3175 transitions. [2023-11-21 22:08:58,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 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) [2023-11-21 22:08:58,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 3175 transitions. [2023-11-21 22:08:58,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-21 22:08:58,418 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:08:58,418 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] [2023-11-21 22:08:58,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 22:08:58,419 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:08:58,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:08:58,420 INFO L85 PathProgramCache]: Analyzing trace with hash 2099566398, now seen corresponding path program 1 times [2023-11-21 22:08:58,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:08:58,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015404998] [2023-11-21 22:08:58,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:08:58,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:08:58,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:08:59,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:08:59,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:08:59,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015404998] [2023-11-21 22:08:59,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015404998] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:08:59,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:08:59,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-11-21 22:08:59,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875844552] [2023-11-21 22:08:59,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:08:59,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-21 22:08:59,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:08:59,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-21 22:08:59,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-11-21 22:08:59,677 INFO L87 Difference]: Start difference. First operand 2196 states and 3175 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 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) [2023-11-21 22:09:00,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:09:00,619 INFO L93 Difference]: Finished difference Result 3219 states and 4647 transitions. [2023-11-21 22:09:00,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-21 22:09:00,620 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 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 54 [2023-11-21 22:09:00,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:09:00,635 INFO L225 Difference]: With dead ends: 3219 [2023-11-21 22:09:00,636 INFO L226 Difference]: Without dead ends: 2865 [2023-11-21 22:09:00,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2023-11-21 22:09:00,638 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 484 mSDsluCounter, 1811 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 2055 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-21 22:09:00,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [484 Valid, 2055 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-21 22:09:00,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2865 states. [2023-11-21 22:09:00,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2865 to 2516. [2023-11-21 22:09:00,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2516 states, 2515 states have (on average 1.443737574552684) internal successors, (3631), 2515 states have internal predecessors, (3631), 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) [2023-11-21 22:09:00,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2516 states to 2516 states and 3631 transitions. [2023-11-21 22:09:00,737 INFO L78 Accepts]: Start accepts. Automaton has 2516 states and 3631 transitions. Word has length 54 [2023-11-21 22:09:00,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:09:00,738 INFO L495 AbstractCegarLoop]: Abstraction has 2516 states and 3631 transitions. [2023-11-21 22:09:00,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 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) [2023-11-21 22:09:00,739 INFO L276 IsEmpty]: Start isEmpty. Operand 2516 states and 3631 transitions. [2023-11-21 22:09:00,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-21 22:09:00,740 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:09:00,741 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] [2023-11-21 22:09:00,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-21 22:09:00,741 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:09:00,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:09:00,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1215036740, now seen corresponding path program 1 times [2023-11-21 22:09:00,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:09:00,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265409245] [2023-11-21 22:09:00,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:09:00,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:09:00,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:09:00,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:09:00,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:09:00,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265409245] [2023-11-21 22:09:00,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265409245] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:09:00,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:09:00,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:09:00,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640928567] [2023-11-21 22:09:00,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:09:00,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:09:00,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:09:00,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:09:00,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:09:00,867 INFO L87 Difference]: Start difference. First operand 2516 states and 3631 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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) [2023-11-21 22:09:01,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:09:01,007 INFO L93 Difference]: Finished difference Result 3830 states and 5552 transitions. [2023-11-21 22:09:01,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:09:01,007 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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 54 [2023-11-21 22:09:01,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:09:01,022 INFO L225 Difference]: With dead ends: 3830 [2023-11-21 22:09:01,022 INFO L226 Difference]: Without dead ends: 2516 [2023-11-21 22:09:01,024 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 [2023-11-21 22:09:01,025 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 341 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:09:01,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 130 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:09:01,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2516 states. [2023-11-21 