./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.protocols.2.prop1-back-serstep.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dac30ecf-2f42-4afb-8d6d-7848f61dac5b/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dac30ecf-2f42-4afb-8d6d-7848f61dac5b/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dac30ecf-2f42-4afb-8d6d-7848f61dac5b/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dac30ecf-2f42-4afb-8d6d-7848f61dac5b/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.protocols.2.prop1-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dac30ecf-2f42-4afb-8d6d-7848f61dac5b/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dac30ecf-2f42-4afb-8d6d-7848f61dac5b/bin/uautomizer-verify-zZY32mL2XJ --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 64bit --witnessprinter.graph.data.programhash 87b63b5e380bb6db7d619c72eb4f386dd2a151898d57957012363e2c778901d8 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:37:21,429 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:37:21,550 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dac30ecf-2f42-4afb-8d6d-7848f61dac5b/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-64bit-Automizer_Default.epf [2023-11-23 21:37:21,555 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:37:21,555 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:37:21,599 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:37:21,600 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:37:21,601 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:37:21,604 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 21:37:21,613 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 21:37:21,614 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:37:21,614 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:37:21,615 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 21:37:21,617 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 21:37:21,618 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 21:37:21,618 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:37:21,619 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:37:21,619 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:37:21,620 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:37:21,620 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:37:21,621 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:37:21,621 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:37:21,622 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:37:21,622 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:37:21,623 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:37:21,624 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 21:37:21,624 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:37:21,625 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:37:21,625 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:37:21,626 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:37:21,627 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:37:21,628 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:37:21,628 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 21:37:21,628 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:37:21,629 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:37:21,629 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 21:37:21,629 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:37:21,630 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 21:37:21,630 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:37:21,630 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_dac30ecf-2f42-4afb-8d6d-7848f61dac5b/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dac30ecf-2f42-4afb-8d6d-7848f61dac5b/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87b63b5e380bb6db7d619c72eb4f386dd2a151898d57957012363e2c778901d8 [2023-11-23 21:37:21,931 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:37:21,955 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:37:21,958 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:37:21,959 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:37:21,960 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:37:21,961 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dac30ecf-2f42-4afb-8d6d-7848f61dac5b/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.protocols.2.prop1-back-serstep.c [2023-11-23 21:37:25,229 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:37:25,623 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:37:25,624 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dac30ecf-2f42-4afb-8d6d-7848f61dac5b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.protocols.2.prop1-back-serstep.c [2023-11-23 21:37:25,657 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dac30ecf-2f42-4afb-8d6d-7848f61dac5b/bin/uautomizer-verify-zZY32mL2XJ/data/05d010adf/849144353bcf4a76846f9f430fddd368/FLAG3cf58b5de [2023-11-23 21:37:25,679 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dac30ecf-2f42-4afb-8d6d-7848f61dac5b/bin/uautomizer-verify-zZY32mL2XJ/data/05d010adf/849144353bcf4a76846f9f430fddd368 [2023-11-23 21:37:25,684 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:37:25,686 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:37:25,691 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:37:25,691 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:37:25,698 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:37:25,699 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:37:25" (1/1) ... [2023-11-23 21:37:25,701 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6570c4e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:37:25, skipping insertion in model container [2023-11-23 21:37:25,701 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:37:25" (1/1) ... [2023-11-23 21:37:25,797 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:37:26,055 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_dac30ecf-2f42-4afb-8d6d-7848f61dac5b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.protocols.2.prop1-back-serstep.c[1177,1190] [2023-11-23 21:37:26,639 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:37:26,652 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:37:26,667 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_dac30ecf-2f42-4afb-8d6d-7848f61dac5b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.protocols.2.prop1-back-serstep.c[1177,1190] [2023-11-23 21:37:26,810 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:37:26,828 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:37:26,828 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:37:26 WrapperNode [2023-11-23 21:37:26,829 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:37:26,830 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:37:26,831 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:37:26,831 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:37:26,840 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:37:26" (1/1) ... [2023-11-23 21:37:26,938 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:37:26" (1/1) ... [2023-11-23 21:37:27,827 INFO L138 Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 5381 [2023-11-23 21:37:27,828 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:37:27,829 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:37:27,829 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:37:27,830 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:37:27,857 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:37:26" (1/1) ... [2023-11-23 21:37:27,857 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:37:26" (1/1) ... [2023-11-23 21:37:28,070 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:37:26" (1/1) ... [2023-11-23 21:37:28,343 INFO L189 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-23 21:37:28,357 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:37:26" (1/1) ... [2023-11-23 21:37:28,358 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:37:26" (1/1) ... [2023-11-23 21:37:28,666 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:37:26" (1/1) ... [2023-11-23 21:37:28,735 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:37:26" (1/1) ... [2023-11-23 21:37:28,762 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:37:26" (1/1) ... [2023-11-23 21:37:28,793 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:37:26" (1/1) ... [2023-11-23 21:37:28,942 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:37:28,944 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:37:28,944 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:37:28,945 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:37:28,946 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:37:26" (1/1) ... [2023-11-23 21:37:28,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:37:28,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dac30ecf-2f42-4afb-8d6d-7848f61dac5b/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:37:28,985 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dac30ecf-2f42-4afb-8d6d-7848f61dac5b/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:37:29,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dac30ecf-2f42-4afb-8d6d-7848f61dac5b/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:37:29,042 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:37:29,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 21:37:29,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:37:29,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:37:29,518 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:37:29,521 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:37:34,898 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:37:35,063 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:37:35,064 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 21:37:35,065 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:37:35 BoogieIcfgContainer [2023-11-23 21:37:35,065 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:37:35,067 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:37:35,067 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:37:35,076 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:37:35,076 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:37:25" (1/3) ... [2023-11-23 21:37:35,078 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@632779f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:37:35, skipping insertion in model container [2023-11-23 21:37:35,078 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:37:26" (2/3) ... [2023-11-23 21:37:35,081 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@632779f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:37:35, skipping insertion in model container [2023-11-23 21:37:35,081 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:37:35" (3/3) ... [2023-11-23 21:37:35,083 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.protocols.2.prop1-back-serstep.c [2023-11-23 21:37:35,112 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:37:35,112 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:37:35,236 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:37:35,247 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;@2fa4f014, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:37:35,247 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:37:35,263 INFO L276 IsEmpty]: Start isEmpty. Operand has 1196 states, 1194 states have (on average 1.6666666666666667) internal successors, (1990), 1195 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:35,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2023-11-23 21:37:35,287 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:37:35,289 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:35,289 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:37:35,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:35,296 INFO L85 PathProgramCache]: Analyzing trace with hash -481480124, now seen corresponding path program 1 times [2023-11-23 21:37:35,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:35,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577771412] [2023-11-23 21:37:35,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:35,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:36,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:37,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:37,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:37,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577771412] [2023-11-23 21:37:37,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577771412] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:37:37,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:37:37,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:37:37,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409842056] [2023-11-23 21:37:37,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:37:37,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:37:37,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:37:37,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:37:37,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:37:37,303 INFO L87 Difference]: Start difference. First operand has 1196 states, 1194 states have (on average 1.6666666666666667) internal successors, (1990), 1195 states have internal predecessors, (1990), 0 states have call successors, (0), 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 4 states, 4 states have (on average 51.5) internal successors, (206), 4 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:37,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:37:37,513 INFO L93 Difference]: Finished difference Result 2307 states and 3841 transitions. [2023-11-23 21:37:37,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:37:37,515 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.5) internal successors, (206), 4 states have internal predecessors, (206), 0 states have call successors, (0), 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 206 [2023-11-23 21:37:37,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:37:37,546 INFO L225 Difference]: With dead ends: 2307 [2023-11-23 21:37:37,546 INFO L226 Difference]: Without dead ends: 1196 [2023-11-23 21:37:37,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:37:37,562 INFO L413 NwaCegarLoop]: 1983 mSDtfsCounter, 1 mSDsluCounter, 3961 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 5944 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:37:37,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 5944 Invalid, 13 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:37:37,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2023-11-23 21:37:37,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 1196. [2023-11-23 21:37:37,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1196 states, 1195 states have (on average 1.6635983263598326) internal successors, (1988), 1195 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:37,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1196 states to 1196 states and 1988 transitions. [2023-11-23 21:37:37,688 INFO L78 Accepts]: Start accepts. Automaton has 1196 states and 1988 transitions. Word has length 206 [2023-11-23 21:37:37,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:37:37,694 INFO L495 AbstractCegarLoop]: Abstraction has 1196 states and 1988 transitions. [2023-11-23 21:37:37,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.5) internal successors, (206), 4 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:37,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1196 states and 1988 transitions. [2023-11-23 21:37:37,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-11-23 21:37:37,708 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:37:37,709 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:37,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:37:37,710 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:37:37,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:37,711 INFO L85 PathProgramCache]: Analyzing trace with hash -2039255796, now seen corresponding path program 1 times [2023-11-23 21:37:37,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:37,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855133645] [2023-11-23 21:37:37,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:37,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:37,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:38,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:38,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:38,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855133645] [2023-11-23 21:37:38,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855133645] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:37:38,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:37:38,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:37:38,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677866167] [2023-11-23 21:37:38,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:37:38,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:37:38,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:37:38,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:37:38,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:37:38,522 INFO L87 Difference]: Start difference. First operand 1196 states and 1988 transitions. Second operand has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:38,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:37:38,651 INFO L93 Difference]: Finished difference Result 2310 states and 3839 transitions. [2023-11-23 21:37:38,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:37:38,652 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 0 states have call successors, (0), 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 207 [2023-11-23 21:37:38,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:37:38,665 INFO L225 Difference]: With dead ends: 2310 [2023-11-23 21:37:38,665 INFO L226 Difference]: Without dead ends: 1199 [2023-11-23 21:37:38,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:37:38,671 INFO L413 NwaCegarLoop]: 1983 mSDtfsCounter, 1 mSDsluCounter, 3959 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 5942 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:37:38,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 5942 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:37:38,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2023-11-23 21:37:38,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 1198. [2023-11-23 21:37:38,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 1.6624895572263994) internal successors, (1990), 1197 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:38,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 1990 transitions. [2023-11-23 21:37:38,707 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 1990 transitions. Word has length 207 [2023-11-23 21:37:38,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:37:38,709 INFO L495 AbstractCegarLoop]: Abstraction has 1198 states and 1990 transitions. [2023-11-23 21:37:38,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:38,710 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 1990 transitions. [2023-11-23 21:37:38,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2023-11-23 21:37:38,713 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:37:38,713 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:38,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:37:38,714 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:37:38,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:38,725 INFO L85 PathProgramCache]: Analyzing trace with hash 997148510, now seen corresponding path program 1 times [2023-11-23 21:37:38,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:38,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381925733] [2023-11-23 21:37:38,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:38,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:38,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:39,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:39,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:39,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381925733] [2023-11-23 21:37:39,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381925733] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:37:39,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:37:39,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:37:39,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939002548] [2023-11-23 21:37:39,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:37:39,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:37:39,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:37:39,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:37:39,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:37:39,611 INFO L87 Difference]: Start difference. First operand 1198 states and 1990 transitions. Second operand has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:39,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:37:39,781 INFO L93 Difference]: Finished difference Result 3418 states and 5679 transitions. [2023-11-23 21:37:39,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:37:39,782 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 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 208 [2023-11-23 21:37:39,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:37:39,796 INFO L225 Difference]: With dead ends: 3418 [2023-11-23 21:37:39,796 INFO L226 Difference]: Without dead ends: 2305 [2023-11-23 21:37:39,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:37:39,801 INFO L413 NwaCegarLoop]: 2338 mSDtfsCounter, 1836 mSDsluCounter, 4312 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1836 SdHoareTripleChecker+Valid, 6650 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:37:39,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1836 Valid, 6650 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:37:39,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2305 states. [2023-11-23 21:37:39,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2305 to 1200. [2023-11-23 21:37:39,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 1199 states have (on average 1.6613844870725605) internal successors, (1992), 1199 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:39,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 1992 transitions. [2023-11-23 21:37:39,845 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 1992 transitions. Word has length 208 [2023-11-23 21:37:39,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:37:39,846 INFO L495 AbstractCegarLoop]: Abstraction has 1200 states and 1992 transitions. [2023-11-23 21:37:39,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:39,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 1992 transitions. [2023-11-23 21:37:39,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2023-11-23 21:37:39,850 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:37:39,850 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:39,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:37:39,851 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:37:39,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:39,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1848226574, now seen corresponding path program 1 times [2023-11-23 21:37:39,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:39,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125254482] [2023-11-23 21:37:39,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:39,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:39,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:40,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:40,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:40,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125254482] [2023-11-23 21:37:40,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125254482] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:37:40,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:37:40,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:37:40,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932615063] [2023-11-23 21:37:40,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:37:40,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:37:40,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:37:40,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:37:40,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:37:40,648 INFO L87 Difference]: Start difference. First operand 1200 states and 1992 transitions. Second operand has 4 states, 4 states have (on average 52.25) internal successors, (209), 4 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:40,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:37:40,815 INFO L93 Difference]: Finished difference Result 3421 states and 5680 transitions. [2023-11-23 21:37:40,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:37:40,816 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.25) internal successors, (209), 4 states have internal predecessors, (209), 0 states have call successors, (0), 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 209 [2023-11-23 21:37:40,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:37:40,832 INFO L225 Difference]: With dead ends: 3421 [2023-11-23 21:37:40,832 INFO L226 Difference]: Without dead ends: 2306 [2023-11-23 21:37:40,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:37:40,848 INFO L413 NwaCegarLoop]: 2333 mSDtfsCounter, 1833 mSDsluCounter, 4307 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1833 SdHoareTripleChecker+Valid, 6640 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:37:40,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1833 Valid, 6640 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:37:40,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2023-11-23 21:37:40,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 1202. [2023-11-23 21:37:40,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1202 states, 1201 states have (on average 1.6602830974188176) internal successors, (1994), 1201 states have internal predecessors, (1994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:40,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1202 states to 1202 states and 1994 transitions. [2023-11-23 21:37:40,907 INFO L78 Accepts]: Start accepts. Automaton has 1202 states and 1994 transitions. Word has length 209 [2023-11-23 21:37:40,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:37:40,908 INFO L495 AbstractCegarLoop]: Abstraction has 1202 states and 1994 transitions. [2023-11-23 21:37:40,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.25) internal successors, (209), 4 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:40,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1202 states and 1994 transitions. [2023-11-23 21:37:40,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2023-11-23 21:37:40,913 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:37:40,914 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:40,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:37:40,915 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:37:40,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:40,916 INFO L85 PathProgramCache]: Analyzing trace with hash -535443590, now seen corresponding path program 1 times [2023-11-23 21:37:40,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:40,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184905216] [2023-11-23 21:37:40,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:40,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:41,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:41,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:41,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:41,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184905216] [2023-11-23 21:37:41,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184905216] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:37:41,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:37:41,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:37:41,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909047597] [2023-11-23 