22:09:01,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2516 to 2516. [2023-11-21 22:09:01,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2516 states, 2515 states have (on average 1.4433399602385686) internal successors, (3630), 2515 states have internal predecessors, (3630), 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) [2023-11-21 22:09:01,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2516 states to 2516 states and 3630 transitions. [2023-11-21 22:09:01,091 INFO L78 Accepts]: Start accepts. Automaton has 2516 states and 3630 transitions. Word has length 54 [2023-11-21 22:09:01,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:09:01,091 INFO L495 AbstractCegarLoop]: Abstraction has 2516 states and 3630 transitions. [2023-11-21 22:09:01,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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) [2023-11-21 22:09:01,092 INFO L276 IsEmpty]: Start isEmpty. Operand 2516 states and 3630 transitions. [2023-11-21 22:09:01,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-21 22:09:01,093 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:09:01,093 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] [2023-11-21 22:09:01,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-21 22:09:01,093 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:09:01,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:09:01,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1254601234, now seen corresponding path program 1 times [2023-11-21 22:09:01,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:09:01,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146825413] [2023-11-21 22:09:01,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:09:01,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:09:01,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:09:02,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:09:02,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:09:02,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146825413] [2023-11-21 22:09:02,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146825413] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:09:02,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:09:02,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-11-21 22:09:02,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558353469] [2023-11-21 22:09:02,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:09:02,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-21 22:09:02,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:09:02,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-21 22:09:02,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-11-21 22:09:02,241 INFO L87 Difference]: Start difference. First operand 2516 states and 3630 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 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) [2023-11-21 22:09:03,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:09:03,242 INFO L93 Difference]: Finished difference Result 4743 states and 6892 transitions. [2023-11-21 22:09:03,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-21 22:09:03,243 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 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 55 [2023-11-21 22:09:03,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:09:03,269 INFO L225 Difference]: With dead ends: 4743 [2023-11-21 22:09:03,270 INFO L226 Difference]: Without dead ends: 4741 [2023-11-21 22:09:03,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2023-11-21 22:09:03,274 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 435 mSDsluCounter, 1338 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 1590 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-21 22:09:03,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 1590 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-21 22:09:03,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4741 states. [2023-11-21 22:09:03,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4741 to 2961. [2023-11-21 22:09:03,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2961 states, 2960 states have (on average 1.4469594594594595) internal successors, (4283), 2960 states have internal predecessors, (4283), 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) [2023-11-21 22:09:03,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2961 states to 2961 states and 4283 transitions. [2023-11-21 22:09:03,374 INFO L78 Accepts]: Start accepts. Automaton has 2961 states and 4283 transitions. Word has length 55 [2023-11-21 22:09:03,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:09:03,374 INFO L495 AbstractCegarLoop]: Abstraction has 2961 states and 4283 transitions. [2023-11-21 22:09:03,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 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) [2023-11-21 22:09:03,375 INFO L276 IsEmpty]: Start isEmpty. Operand 2961 states and 4283 transitions. [2023-11-21 22:09:03,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-21 22:09:03,376 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:09:03,376 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] [2023-11-21 22:09:03,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-21 22:09:03,377 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:09:03,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:09:03,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1754944274, now seen corresponding path program 1 times [2023-11-21 22:09:03,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:09:03,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309870231] [2023-11-21 22:09:03,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:09:03,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:09:03,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:09:05,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:09:05,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:09:05,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309870231] [2023-11-21 22:09:05,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309870231] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:09:05,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:09:05,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2023-11-21 22:09:05,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115026999] [2023-11-21 22:09:05,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:09:05,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-21 22:09:05,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:09:05,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-21 22:09:05,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2023-11-21 22:09:05,966 INFO L87 Difference]: Start difference. First operand 2961 states and 4283 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 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) [2023-11-21 22:09:09,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:09:09,564 INFO L93 Difference]: Finished difference Result 3320 states and 4781 transitions. [2023-11-21 22:09:09,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-21 22:09:09,565 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 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 56 [2023-11-21 22:09:09,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:09:09,583 INFO L225 Difference]: With dead ends: 3320 [2023-11-21 22:09:09,583 INFO L226 Difference]: Without dead ends: 3318 [2023-11-21 22:09:09,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=390, Invalid=1680, Unknown=0, NotChecked=0, Total=2070 [2023-11-21 22:09:09,586 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 1135 mSDsluCounter, 1339 mSDsCounter, 0 mSdLazyCounter, 2440 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1135 SdHoareTripleChecker+Valid, 1471 SdHoareTripleChecker+Invalid, 2450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:09:09,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1135 Valid, 1471 Invalid, 2450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2440 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-21 22:09:09,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3318 states. [2023-11-21 22:09:09,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3318 to 2961. [2023-11-21 22:09:09,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2961 states, 2960 states have (on average 1.4469594594594595) internal successors, (4283), 2960 states have internal predecessors, (4283), 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) [2023-11-21 22:09:09,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2961 states to 2961 states and 4283 transitions. [2023-11-21 22:09:09,661 INFO L78 Accepts]: Start accepts. Automaton has 2961 states and 4283 transitions. Word has length 56 [2023-11-21 22:09:09,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:09:09,662 INFO L495 AbstractCegarLoop]: Abstraction has 2961 states and 4283 transitions. [2023-11-21 22:09:09,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 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) [2023-11-21 22:09:09,662 INFO L276 IsEmpty]: Start isEmpty. Operand 2961 states and 4283 transitions. [2023-11-21 22:09:09,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-21 22:09:09,663 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:09:09,663 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] [2023-11-21 22:09:09,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-21 22:09:09,664 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:09:09,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:09:09,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1766748366, now seen corresponding path program 1 times [2023-11-21 22:09:09,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:09:09,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167686825] [2023-11-21 22:09:09,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:09:09,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:09:09,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:09:11,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:09:11,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:09:11,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167686825] [2023-11-21 22:09:11,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167686825] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:09:11,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:09:11,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-11-21 22:09:11,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764997227] [2023-11-21 22:09:11,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:09:11,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-21 22:09:11,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:09:11,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-21 22:09:11,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2023-11-21 22:09:11,449 INFO L87 Difference]: Start difference. First operand 2961 states and 4283 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 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) [2023-11-21 22:09:13,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:09:13,997 INFO L93 Difference]: Finished difference Result 4014 states and 5789 transitions. [2023-11-21 22:09:13,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-21 22:09:13,998 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 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 56 [2023-11-21 22:09:13,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:09:14,015 INFO L225 Difference]: With dead ends: 4014 [2023-11-21 22:09:14,015 INFO L226 Difference]: Without dead ends: 3660 [2023-11-21 22:09:14,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=255, Invalid=1077, Unknown=0, NotChecked=0, Total=1332 [2023-11-21 22:09:14,018 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 964 mSDsluCounter, 1477 mSDsCounter, 0 mSdLazyCounter, 2211 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 964 SdHoareTripleChecker+Valid, 1631 SdHoareTripleChecker+Invalid, 2219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 2211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-21 22:09:14,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [964 Valid, 1631 Invalid, 2219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 2211 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-21 22:09:14,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3660 states. [2023-11-21 22:09:14,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3660 to 2961. [2023-11-21 22:09:14,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2961 states, 2960 states have (on average 1.4469594594594595) internal successors, (4283), 2960 states have internal predecessors, (4283), 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) [2023-11-21 22:09:14,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2961 states to 2961 states and 4283 transitions. [2023-11-21 22:09:14,115 INFO L78 Accepts]: Start accepts. Automaton has 2961 states and 4283 transitions. Word has length 56 [2023-11-21 22:09:14,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:09:14,116 INFO L495 AbstractCegarLoop]: Abstraction has 2961 states and 4283 transitions. [2023-11-21 22:09:14,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 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) [2023-11-21 22:09:14,116 INFO L276 IsEmpty]: Start isEmpty. Operand 2961 states and 4283 transitions. [2023-11-21 22:09:14,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-21 22:09:14,122 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:09:14,122 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] [2023-11-21 22:09:14,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-21 22:09:14,122 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:09:14,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:09:14,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1131304690, now seen corresponding path program 1 times [2023-11-21 22:09:14,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:09:14,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279556151] [2023-11-21 