21:37:41,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:37:41,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:37:41,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:37:41,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:37:41,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:37:41,573 INFO L87 Difference]: Start difference. First operand 1202 states and 1994 transitions. Second operand has 4 states, 4 states have (on average 52.5) internal successors, (210), 4 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:41,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:37:41,717 INFO L93 Difference]: Finished difference Result 3424 states and 5681 transitions. [2023-11-23 21:37:41,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:37:41,718 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 4 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 210 [2023-11-23 21:37:41,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:37:41,733 INFO L225 Difference]: With dead ends: 3424 [2023-11-23 21:37:41,734 INFO L226 Difference]: Without dead ends: 2307 [2023-11-23 21:37:41,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:37:41,742 INFO L413 NwaCegarLoop]: 2328 mSDtfsCounter, 1830 mSDsluCounter, 4302 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1830 SdHoareTripleChecker+Valid, 6630 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:37:41,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1830 Valid, 6630 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:37:41,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2307 states. [2023-11-23 21:37:41,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2307 to 1204. [2023-11-23 21:37:41,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1204 states, 1203 states have (on average 1.659185369908562) internal successors, (1996), 1203 states have internal predecessors, (1996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:41,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 1996 transitions. [2023-11-23 21:37:41,844 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 1996 transitions. Word has length 210 [2023-11-23 21:37:41,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:37:41,845 INFO L495 AbstractCegarLoop]: Abstraction has 1204 states and 1996 transitions. [2023-11-23 21:37:41,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 4 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:41,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 1996 transitions. [2023-11-23 21:37:41,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2023-11-23 21:37:41,849 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:37:41,849 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:41,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:37:41,850 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:37:41,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:41,851 INFO L85 PathProgramCache]: Analyzing trace with hash -2038936614, now seen corresponding path program 1 times [2023-11-23 21:37:41,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:41,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062523178] [2023-11-23 21:37:41,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:41,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:41,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:42,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:42,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:42,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062523178] [2023-11-23 21:37:42,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062523178] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:37:42,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:37:42,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:37:42,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537284590] [2023-11-23 21:37:42,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:37:42,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:37:42,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:37:42,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:37:42,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:37:42,602 INFO L87 Difference]: Start difference. First operand 1204 states and 1996 transitions. Second operand has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:42,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:37:42,774 INFO L93 Difference]: Finished difference Result 3427 states and 5682 transitions. [2023-11-23 21:37:42,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:37:42,775 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 0 states have call successors, (0), 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 211 [2023-11-23 21:37:42,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:37:42,789 INFO L225 Difference]: With dead ends: 3427 [2023-11-23 21:37:42,790 INFO L226 Difference]: Without dead ends: 2308 [2023-11-23 21:37:42,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:37:42,795 INFO L413 NwaCegarLoop]: 2323 mSDtfsCounter, 1827 mSDsluCounter, 6123 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1827 SdHoareTripleChecker+Valid, 8446 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:37:42,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1827 Valid, 8446 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:37:42,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2023-11-23 21:37:42,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 1206. [2023-11-23 21:37:42,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1205 states have (on average 1.658091286307054) internal successors, (1998), 1205 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:42,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 1998 transitions. [2023-11-23 21:37:42,851 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 1998 transitions. Word has length 211 [2023-11-23 21:37:42,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:37:42,852 INFO L495 AbstractCegarLoop]: Abstraction has 1206 states and 1998 transitions. [2023-11-23 21:37:42,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:42,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 1998 transitions. [2023-11-23 21:37:42,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2023-11-23 21:37:42,863 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:37:42,863 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:42,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:37:42,864 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:37:42,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:42,864 INFO L85 PathProgramCache]: Analyzing trace with hash -623527788, now seen corresponding path program 1 times [2023-11-23 21:37:42,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:42,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708391942] [2023-11-23 21:37:42,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:42,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:42,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:43,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:43,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:43,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708391942] [2023-11-23 21:37:43,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708391942] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:37:43,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:37:43,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:37:43,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643112969] [2023-11-23 21:37:43,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:37:43,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:37:43,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:37:43,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:37:43,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:37:43,586 INFO L87 Difference]: Start difference. First operand 1206 states and 1998 transitions. Second operand has 5 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:43,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:37:43,743 INFO L93 Difference]: Finished difference Result 3430 states and 5683 transitions. [2023-11-23 21:37:43,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:37:43,744 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 0 states have call successors, (0), 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 212 [2023-11-23 21:37:43,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:37:43,757 INFO L225 Difference]: With dead ends: 3430 [2023-11-23 21:37:43,758 INFO L226 Difference]: Without dead ends: 2309 [2023-11-23 21:37:43,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:37:43,762 INFO L413 NwaCegarLoop]: 2318 mSDtfsCounter, 1824 mSDsluCounter, 6115 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1824 SdHoareTripleChecker+Valid, 8433 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:37:43,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1824 Valid, 8433 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:37:43,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2309 states. [2023-11-23 21:37:43,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2309 to 1208. [2023-11-23 21:37:43,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1207 states have (on average 1.6570008285004143) internal successors, (2000), 1207 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:43,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 2000 transitions. [2023-11-23 21:37:43,808 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 2000 transitions. Word has length 212 [2023-11-23 21:37:43,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:37:43,809 INFO L495 AbstractCegarLoop]: Abstraction has 1208 states and 2000 transitions. [2023-11-23 21:37:43,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:43,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 2000 transitions. [2023-11-23 21:37:43,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2023-11-23 21:37:43,813 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:37:43,814 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:43,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:37:43,814 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:37:43,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:43,815 INFO L85 PathProgramCache]: Analyzing trace with hash -951308352, now seen corresponding path program 1 times [2023-11-23 21:37:43,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:43,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854342869] [2023-11-23 21:37:43,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:43,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:43,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:44,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:44,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:44,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854342869] [2023-11-23 21:37:44,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854342869] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:37:44,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:37:44,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:37:44,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945411793] [2023-11-23 21:37:44,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:37:44,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:37:44,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:37:44,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:37:44,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:37:44,404 INFO L87 Difference]: Start difference. First operand 1208 states and 2000 transitions. Second operand has 4 states, 4 states have (on average 53.25) internal successors, (213), 4 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:44,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:37:44,533 INFO L93 Difference]: Finished difference Result 3433 states and 5684 transitions. [2023-11-23 21:37:44,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:37:44,534 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.25) internal successors, (213), 4 states have internal predecessors, (213), 0 states have call successors, (0), 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 213 [2023-11-23 21:37:44,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:37:44,547 INFO L225 Difference]: With dead ends: 3433 [2023-11-23 21:37:44,547 INFO L226 Difference]: Without dead ends: 2310 [2023-11-23 21:37:44,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:37:44,551 INFO L413 NwaCegarLoop]: 2313 mSDtfsCounter, 1821 mSDsluCounter, 4287 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1821 SdHoareTripleChecker+Valid, 6600 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:37:44,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1821 Valid, 6600 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:37:44,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2023-11-23 21:37:44,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 1210. [2023-11-23 21:37:44,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1209 states have (on average 1.6559139784946237) internal successors, (2002), 1209 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:44,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 2002 transitions. [2023-11-23 21:37:44,596 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 2002 transitions. Word has length 213 [2023-11-23 21:37:44,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:37:44,596 INFO L495 AbstractCegarLoop]: Abstraction has 1210 states and 2002 transitions. [2023-11-23 21:37:44,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.25) internal successors, (213), 4 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:44,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 2002 transitions. [2023-11-23 21:37:44,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2023-11-23 21:37:44,600 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:37:44,600 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:44,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 21:37:44,601 