22:09:14,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:09:14,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:09:14,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:09:15,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:09:15,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:09:15,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279556151] [2023-11-21 22:09:15,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279556151] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:09:15,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:09:15,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-11-21 22:09:15,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437419979] [2023-11-21 22:09:15,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:09:15,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-21 22:09:15,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:09:15,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-21 22:09:15,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-11-21 22:09:15,296 INFO L87 Difference]: Start difference. First operand 2961 states and 4283 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 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) [2023-11-21 22:09:16,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:09:16,158 INFO L93 Difference]: Finished difference Result 3503 states and 5042 transitions. [2023-11-21 22:09:16,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-21 22:09:16,159 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 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 56 [2023-11-21 22:09:16,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:09:16,179 INFO L225 Difference]: With dead ends: 3503 [2023-11-21 22:09:16,180 INFO L226 Difference]: Without dead ends: 3501 [2023-11-21 22:09:16,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2023-11-21 22:09:16,184 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 432 mSDsluCounter, 1450 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 1684 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-21 22:09:16,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 1684 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-21 22:09:16,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3501 states. [2023-11-21 22:09:16,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3501 to 2970. [2023-11-21 22:09:16,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2970 states, 2969 states have (on average 1.445941394408892) internal successors, (4293), 2969 states have internal predecessors, (4293), 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) [2023-11-21 22:09:16,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2970 states to 2970 states and 4293 transitions. [2023-11-21 22:09:16,245 INFO L78 Accepts]: Start accepts. Automaton has 2970 states and 4293 transitions. Word has length 56 [2023-11-21 22:09:16,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:09:16,245 INFO L495 AbstractCegarLoop]: Abstraction has 2970 states and 4293 transitions. [2023-11-21 22:09:16,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 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) [2023-11-21 22:09:16,246 INFO L276 IsEmpty]: Start isEmpty. Operand 2970 states and 4293 transitions. [2023-11-21 22:09:16,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-21 22:09:16,247 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:09:16,247 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] [2023-11-21 22:09:16,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-21 22:09:16,248 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:09:16,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:09:16,248 INFO L85 PathProgramCache]: Analyzing trace with hash -865331710, now seen corresponding path program 1 times [2023-11-21 22:09:16,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:09:16,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206768909] [2023-11-21 22:09:16,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:09:16,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:09:16,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:09:16,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:09:16,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:09:16,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206768909] [2023-11-21 22:09:16,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206768909] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:09:16,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:09:16,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:09:16,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287588885] [2023-11-21 22:09:16,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:09:16,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:09:16,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:09:16,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:09:16,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:09:16,301 INFO L87 Difference]: Start difference. First operand 2970 states and 4293 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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) [2023-11-21 22:09:16,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:09:16,369 INFO L93 Difference]: Finished difference Result 5059 states and 7364 transitions. [2023-11-21 22:09:16,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:09:16,369 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 57 [2023-11-21 22:09:16,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:09:16,375 INFO L225 Difference]: With dead ends: 5059 [2023-11-21 22:09:16,376 INFO L226 Difference]: Without dead ends: 2881 [2023-11-21 22:09:16,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:09:16,380 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 96 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:09:16,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 267 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:09:16,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2881 states. [2023-11-21 22:09:16,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2881 to 2857. [2023-11-21 22:09:16,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2857 states, 2856 states have (on average 1.4432773109243697) internal successors, (4122), 2856 states have internal predecessors, (4122), 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) [2023-11-21 22:09:16,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2857 states to 2857 states and 4122 transitions. [2023-11-21 22:09:16,449 INFO L78 Accepts]: Start accepts. Automaton has 2857 states and 4122 transitions. Word has length 57 [2023-11-21 22:09:16,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:09:16,450 INFO L495 AbstractCegarLoop]: Abstraction has 2857 states and 4122 transitions. [2023-11-21 22:09:16,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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) [2023-11-21 22:09:16,451 INFO L276 IsEmpty]: Start isEmpty. Operand 2857 states and 4122 transitions. [2023-11-21 22:09:16,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-21 