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:37:44,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:44,602 INFO L85 PathProgramCache]: Analyzing trace with hash 100065712, now seen corresponding path program 1 times [2023-11-23 21:37:44,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:44,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642596972] [2023-11-23 21:37:44,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:44,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:44,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:45,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:45,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:45,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642596972] [2023-11-23 21:37:45,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642596972] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:37:45,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:37:45,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:37:45,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437347720] [2023-11-23 21:37:45,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:37:45,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:37:45,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:37:45,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:37:45,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:37:45,118 INFO L87 Difference]: Start difference. First operand 1210 states and 2002 transitions. Second operand has 4 states, 4 states have (on average 53.5) internal successors, (214), 4 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:45,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:37:45,315 INFO L93 Difference]: Finished difference Result 3436 states and 5685 transitions. [2023-11-23 21:37:45,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:37:45,316 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.5) internal successors, (214), 4 states have internal predecessors, (214), 0 states have call successors, (0), 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 214 [2023-11-23 21:37:45,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:37:45,330 INFO L225 Difference]: With dead ends: 3436 [2023-11-23 21:37:45,330 INFO L226 Difference]: Without dead ends: 2311 [2023-11-23 21:37:45,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:37:45,334 INFO L413 NwaCegarLoop]: 2308 mSDtfsCounter, 1818 mSDsluCounter, 4282 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1818 SdHoareTripleChecker+Valid, 6590 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:37:45,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1818 Valid, 6590 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:37:45,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2311 states. [2023-11-23 21:37:45,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2311 to 1212. [2023-11-23 21:37:45,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1212 states, 1211 states have (on average 1.6548307184145334) internal successors, (2004), 1211 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:45,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 2004 transitions. [2023-11-23 21:37:45,384 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 2004 transitions. Word has length 214 [2023-11-23 21:37:45,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:37:45,384 INFO L495 AbstractCegarLoop]: Abstraction has 1212 states and 2004 transitions. [2023-11-23 21:37:45,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.5) internal successors, (214), 4 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:45,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 2004 transitions. [2023-11-23 21:37:45,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2023-11-23 21:37:45,388 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:37:45,388 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:45,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 21:37:45,389 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:37:45,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:45,389 INFO L85 PathProgramCache]: Analyzing trace with hash 7831464, now seen corresponding path program 1 times [2023-11-23 21:37:45,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:45,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009889152] [2023-11-23 21:37:45,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:45,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:45,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:46,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:46,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:46,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009889152] [2023-11-23 21:37:46,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009889152] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:37:46,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:37:46,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:37:46,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412762557] [2023-11-23 21:37:46,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:37:46,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:37:46,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:37:46,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:37:46,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:37:46,004 INFO L87 Difference]: Start difference. First operand 1212 states and 2004 transitions. Second operand has 6 states, 6 states have (on average 35.833333333333336) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:47,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:37:47,768 INFO L93 Difference]: Finished difference Result 5420 states and 8899 transitions. [2023-11-23 21:37:47,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:37:47,773 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 35.833333333333336) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 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 215 [2023-11-23 21:37:47,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:37:47,797 INFO L225 Difference]: With dead ends: 5420 [2023-11-23 21:37:47,797 INFO L226 Difference]: Without dead ends: 2339 [2023-11-23 21:37:47,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-11-23 21:37:47,806 INFO L413 NwaCegarLoop]: 1965 mSDtfsCounter, 12716 mSDsluCounter, 5306 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12716 SdHoareTripleChecker+Valid, 7271 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:37:47,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12716 Valid, 7271 Invalid, 1043 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [185 Valid, 858 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-23 21:37:47,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2339 states. [2023-11-23 21:37:47,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2339 to 1316. [2023-11-23 21:37:47,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1316 states, 1315 states have (on average 1.6547528517110266) internal successors, (2176), 1315 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:47,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1316 states to 1316 states and 2176 transitions. [2023-11-23 21:37:47,862 INFO L78 Accepts]: Start accepts. Automaton has 1316 states and 2176 transitions. Word has length 215 [2023-11-23 21:37:47,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:37:47,863 INFO L495 AbstractCegarLoop]: Abstraction has 1316 states and 2176 transitions. [2023-11-23 21:37:47,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 35.833333333333336) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:47,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1316 states and 2176 transitions. [2023-11-23 21:37:47,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2023-11-23 21:37:47,867 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:37:47,867 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:47,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-23 21:37:47,868 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:37:47,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:47,869 INFO L85 PathProgramCache]: Analyzing trace with hash -192416708, now seen corresponding path program 1 times [2023-11-23 21:37:47,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:47,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603893071] [2023-11-23 21:37:47,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:47,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:48,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:48,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:48,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:48,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603893071] [2023-11-23 21:37:48,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603893071] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:37:48,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:37:48,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:37:48,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644587756] [2023-11-23 21:37:48,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:37:48,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:37:48,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:37:48,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:37:48,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:37:48,680 INFO L87 Difference]: Start difference. First operand 1316 states and 2176 transitions. Second operand has 6 states, 6 states have (on average 36.0) internal successors, (216), 5 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:50,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:37:50,277 INFO L93 Difference]: Finished difference Result 3518 states and 5806 transitions. [2023-11-23 21:37:50,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:37:50,279 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 36.0) internal successors, (216), 5 states have internal predecessors, (216), 0 states have call successors, (0), 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 216 [2023-11-23 21:37:50,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:37:50,294 INFO L225 Difference]: With dead ends: 3518 [2023-11-23 21:37:50,295 INFO L226 Difference]: Without dead ends: 2391 [2023-11-23 21:37:50,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:37:50,298 INFO L413 NwaCegarLoop]: 1635 mSDtfsCounter, 7315 mSDsluCounter, 3542 mSDsCounter, 0 mSdLazyCounter, 1028 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7315 SdHoareTripleChecker+Valid, 5177 SdHoareTripleChecker+Invalid, 1054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:37:50,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7315 Valid, 5177 Invalid, 1054 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [26 Valid, 1028 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-23 21:37:50,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2023-11-23 21:37:50,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 1322. [2023-11-23 21:37:50,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1322 states, 1321 states have (on average 1.6540499621498865) internal successors, (2185), 1321 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:50,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 2185 transitions. [2023-11-23 21:37:50,354 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 2185 transitions. Word has length 216 [2023-11-23 21:37:50,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:37:50,355 INFO L495 AbstractCegarLoop]: Abstraction has 1322 states and 2185 transitions. [2023-11-23 21:37:50,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 36.0) internal successors, (216), 5 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:50,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 2185 transitions. [2023-11-23 21:37:50,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2023-11-23 21:37:50,359 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:37:50,359 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:50,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-23 21:37:50,360 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:37:50,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:50,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1269251980, now seen corresponding path program 1 times [2023-11-23 21:37:50,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:50,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939424927] [2023-11-23 21:37:50,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:50,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:50,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:50,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:50,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:50,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939424927] [2023-11-23 21:37:50,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939424927] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:37:50,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:37:50,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:37:50,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265206552] [2023-11-23 21:37:50,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:37:50,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:37:50,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:37:50,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:37:50,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:37:50,998 INFO L87 Difference]: Start difference. First operand 1322 states and 2185 transitions. Second operand has 5 states, 5 states have (on average 43.4) internal successors, (217), 5 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:51,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:37:51,134 INFO L93 Difference]: Finished difference Result 3549 states and 5867 transitions. [2023-11-23 21:37:51,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:37:51,135 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 43.4) internal successors, (217), 5 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 217 [2023-11-23 21:37:51,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:37:51,160 