22:09:16,452 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:09:16,452 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] [2023-11-21 22:09:16,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-21 22:09:16,452 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:09:16,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:09:16,453 INFO L85 PathProgramCache]: Analyzing trace with hash 303464293, now seen corresponding path program 1 times [2023-11-21 22:09:16,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:09:16,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797398801] [2023-11-21 22:09:16,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:09:16,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:09:16,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:09:16,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:09:16,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:09:16,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797398801] [2023-11-21 22:09:16,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797398801] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:09:16,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:09:16,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:09:16,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329157231] [2023-11-21 22:09:16,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:09:16,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:09:16,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:09:16,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:09:16,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:09:16,510 INFO L87 Difference]: Start difference. First operand 2857 states and 4122 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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) [2023-11-21 22:09:16,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:09:16,573 INFO L93 Difference]: Finished difference Result 4737 states and 6878 transitions. [2023-11-21 22:09:16,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:09:16,574 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 57 [2023-11-21 22:09:16,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:09:16,579 INFO L225 Difference]: With dead ends: 4737 [2023-11-21 22:09:16,579 INFO L226 Difference]: Without dead ends: 2743 [2023-11-21 22:09:16,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:09:16,583 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 95 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:09:16,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 259 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:09:16,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2743 states. [2023-11-21 22:09:16,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2743 to 2741. [2023-11-21 22:09:16,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2741 states, 2740 states have (on average 1.4408759124087591) internal successors, (3948), 2740 states have internal predecessors, (3948), 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) [2023-11-21 22:09:16,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2741 states to 2741 states and 3948 transitions. [2023-11-21 22:09:16,661 INFO L78 Accepts]: Start accepts. Automaton has 2741 states and 3948 transitions. Word has length 57 [2023-11-21 22:09:16,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:09:16,661 INFO L495 AbstractCegarLoop]: Abstraction has 2741 states and 3948 transitions. [2023-11-21 22:09:16,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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) [2023-11-21 22:09:16,662 INFO L276 IsEmpty]: Start isEmpty. Operand 2741 states and 3948 transitions. [2023-11-21 22:09:16,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-21 22:09:16,663 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:09:16,663 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] [2023-11-21 22:09:16,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-21 22:09:16,663 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:09:16,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:09:16,664 INFO L85 PathProgramCache]: Analyzing trace with hash -577350992, now seen corresponding path program 1 times [2023-11-21 22:09:16,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:09:16,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678897409] [2023-11-21 22:09:16,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:09:16,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:09:16,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:09:16,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:09:16,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:09:16,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678897409] [2023-11-21 22:09:16,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678897409] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:09:16,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:09:16,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:09:16,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711866264] [2023-11-21 22:09:16,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:09:16,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:09:16,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:09:16,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:09:16,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:09:16,715 INFO L87 Difference]: Start difference. First operand 2741 states and 3948 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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) [2023-11-21 22:09:16,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:09:16,781 INFO L93 Difference]: Finished difference Result 4497 states and 6528 transitions. [2023-11-21 22:09:16,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:09:16,781 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 57 [2023-11-21 22:09:16,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:09:16,786 INFO L225 Difference]: With dead ends: 4497 [2023-11-21 22:09:16,786 INFO L226 Difference]: Without dead ends: 2601 [2023-11-21 22:09:16,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:09:16,789 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 96 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:09:16,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 251 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:09:16,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2023-11-21 22:09:16,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2599. [2023-11-21 22:09:16,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2599 states, 2598 states have (on average 1.441493456505004) internal successors, (3745), 2598 states have internal predecessors, (3745), 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) [2023-11-21 22:09:16,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2599 states to 2599 states and 3745 transitions. [2023-11-21 22:09:16,832 INFO L78 Accepts]: Start accepts. Automaton has 2599 states and 3745 transitions. Word has length 57 [2023-11-21 