INFO L225 Difference]: With dead ends: 3549 [2023-11-23 21:37:51,168 INFO L226 Difference]: Without dead ends: 2422 [2023-11-23 21:37:51,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:37:51,171 INFO L413 NwaCegarLoop]: 2301 mSDtfsCounter, 1815 mSDsluCounter, 6573 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1815 SdHoareTripleChecker+Valid, 8874 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:37:51,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1815 Valid, 8874 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:37:51,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2422 states. [2023-11-23 21:37:51,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2422 to 1324. [2023-11-23 21:37:51,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 1.653061224489796) internal successors, (2187), 1323 states have internal predecessors, (2187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:51,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 2187 transitions. [2023-11-23 21:37:51,222 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 2187 transitions. Word has length 217 [2023-11-23 21:37:51,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:37:51,223 INFO L495 AbstractCegarLoop]: Abstraction has 1324 states and 2187 transitions. [2023-11-23 21:37:51,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.4) internal successors, (217), 5 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:51,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 2187 transitions. [2023-11-23 21:37:51,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2023-11-23 21:37:51,228 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:37:51,228 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:51,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-23 21:37:51,229 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:37:51,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:51,229 INFO L85 PathProgramCache]: Analyzing trace with hash 153094014, now seen corresponding path program 1 times [2023-11-23 21:37:51,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:51,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611265297] [2023-11-23 21:37:51,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:51,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:51,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:51,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:51,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:51,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611265297] [2023-11-23 21:37:51,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611265297] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:37:51,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:37:51,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:37:51,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030116070] [2023-11-23 21:37:51,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:37:51,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:37:51,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:37:51,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:37:51,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:37:51,796 INFO L87 Difference]: Start difference. First operand 1324 states and 2187 transitions. Second operand has 4 states, 4 states have (on average 54.5) internal successors, (218), 4 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:51,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:37:51,901 INFO L93 Difference]: Finished difference Result 3552 states and 5868 transitions. [2023-11-23 21:37:51,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:37:51,902 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.5) internal successors, (218), 4 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 218 [2023-11-23 21:37:51,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:37:51,909 INFO L225 Difference]: With dead ends: 3552 [2023-11-23 21:37:51,909 INFO L226 Difference]: Without dead ends: 2423 [2023-11-23 21:37:51,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:37:51,913 INFO L413 NwaCegarLoop]: 2296 mSDtfsCounter, 1812 mSDsluCounter, 4270 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1812 SdHoareTripleChecker+Valid, 6566 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:37:51,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1812 Valid, 6566 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:37:51,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2023-11-23 21:37:51,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 1326. [2023-11-23 21:37:51,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1326 states, 1325 states have (on average 1.6520754716981132) internal successors, (2189), 1325 states have internal predecessors, (2189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:51,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 2189 transitions. [2023-11-23 21:37:51,970 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 2189 transitions. Word has length 218 [2023-11-23 21:37:51,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:37:51,971 INFO L495 AbstractCegarLoop]: Abstraction has 1326 states and 2189 transitions. [2023-11-23 21:37:51,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.5) internal successors, (218), 4 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:51,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 2189 transitions. [2023-11-23 21:37:51,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2023-11-23 21:37:51,975 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:37:51,976 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:51,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-23 21:37:51,976 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:37:51,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:51,977 INFO L85 PathProgramCache]: Analyzing trace with hash 139208026, now seen corresponding path program 1 times [2023-11-23 21:37:51,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:51,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140121032] [2023-11-23 21:37:51,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:51,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:52,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:52,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:52,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:52,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140121032] [2023-11-23 21:37:52,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140121032] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:37:52,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:37:52,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:37:52,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889482921] [2023-11-23 21:37:52,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:37:52,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:37:52,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:37:52,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:37:52,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:37:52,545 INFO L87 Difference]: Start difference. First operand 1326 states and 2189 transitions. Second operand has 4 states, 4 states have (on average 54.75) internal successors, (219), 4 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:52,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:37:52,654 INFO L93 Difference]: Finished difference Result 3555 states and 5869 transitions. [2023-11-23 21:37:52,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:37:52,655 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.75) internal successors, (219), 4 states have internal predecessors, (219), 0 states have call successors, (0), 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 219 [2023-11-23 21:37:52,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:37:52,662 INFO L225 Difference]: With dead ends: 3555 [2023-11-23 21:37:52,662 INFO L226 Difference]: Without dead ends: 2424 [2023-11-23 21:37:52,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:37:52,666 INFO L413 NwaCegarLoop]: 2286 mSDtfsCounter, 1807 mSDsluCounter, 4260 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1807 SdHoareTripleChecker+Valid, 6546 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:37:52,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1807 Valid, 6546 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:37:52,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2424 states. [2023-11-23 21:37:52,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2424 to 1331. [2023-11-23 21:37:52,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1331 states, 1330 states have (on average 1.651127819548872) internal successors, (2196), 1330 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:52,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 2196 transitions. [2023-11-23 21:37:52,732 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 2196 transitions. Word has length 219 [2023-11-23 21:37:52,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:37:52,733 INFO L495 AbstractCegarLoop]: Abstraction has 1331 states and 2196 transitions. [2023-11-23 21:37:52,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.75) internal successors, (219), 4 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:52,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 2196 transitions. [2023-11-23 21:37:52,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2023-11-23 21:37:52,737 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:37:52,738 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:52,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-23 21:37:52,738 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:37:52,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:52,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1552263602, now seen corresponding path program 1 times [2023-11-23 21:37:52,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:52,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039054478] [2023-11-23 21:37:52,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:52,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:52,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:53,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:53,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:53,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039054478] [2023-11-23 21:37:53,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039054478] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:37:53,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:37:53,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:37:53,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990545393] [2023-11-23 21:37:53,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:37:53,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:37:53,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:37:53,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:37:53,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:37:53,294 INFO L87 Difference]: Start difference. First operand 1331 states and 2196 transitions. Second operand has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:53,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:37:53,391 INFO L93 Difference]: Finished difference Result 3564 states and 5880 transitions. [2023-11-23 21:37:53,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:37:53,392 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 0 states have call successors, (0), 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 220 [2023-11-23 21:37:53,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:37:53,398 INFO L225 Difference]: With dead ends: 3564 [2023-11-23 21:37:53,398 INFO L226 Difference]: Without dead ends: 2428 [2023-11-23 21:37:53,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:37:53,403 INFO L413 NwaCegarLoop]: 2281 mSDtfsCounter, 1806 mSDsluCounter, 4255 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1806 SdHoareTripleChecker+Valid, 6536 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:37:53,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1806 Valid, 6536 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:37:53,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2023-11-23 21:37:53,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 1333. [2023-11-23 21:37:53,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1333 states, 1332 states have (on average 1.65015015015015) internal successors, (2198), 1332 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:53,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 2198 transitions. [2023-11-23 21:37:53,445 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 2198 transitions. Word has length 220 [2023-11-23 21:37:53,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:37:53,446 INFO L495 AbstractCegarLoop]: Abstraction has 1333 states and 2198 transitions. [2023-11-23 21:37:53,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:53,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 2198 transitions. [2023-11-23 21:37:53,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2023-11-23 21:37:53,450 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:37:53,451 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:53,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-23 21:37:53,451 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:37:53,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:53,452 INFO L85 PathProgramCache]: Analyzing trace with hash -910938624, now seen corresponding path program 1 times [2023-11-23 21:37:53,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:53,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309427661] [2023-11-23 21:37:53,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:53,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:53,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:53,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:53,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:53,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309427661] [2023-11-23 21:37:53,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309427661] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:37:53,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:37:53,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:37:53,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66999761] [2023-11-23 21:37:53,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:37:53,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:37:53,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:37:53,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:37:53,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:37:53,904 INFO L87 Difference]: Start difference. First operand 1333 states and 2198 transitions. Second operand has 4 states, 4 states have (on average 55.25) internal successors, (221), 4 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:53,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:37:53,985 INFO L93 Difference]: Finished difference Result 3563 states and 5875 transitions. [2023-11-23 21:37:53,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:37:53,986 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.25) internal successors, (221), 4 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 221 [2023-11-23 21:37:53,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:37:53,991 INFO L225 Difference]: With dead ends: 3563 [2023-11-23 21:37:53,991 INFO L226 Difference]: Without dead ends: 2425 [2023-11-23 21:37:53,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:37:53,994 INFO L413 NwaCegarLoop]: 2272 mSDtfsCounter, 1798 mSDsluCounter, 4244 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1798 SdHoareTripleChecker+Valid, 6516 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:37:53,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1798 Valid, 6516 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:37:53,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2023-11-23 21:37:54,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 1335. [2023-11-23 21:37:54,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 1334 states have (on average 1.6491754122938531) internal successors, (2200), 1334 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:54,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 2200 transitions. [2023-11-23 21:37:54,033 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 2200 transitions. Word has length 221 [2023-11-23 21:37:54,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:37:54,034 INFO L495 AbstractCegarLoop]: Abstraction has 1335 states and 2200 transitions. [2023-11-23 21:37:54,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.25) internal successors, (221), 4 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:54,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 2200 transitions. [2023-11-23 21:37:54,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2023-11-23 21:37:54,038 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:37:54,038 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:54,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-23 21:37:54,038 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:37:54,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:54,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1042478068, now seen corresponding path program 1 times [2023-11-23 21:37:54,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:54,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054661285] [2023-11-23 21:37:54,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:54,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:54,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:54,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:54,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:54,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054661285] [2023-11-23 21:37:54,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054661285] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:37:54,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:37:54,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:37:54,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843766897] [2023-11-23 21:37:54,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:37:54,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:37:54,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:37:54,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:37:54,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:37:54,470 INFO L87 Difference]: Start difference. First operand 1335 states and 2200 transitions. Second operand has 4 states, 4 states have (on average 55.5) internal successors, (222), 4 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:54,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:37:54,555 INFO L93 Difference]: Finished difference Result 3573 states and 5887 transitions. [2023-11-23 21:37:54,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:37:54,555 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.5) internal successors, (222), 4 states have internal predecessors, (222), 0 states have call successors, (0), 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 222 [2023-11-23 21:37:54,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:37:54,560 INFO L225 Difference]: With dead ends: 3573 [2023-11-23 21:37:54,561 INFO L226 Difference]: Without dead ends: 2433 [2023-11-23 21:37:54,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:37:54,564 INFO L413 NwaCegarLoop]: 2271 mSDtfsCounter, 1800 mSDsluCounter, 4245 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1800 SdHoareTripleChecker+Valid, 6516 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:37:54,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1800 Valid, 6516 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:37:54,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2433 states. [2023-11-23 21:37:54,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2433 to 1338. [2023-11-23 21:37:54,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1337 states have (on average 1.649214659685864) internal successors, (2205), 1337 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:54,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 2205 transitions. [2023-11-23 21:37:54,602 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 2205 transitions. Word has length 222 [2023-11-23 21:37:54,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:37:54,603 INFO L495 AbstractCegarLoop]: Abstraction has 1338 states and 2205 transitions. [2023-11-23 21:37:54,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.5) internal successors, (222), 4 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:54,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 2205 transitions. [2023-11-23 21:37:54,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2023-11-23 21:37:54,608 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:37:54,609 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:54,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-23 21:37:54,609 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:37:54,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:54,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1872059492, now seen corresponding path program 1 times [2023-11-23 21:37:54,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:54,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539914391] [2023-11-23 21:37:54,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:54,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:54,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:55,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:55,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:55,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539914391] [2023-11-23 21:37:55,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539914391] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:37:55,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:37:55,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:37:55,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651916008] [2023-11-23 21:37:55,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:37:55,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:37:55,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:37:55,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:37:55,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:37:55,029 INFO L87 Difference]: Start difference. First operand 1338 states and 2205 transitions. Second operand has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:55,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:37:55,100 INFO L93 Difference]: Finished difference Result 3572 states and 5886 transitions. [2023-11-23 21:37:55,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:37:55,101 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 0 states have call successors, (0), 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 223 [2023-11-23 21:37:55,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:37:55,107 INFO L225 Difference]: With dead ends: 3572 [2023-11-23 21:37:55,107 INFO L226 Difference]: Without dead ends: 2429 [2023-11-23 21:37:55,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:37:55,110 INFO L413 NwaCegarLoop]: 2262 mSDtfsCounter, 1795 mSDsluCounter, 4234 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1795 SdHoareTripleChecker+Valid, 6496 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:37:55,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1795 Valid, 6496 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:37:55,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2429 states. [2023-11-23 21:37:55,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2429 to 1340. [2023-11-23 21:37:55,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1340 states, 1339 states have (on average 1.6482449589245707) internal successors, (2207), 1339 states have internal predecessors, (2207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:55,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 2207 transitions. [2023-11-23 21:37:55,158 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 2207 transitions. Word has length 223 [2023-11-23 21:37:55,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:37:55,159 INFO L495 AbstractCegarLoop]: Abstraction has 1340 states and 2207 transitions. [2023-11-23 21:37:55,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:55,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 2207 transitions. [2023-11-23 21:37:55,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2023-11-23 21:37:55,163 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:37:55,163 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:55,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-23 21:37:55,163 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:37:55,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:55,164 INFO L85 PathProgramCache]: Analyzing trace with hash 291004452, now seen corresponding path program 1 times [2023-11-23 21:37:55,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:55,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515670347] [2023-11-23 21:37:55,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:55,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:55,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:55,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:55,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:55,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515670347] [2023-11-23 21:37:55,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515670347] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:37:55,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:37:55,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:37:55,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504168395] [2023-11-23 21:37:55,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:37:55,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:37:55,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:37:55,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:37:55,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:37:55,709 INFO L87 Difference]: Start difference. First operand 1340 states and 2207 transitions. Second operand has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:55,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:37:55,793 INFO L93 Difference]: Finished difference Result 3582 states and 5898 transitions. [2023-11-23 21:37:55,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:37:55,794 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 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 224 [2023-11-23 21:37:55,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:37:55,800 INFO L225 Difference]: With dead ends: 3582 [2023-11-23 21:37:55,800 INFO L226 Difference]: Without dead ends: 2437 [2023-11-23 21:37:55,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:37:55,803 INFO L413 NwaCegarLoop]: 2261 mSDtfsCounter, 1797 mSDsluCounter, 4235 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1797 SdHoareTripleChecker+Valid, 6496 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:37:55,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1797 Valid, 6496 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:37:55,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2437 states. [2023-11-23 21:37:55,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2437 to 1343. [2023-11-23 21:37:55,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1343 states, 1342 states have (on average 1.6482861400894189) internal successors, (2212), 1342 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:55,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 2212 transitions. [2023-11-23 21:37:55,841 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 2212 transitions. Word has length 224 [2023-11-23 21:37:55,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:37:55,841 INFO L495 AbstractCegarLoop]: Abstraction has 1343 states and 2212 transitions. [2023-11-23 