22:09:16,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:09:16,832 INFO L495 AbstractCegarLoop]: Abstraction has 2599 states and 3745 transitions. [2023-11-21 22:09:16,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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) [2023-11-21 22:09:16,832 INFO L276 IsEmpty]: Start isEmpty. Operand 2599 states and 3745 transitions. [2023-11-21 22:09:16,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-21 22:09:16,833 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:09:16,833 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] [2023-11-21 22:09:16,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-21 22:09:16,834 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:09:16,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:09:16,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1261264414, now seen corresponding path program 1 times [2023-11-21 22:09:16,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:09:16,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79765722] [2023-11-21 22:09:16,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:09:16,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:09:16,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:09:17,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:09:17,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:09:17,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79765722] [2023-11-21 22:09:17,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79765722] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:09:17,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:09:17,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-11-21 22:09:17,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625627676] [2023-11-21 22:09:17,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:09:17,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-21 22:09:17,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:09:17,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-21 22:09:17,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-11-21 22:09:17,927 INFO L87 Difference]: Start difference. First operand 2599 states and 3745 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 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) [2023-11-21 22:09:18,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:09:18,588 INFO L93 Difference]: Finished difference Result 4606 states and 6651 transitions. [2023-11-21 22:09:18,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-21 22:09:18,588 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 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 57 [2023-11-21 22:09:18,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:09:18,598 INFO L225 Difference]: With dead ends: 4606 [2023-11-21 22:09:18,598 INFO L226 Difference]: Without dead ends: 4604 [2023-11-21 22:09:18,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2023-11-21 22:09:18,601 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 357 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 22:09:18,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 789 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 22:09:18,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4604 states. [2023-11-21 22:09:18,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4604 to 2589. [2023-11-21 22:09:18,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2589 states, 2588 states have (on average 1.4431993817619784) internal successors, (3735), 2588 states have internal predecessors, (3735), 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) [2023-11-21 22:09:18,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2589 states to 2589 states and 3735 transitions. [2023-11-21 22:09:18,662 INFO L78 Accepts]: Start accepts. Automaton has 2589 states and 3735 transitions. Word has length 57 [2023-11-21 22:09:18,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:09:18,662 INFO L495 AbstractCegarLoop]: Abstraction has 2589 states and 3735 transitions. [2023-11-21 22:09:18,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 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) [2023-11-21 22:09:18,663 INFO L276 IsEmpty]: Start isEmpty. Operand 2589 states and 3735 transitions. [2023-11-21 22:09:18,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-21 22:09:18,664 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:09:18,664 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] [2023-11-21 22:09:18,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-21 22:09:18,664 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:09:18,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:09:18,665 INFO L85 PathProgramCache]: Analyzing trace with hash -998317662, now seen corresponding path program 1 times [2023-11-21 22:09:18,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:09:18,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419397868] [2023-11-21 22:09:18,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:09:18,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:09:18,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:09:19,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:09:19,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:09:19,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419397868] [2023-11-21 22:09:19,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419397868] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:09:19,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:09:19,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-11-21 22:09:19,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956831105] [2023-11-21 22:09:19,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:09:19,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-21 22:09:19,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:09:19,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-21 22:09:19,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2023-11-21 22:09:19,761 INFO L87 Difference]: Start difference. First operand 2589 states and 3735 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 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) [2023-11-21 22:09:20,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:09:20,652 INFO L93 Difference]: Finished difference Result 4308 states and 6209 transitions. [2023-11-21 22:09:20,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-21 22:09:20,653 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 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 57 [2023-11-21 22:09:20,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:09:20,661 INFO L225 Difference]: With dead ends: 4308 [2023-11-21 22:09:20,661 INFO L226 Difference]: Without dead ends: 4306 [2023-11-21 22:09:20,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2023-11-21 22:09:20,664 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 421 mSDsluCounter, 1482 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 1737 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-21 22:09:20,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 1737 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-21 22:09:20,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4306 states. [2023-11-21 22:09:20,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4306 to 2589. [2023-11-21 22:09:20,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2589 states, 2588 states have (on average 1.4431993817619784) internal successors, (3735), 2588 states have internal predecessors, (3735), 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) [2023-11-21 22:09:20,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2589 states to 2589 states and 3735 transitions. [2023-11-21 22:09:20,738 INFO L78 Accepts]: Start accepts. Automaton has 2589 states and 3735 transitions. Word has length 57 [2023-11-21 22:09:20,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:09:20,738 INFO L495 AbstractCegarLoop]: Abstraction has 2589 states and 3735 transitions. [2023-11-21 22:09:20,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 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) [2023-11-21 22:09:20,738 INFO L276 IsEmpty]: Start isEmpty. Operand 2589 states and 3735 transitions. [2023-11-21 22:09:20,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-21 22:09:20,739 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:09:20,740 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] [2023-11-21 22:09:20,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-21 22:09:20,740 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:09:20,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:09:20,741 INFO L85 PathProgramCache]: Analyzing trace with hash -225043006, now seen corresponding path program 1 times [2023-11-21 22:09:20,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:09:20,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095277206] [2023-11-21 22:09:20,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:09:20,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:09:20,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:09:21,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:09:21,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:09:21,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095277206] [2023-11-21 22:09:21,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095277206] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:09:21,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:09:21,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-11-21 22:09:21,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349438432] [2023-11-21 22:09:21,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:09:21,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-21 22:09:21,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:09:21,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-21 22:09:21,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2023-11-21 22:09:21,767 INFO L87 Difference]: Start difference. First operand 2589 states and 3735 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 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) [2023-11-21 22:09:22,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:09:22,682 INFO L93 Difference]: Finished difference Result 5666 states and 8198 transitions. [2023-11-21 22:09:22,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-21 22:09:22,682 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 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 57 [2023-11-21 22:09:22,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:09:22,692 INFO L225 Difference]: With dead ends: 5666 [2023-11-21 22:09:22,692 INFO L226 Difference]: Without dead ends: 5024 [2023-11-21 22:09:22,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2023-11-21 22:09:22,696 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 427 mSDsluCounter, 1572 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 1806 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-21 22:09:22,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 1806 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-21 22:09:22,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5024 states. [2023-11-21 22:09:22,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5024 to 2853. [2023-11-21 22:09:22,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2853 states, 2852 states have (on average 1.437938288920056) internal successors, (4101), 2852 states have internal predecessors, (4101), 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) [2023-11-21 22:09:22,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2853 states to 2853 states and 4101 transitions. [2023-11-21 22:09:22,756 INFO L78 Accepts]: Start accepts. Automaton has 2853 states and 4101 transitions. Word has length 57 [2023-11-21 22:09:22,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:09:22,756 INFO L495 AbstractCegarLoop]: Abstraction has 2853 states and 4101 transitions. [2023-11-21 22:09:22,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 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) [2023-11-21 22:09:22,757 INFO L276 IsEmpty]: Start isEmpty. Operand 2853 states and 4101 transitions. [2023-11-21 22:09:22,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-21 22:09:22,758 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:09:22,758 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] [2023-11-21 22:09:22,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-21 22:09:22,758 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:09:22,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:09:22,759 INFO L85 PathProgramCache]: Analyzing trace with hash 749527526, now seen corresponding path program 1 times [2023-11-21 22:09:22,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:09:22,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170527476] [2023-11-21 22:09:22,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:09:22,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:09:22,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:09:26,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:09:26,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:09:26,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170527476] [2023-11-21 22:09:26,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170527476] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:09:26,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:09:26,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2023-11-21 22:09:26,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775476047] [2023-11-21 22:09:26,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:09:26,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-21 22:09:26,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:09:26,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-21 22:09:26,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=789, Unknown=0, NotChecked=0, Total=870 [2023-11-21 22:09:26,820 INFO L87 Difference]: Start difference. First operand 2853 states and 4101 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 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)