21:37:55,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:55,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 2212 transitions. [2023-11-23 21:37:55,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2023-11-23 21:37:55,845 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:37:55,846 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:55,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-23 21:37:55,847 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:37:55,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:55,847 INFO L85 PathProgramCache]: Analyzing trace with hash -355464950, now seen corresponding path program 1 times [2023-11-23 21:37:55,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:55,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718252250] [2023-11-23 21:37:55,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:55,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:55,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:56,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:56,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:56,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718252250] [2023-11-23 21:37:56,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718252250] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:37:56,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:37:56,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:37:56,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103618270] [2023-11-23 21:37:56,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:37:56,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:37:56,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:37:56,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:37:56,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:37:56,335 INFO L87 Difference]: Start difference. First operand 1343 states and 2212 transitions. Second operand has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:56,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:37:56,424 INFO L93 Difference]: Finished difference Result 3585 states and 5903 transitions. [2023-11-23 21:37:56,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:37:56,424 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 0 states have call successors, (0), 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 225 [2023-11-23 21:37:56,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:37:56,430 INFO L225 Difference]: With dead ends: 3585 [2023-11-23 21:37:56,430 INFO L226 Difference]: Without dead ends: 2437 [2023-11-23 21:37:56,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:37:56,434 INFO L413 NwaCegarLoop]: 2256 mSDtfsCounter, 1797 mSDsluCounter, 4230 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1797 SdHoareTripleChecker+Valid, 6486 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:37:56,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1797 Valid, 6486 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:37:56,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2437 states. [2023-11-23 21:37:56,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2437 to 1345. [2023-11-23 21:37:56,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1344 states have (on average 1.6473214285714286) internal successors, (2214), 1344 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:56,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 2214 transitions. [2023-11-23 21:37:56,475 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 2214 transitions. Word has length 225 [2023-11-23 21:37:56,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:37:56,476 INFO L495 AbstractCegarLoop]: Abstraction has 1345 states and 2214 transitions. [2023-11-23 21:37:56,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:56,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 2214 transitions. [2023-11-23 21:37:56,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2023-11-23 21:37:56,478 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:37:56,479 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:56,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-23 21:37:56,480 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:37:56,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:56,480 INFO L85 PathProgramCache]: Analyzing trace with hash -282968450, now seen corresponding path program 1 times [2023-11-23 21:37:56,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:56,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382591598] [2023-11-23 21:37:56,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:56,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:56,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:56,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:56,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:56,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382591598] [2023-11-23 21:37:56,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382591598] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:37:56,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:37:56,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:37:56,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684656606] [2023-11-23 21:37:56,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:37:56,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:37:56,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:37:56,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:37:56,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:37:56,987 INFO L87 Difference]: Start difference. First operand 1345 states and 2214 transitions. Second operand has 4 states, 4 states have (on average 56.5) internal successors, (226), 4 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:57,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:37:57,153 INFO L93 Difference]: Finished difference Result 3588 states and 5904 transitions. [2023-11-23 21:37:57,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:37:57,154 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.5) internal successors, (226), 4 states have internal predecessors, (226), 0 states have call successors, (0), 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 226 [2023-11-23 21:37:57,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:37:57,160 INFO L225 Difference]: With dead ends: 3588 [2023-11-23 21:37:57,161 INFO L226 Difference]: Without dead ends: 2438 [2023-11-23 21:37:57,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:37:57,164 INFO L413 NwaCegarLoop]: 2246 mSDtfsCounter, 1792 mSDsluCounter, 4220 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1792 SdHoareTripleChecker+Valid, 6466 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:37:57,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1792 Valid, 6466 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:37:57,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2438 states. [2023-11-23 21:37:57,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2438 to 1350. [2023-11-23 21:37:57,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 1.6464047442550036) internal successors, (2221), 1349 states have internal predecessors, (2221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:57,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 2221 transitions. [2023-11-23 21:37:57,208 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 2221 transitions. Word has length 226 [2023-11-23 21:37:57,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:37:57,209 INFO L495 AbstractCegarLoop]: Abstraction has 1350 states and 2221 transitions. [2023-11-23 21:37:57,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.5) internal successors, (226), 4 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:57,209 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 2221 transitions. [2023-11-23 21:37:57,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2023-11-23 21:37:57,212 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:37:57,212 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:57,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-23 21:37:57,213 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:37:57,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:57,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1853192618, now seen corresponding path program 1 times [2023-11-23 21:37:57,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:57,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414180674] [2023-11-23 21:37:57,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:57,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:57,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:57,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:57,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:57,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414180674] [2023-11-23 21:37:57,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414180674] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:37:57,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:37:57,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:37:57,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608928351] [2023-11-23 21:37:57,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:37:57,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:37:57,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:37:57,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:37:57,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:37:57,783 INFO L87 Difference]: Start difference. First operand 1350 states and 2221 transitions. Second operand has 4 states, 4 states have (on average 56.75) internal successors, (227), 4 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:57,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:37:57,866 INFO L93 Difference]: Finished difference Result 3593 states and 5909 transitions. [2023-11-23 21:37:57,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:37:57,867 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 4 states have internal predecessors, (227), 0 states have call successors, (0), 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 227 [2023-11-23 21:37:57,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:37:57,872 INFO L225 Difference]: With dead ends: 3593 [2023-11-23 21:37:57,872 INFO L226 Difference]: Without dead ends: 2438 [2023-11-23 21:37:57,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:37:57,877 INFO L413 NwaCegarLoop]: 2237 mSDtfsCounter, 1786 mSDsluCounter, 4209 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1786 SdHoareTripleChecker+Valid, 6446 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:37:57,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1786 Valid, 6446 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:37:57,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2438 states. [2023-11-23 21:37:57,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2438 to 1352. [2023-11-23 21:37:57,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 1.6454478164322723) internal successors, (2223), 1351 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:57,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 2223 transitions. [2023-11-23 21:37:57,915 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 2223 transitions. Word has length 227 [2023-11-23 21:37:57,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:37:57,915 INFO L495 AbstractCegarLoop]: Abstraction has 1352 states and 2223 transitions. [2023-11-23 21:37:57,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 4 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:57,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 2223 transitions. [2023-11-23 21:37:57,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2023-11-23 21:37:57,918 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:37:57,918 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:57,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-23 21:37:57,919 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:37:57,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:57,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1613119208, now seen corresponding path program 1 times [2023-11-23 21:37:57,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:57,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762336555] [2023-11-23 21:37:57,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:57,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:58,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:58,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:58,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:58,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762336555] [2023-11-23 21:37:58,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762336555] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:37:58,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:37:58,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:37:58,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172480942] [2023-11-23 21:37:58,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:37:58,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:37:58,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:37:58,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:37:58,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:37:58,403 INFO L87 Difference]: Start difference. First operand 1352 states and 2223 transitions. Second operand has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:58,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:37:58,488 INFO L93 Difference]: Finished difference Result 3603 states and 5921 transitions. [2023-11-23 21:37:58,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:37:58,489 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 0 states have call successors, (0), 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 228 [2023-11-23 21:37:58,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:37:58,495 INFO L225 Difference]: With dead ends: 3603 [2023-11-23 21:37:58,495 INFO L226 Difference]: Without dead ends: 2446 [2023-11-23 21:37:58,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:37:58,498 INFO L413 NwaCegarLoop]: 2236 mSDtfsCounter, 1788 mSDsluCounter, 4210 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1788 SdHoareTripleChecker+Valid, 6446 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:37:58,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1788 Valid, 6446 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:37:58,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2023-11-23 21:37:58,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 1355. [2023-11-23 21:37:58,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1355 states, 1354 states have (on average 1.6454948301329395) internal successors, (2228), 1354 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:58,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 2228 transitions. [2023-11-23 21:37:58,533 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 2228 transitions. Word has length 228 [2023-11-23 21:37:58,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:37:58,534 INFO L495 AbstractCegarLoop]: Abstraction has 1355 states and 2228 transitions. [2023-11-23 21:37:58,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:58,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 2228 transitions. [2023-11-23 21:37:58,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2023-11-23 21:37:58,536 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:37:58,537 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:58,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-23 21:37:58,537 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:37:58,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:58,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1856501948, now seen corresponding path program 1 times [2023-11-23 21:37:58,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:58,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261345086] [2023-11-23 21:37:58,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:58,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:58,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:58,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:58,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:58,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261345086] [2023-11-23 21:37:58,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261345086] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:37:58,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:37:58,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:37:58,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390472849] [2023-11-23 21:37:58,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:37:58,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:37:58,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:37:58,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:37:58,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:37:58,969 INFO L87 Difference]: Start difference. First operand 1355 states and 2228 transitions. Second operand has 4 states, 4 states have (on average 57.25) internal successors, (229), 4 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:59,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:37:59,044 INFO L93 Difference]: Finished difference Result 3602 states and 5920 transitions. [2023-11-23 21:37:59,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:37:59,044 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.25) internal successors, (229), 4 states have internal predecessors, (229), 0 states have call successors, (0), 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 229 [2023-11-23 21:37:59,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:37:59,050 INFO L225 Difference]: With dead ends: 3602 [2023-11-23 21:37:59,050 INFO L226 Difference]: Without dead ends: 2442 [2023-11-23 21:37:59,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:37:59,054 INFO L413 NwaCegarLoop]: 2227 mSDtfsCounter, 1783 mSDsluCounter, 4199 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1783 SdHoareTripleChecker+Valid, 6426 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:37:59,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1783 Valid, 6426 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:37:59,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2023-11-23 21:37:59,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 1357. [2023-11-23 21:37:59,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1357 states, 1356 states have (on average 1.6445427728613569) internal successors, (2230), 1356 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:59,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1357 states to 1357 states and 2230 transitions. [2023-11-23 21:37:59,135 INFO L78 Accepts]: Start accepts. Automaton has 1357 states and 2230 transitions. Word has length 229 [2023-11-23 21:37:59,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:37:59,136 INFO L495 AbstractCegarLoop]: Abstraction has 1357 states and 2230 transitions. [2023-11-23 21:37:59,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.25) internal successors, (229), 4 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:59,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1357 states and 2230 transitions. [2023-11-23 21:37:59,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2023-11-23 21:37:59,139 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:37:59,139 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:59,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-23 21:37:59,139 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:37:59,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:59,140 INFO L85 PathProgramCache]: Analyzing trace with hash -454752204, now seen corresponding path program 1 times [2023-11-23 21:37:59,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:59,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742843362] [2023-11-23 21:37:59,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:59,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:59,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:59,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:59,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:59,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742843362] [2023-11-23 21:37:59,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742843362] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:37:59,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:37:59,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:37:59,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306299729] [2023-11-23 21:37:59,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:37:59,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:37:59,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:37:59,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:37:59,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:37:59,647 INFO L87 Difference]: Start difference. First operand 1357 states and 2230 transitions. Second operand has 5 states, 5 states have (on average 46.0) internal successors, (230), 5 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:59,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:37:59,763 INFO L93 Difference]: Finished difference Result 3612 states and 5932 transitions. [2023-11-23 21:37:59,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:37:59,764 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 46.0) internal successors, (230), 5 states have internal predecessors, (230), 0 states have call successors, (0), 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 230 [2023-11-23 21:37:59,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:37:59,769 INFO L225 Difference]: With dead ends: 3612 [2023-11-23 21:37:59,769 INFO L226 Difference]: Without dead ends: 2450 [2023-11-23 21:37:59,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:37:59,773 INFO L413 NwaCegarLoop]: 2225 mSDtfsCounter, 1786 mSDsluCounter, 6417 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1786 SdHoareTripleChecker+Valid, 8642 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:37:59,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1786 Valid, 8642 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:37:59,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2450 states. [2023-11-23 21:37:59,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2450 to 1360. [2023-11-23 21:37:59,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1359 states have (on average 1.6445916114790287) internal successors, (2235), 1359 states have internal predecessors, (2235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:59,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 2235 transitions. [2023-11-23 21:37:59,806 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 2235 transitions. Word has length 230 [2023-11-23 21:37:59,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:37:59,807 INFO L495 AbstractCegarLoop]: Abstraction has 1360 states and 2235 transitions. [2023-11-23 21:37:59,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.0) internal successors, (230), 5 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:59,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 2235 transitions. [2023-11-23 21:37:59,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2023-11-23 21:37:59,809 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:37:59,810 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:59,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-23 21:37:59,810 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:37:59,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:59,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1063525468, now seen corresponding path program 1 times [2023-11-23 21:37:59,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:59,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242428029] [2023-11-23 21:37:59,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:59,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:59,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:38:00,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:38:00,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:38:00,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242428029] [2023-11-23 21:38:00,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242428029] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:38:00,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:38:00,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:38:00,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362435304] [2023-11-23 21:38:00,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:38:00,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:38:00,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:38:00,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:38:00,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:38:00,703 INFO L87 Difference]: Start difference. First operand 1360 states and 2235 transitions. Second operand has 6 states, 6 states have (on average 38.5) internal successors, (231), 5 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:00,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:38:00,843 INFO L93 Difference]: Finished difference Result 3648 states and 5993 transitions. [2023-11-23 21:38:00,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:38:00,843 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 38.5) internal successors, (231), 5 states have internal predecessors, (231), 0 states have call successors, (0), 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 231 [2023-11-23 21:38:00,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:38:00,849 INFO L225 Difference]: With dead ends: 3648 [2023-11-23 21:38:00,849 INFO L226 Difference]: Without dead ends: 2483 [2023-11-23 21:38:00,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:38:00,852 INFO L413 NwaCegarLoop]: 2218 mSDtfsCounter, 9128 mSDsluCounter, 3958 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9128 SdHoareTripleChecker+Valid, 6176 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:38:00,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9128 Valid, 6176 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:38:00,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2483 states. [2023-11-23 21:38:00,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2483 to 1396. [2023-11-23 21:38:00,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1396 states, 1395 states have (on average 1.6444444444444444) internal successors, (2294), 1395 states have internal predecessors, (2294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:00,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1396 states to 1396 states and 2294 transitions. [2023-11-23 21:38:00,889 INFO L78 Accepts]: Start accepts. Automaton has 1396 states and 2294 transitions. Word has length 231 [2023-11-23 21:38:00,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:38:00,890 INFO L495 AbstractCegarLoop]: Abstraction has 1396 states and 2294 transitions. [2023-11-23 21:38:00,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 38.5) internal successors, (231), 5 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:00,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1396 states and 2294 transitions. [2023-11-23 21:38:00,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 971 [2023-11-23 21:38:00,906 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:38:00,907 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:38:00,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-11-23 21:38:00,908 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:38:00,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:38:00,909 INFO L85 PathProgramCache]: Analyzing trace with hash -2114796058, now seen corresponding path program 1 times [2023-11-23 21:38:00,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:38:00,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679726520] [2023-11-23 21:38:00,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:38:00,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:38:01,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat