./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem16_label31.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_defa07d0-5ed6-491f-ac44-28f14b39c05d/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_defa07d0-5ed6-491f-ac44-28f14b39c05d/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_defa07d0-5ed6-491f-ac44-28f14b39c05d/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_defa07d0-5ed6-491f-ac44-28f14b39c05d/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem16_label31.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_defa07d0-5ed6-491f-ac44-28f14b39c05d/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_defa07d0-5ed6-491f-ac44-28f14b39c05d/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 030ee26298bd2420f8f616fb27ee842ae3e86a11841315b0a84bebf89a7dcbb5 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:58:33,707 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:58:33,835 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_defa07d0-5ed6-491f-ac44-28f14b39c05d/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:58:33,845 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:58:33,846 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:58:33,888 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:58:33,889 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:58:33,890 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:58:33,891 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:58:33,898 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:58:33,898 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:58:33,900 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:58:33,901 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:58:33,903 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:58:33,903 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:58:33,904 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:58:33,904 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:58:33,905 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:58:33,905 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:58:33,906 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:58:33,906 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:58:33,907 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:58:33,907 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:58:33,908 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:58:33,908 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:58:33,909 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:58:33,909 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:58:33,910 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:58:33,910 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:58:33,911 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:58:33,912 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:58:33,912 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:58:33,913 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:58:33,913 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:58:33,913 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:58:33,913 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:58:33,913 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:58:33,913 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:58:33,914 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:58:33,914 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:58:33,914 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:58:33,916 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:58:33,916 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_defa07d0-5ed6-491f-ac44-28f14b39c05d/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_defa07d0-5ed6-491f-ac44-28f14b39c05d/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 030ee26298bd2420f8f616fb27ee842ae3e86a11841315b0a84bebf89a7dcbb5 [2023-11-26 11:58:34,309 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:58:34,342 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:58:34,344 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:58:34,346 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:58:34,347 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:58:34,348 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_defa07d0-5ed6-491f-ac44-28f14b39c05d/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/eca-rers2012/Problem16_label31.c [2023-11-26 11:58:37,664 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:58:38,085 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:58:38,087 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_defa07d0-5ed6-491f-ac44-28f14b39c05d/sv-benchmarks/c/eca-rers2012/Problem16_label31.c [2023-11-26 11:58:38,112 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_defa07d0-5ed6-491f-ac44-28f14b39c05d/bin/uautomizer-verify-VRDe98Ueme/data/02bb361cf/456c40b0ad3841339c9ebb5f5200a638/FLAGd8b455729 [2023-11-26 11:58:38,130 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_defa07d0-5ed6-491f-ac44-28f14b39c05d/bin/uautomizer-verify-VRDe98Ueme/data/02bb361cf/456c40b0ad3841339c9ebb5f5200a638 [2023-11-26 11:58:38,133 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:58:38,135 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:58:38,136 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:58:38,136 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:58:38,142 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:58:38,143 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:58:38" (1/1) ... [2023-11-26 11:58:38,144 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ef08e53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:38, skipping insertion in model container [2023-11-26 11:58:38,145 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:58:38" (1/1) ... [2023-11-26 11:58:38,234 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:58:38,417 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_defa07d0-5ed6-491f-ac44-28f14b39c05d/sv-benchmarks/c/eca-rers2012/Problem16_label31.c[1200,1213] [2023-11-26 11:58:39,081 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:58:39,097 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:58:39,115 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_defa07d0-5ed6-491f-ac44-28f14b39c05d/sv-benchmarks/c/eca-rers2012/Problem16_label31.c[1200,1213] [2023-11-26 11:58:39,361 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:58:39,380 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:58:39,381 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:39 WrapperNode [2023-11-26 11:58:39,381 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:58:39,383 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:58:39,383 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:58:39,384 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:58:39,391 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:39" (1/1) ... [2023-11-26 11:58:39,441 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:39" (1/1) ... [2023-11-26 11:58:39,587 INFO L138 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1769 [2023-11-26 11:58:39,587 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:58:39,588 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:58:39,588 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:58:39,588 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:58:39,602 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:39" (1/1) ... [2023-11-26 11:58:39,603 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:39" (1/1) ... [2023-11-26 11:58:39,618 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:39" (1/1) ... [2023-11-26 11:58:39,746 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 11:58:39,747 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:39" (1/1) ... [2023-11-26 11:58:39,750 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:39" (1/1) ... [2023-11-26 11:58:39,825 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:39" (1/1) ... [2023-11-26 11:58:39,857 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:39" (1/1) ... [2023-11-26 11:58:39,871 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:39" (1/1) ... [2023-11-26 11:58:39,888 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:39" (1/1) ... [2023-11-26 11:58:39,915 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:58:39,916 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:58:39,916 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:58:39,917 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:58:39,917 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:39" (1/1) ... [2023-11-26 11:58:39,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:58:39,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_defa07d0-5ed6-491f-ac44-28f14b39c05d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:58:39,958 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_defa07d0-5ed6-491f-ac44-28f14b39c05d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:58:39,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_defa07d0-5ed6-491f-ac44-28f14b39c05d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:58:39,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:58:39,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:58:39,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:58:39,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:58:40,075 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:58:40,078 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:58:42,765 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:58:42,817 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:58:42,817 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:58:42,817 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:58:42 BoogieIcfgContainer [2023-11-26 11:58:42,818 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:58:42,820 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:58:42,821 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:58:42,824 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:58:42,824 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:58:38" (1/3) ... [2023-11-26 11:58:42,825 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a17b47d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:58:42, skipping insertion in model container [2023-11-26 11:58:42,825 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:39" (2/3) ... [2023-11-26 11:58:42,825 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a17b47d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:58:42, skipping insertion in model container [2023-11-26 11:58:42,826 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:58:42" (3/3) ... [2023-11-26 11:58:42,827 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label31.c [2023-11-26 11:58:42,848 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:58:42,848 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:58:42,910 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:58:42,917 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;@2966561d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:58:42,917 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:58:42,923 INFO L276 IsEmpty]: Start isEmpty. Operand has 334 states, 332 states have (on average 1.9909638554216869) internal successors, (661), 333 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:42,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-26 11:58:42,930 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:58:42,931 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:58:42,932 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:58:42,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:42,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1475555868, now seen corresponding path program 1 times [2023-11-26 11:58:42,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:42,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516127235] [2023-11-26 11:58:42,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:42,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:43,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:43,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:58:43,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:43,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516127235] [2023-11-26 11:58:43,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516127235] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:58:43,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:58:43,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:58:43,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137737334] [2023-11-26 11:58:43,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:58:43,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:58:43,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:43,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:58:43,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:58:43,141 INFO L87 Difference]: Start difference. First operand has 334 states, 332 states have (on average 1.9909638554216869) internal successors, (661), 333 states have internal predecessors, (661), 0 states have call successors, (0), 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 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:43,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:58:43,217 INFO L93 Difference]: Finished difference Result 667 states and 1321 transitions. [2023-11-26 11:58:43,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:58:43,222 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2023-11-26 11:58:43,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:58:43,241 INFO L225 Difference]: With dead ends: 667 [2023-11-26 11:58:43,241 INFO L226 Difference]: Without dead ends: 332 [2023-11-26 11:58:43,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:58:43,249 INFO L413 NwaCegarLoop]: 596 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:58:43,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 596 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:58:43,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2023-11-26 11:58:43,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 332. [2023-11-26 11:58:43,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 1.8006042296072509) internal successors, (596), 331 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:43,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 596 transitions. [2023-11-26 11:58:43,335 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 596 transitions. Word has length 7 [2023-11-26 11:58:43,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:58:43,336 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 596 transitions. [2023-11-26 11:58:43,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:43,336 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 596 transitions. [2023-11-26 11:58:43,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-26 11:58:43,337 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:58:43,337 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:58:43,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:58:43,338 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:58:43,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:43,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1477291434, now seen corresponding path program 1 times [2023-11-26 11:58:43,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:43,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422899853] [2023-11-26 11:58:43,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:43,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:43,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:43,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:58:43,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:43,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422899853] [2023-11-26 11:58:43,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422899853] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:58:43,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:58:43,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:58:43,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324379479] [2023-11-26 11:58:43,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:58:43,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:58:43,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:43,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:58:43,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:58:43,415 INFO L87 Difference]: Start difference. First operand 332 states and 596 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:45,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:58:45,482 INFO L93 Difference]: Finished difference Result 992 states and 1785 transitions. [2023-11-26 11:58:45,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:58:45,489 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2023-11-26 11:58:45,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:58:45,494 INFO L225 Difference]: With dead ends: 992 [2023-11-26 11:58:45,500 INFO L226 Difference]: Without dead ends: 661 [2023-11-26 11:58:45,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:58:45,506 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 363 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 1195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:58:45,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 199 Invalid, 1195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 805 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-26 11:58:45,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2023-11-26 11:58:45,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 661. [2023-11-26 11:58:45,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 1.5196969696969698) internal successors, (1003), 660 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:45,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 1003 transitions. [2023-11-26 11:58:45,552 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 1003 transitions. Word has length 7 [2023-11-26 11:58:45,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:58:45,553 INFO L495 AbstractCegarLoop]: Abstraction has 661 states and 1003 transitions. [2023-11-26 11:58:45,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:45,553 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 1003 transitions. [2023-11-26 11:58:45,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-26 11:58:45,556 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:58:45,557 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-26 11:58:45,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:58:45,557 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:58:45,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:45,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1984152592, now seen corresponding path program 1 times [2023-11-26 11:58:45,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:45,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199274907] [2023-11-26 11:58:45,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:45,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:45,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:45,946 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:58:45,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:45,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199274907] [2023-11-26 11:58:45,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199274907] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:58:45,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:58:45,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:58:45,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344733108] [2023-11-26 11:58:45,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:58:45,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:58:45,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:45,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:58:45,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:58:45,950 INFO L87 Difference]: Start difference. First operand 661 states and 1003 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:48,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:58:48,164 INFO L93 Difference]: Finished difference Result 1979 states and 3006 transitions. [2023-11-26 11:58:48,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:58:48,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2023-11-26 11:58:48,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:58:48,173 INFO L225 Difference]: With dead ends: 1979 [2023-11-26 11:58:48,173 INFO L226 Difference]: Without dead ends: 1319 [2023-11-26 11:58:48,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:58:48,176 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 269 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 1261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:58:48,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 214 Invalid, 1261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-26 11:58:48,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2023-11-26 11:58:48,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 1319. [2023-11-26 11:58:48,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1319 states, 1318 states have (on average 1.456752655538695) internal successors, (1920), 1318 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:48,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1319 states to 1319 states and 1920 transitions. [2023-11-26 11:58:48,225 INFO L78 Accepts]: Start accepts. Automaton has 1319 states and 1920 transitions. Word has length 75 [2023-11-26 11:58:48,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:58:48,226 INFO L495 AbstractCegarLoop]: Abstraction has 1319 states and 1920 transitions. [2023-11-26 11:58:48,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:48,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states and 1920 transitions. [2023-11-26 11:58:48,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-26 11:58:48,230 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:58:48,230 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-26 11:58:48,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:58:48,230 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:58:48,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:48,231 INFO L85 PathProgramCache]: Analyzing trace with hash -556046575, now seen corresponding path program 1 times [2023-11-26 11:58:48,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:48,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741977738] [2023-11-26 11:58:48,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:48,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:48,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:48,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:58:48,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:48,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741977738] [2023-11-26 11:58:48,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741977738] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:58:48,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:58:48,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:58:48,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753886732] [2023-11-26 11:58:48,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:58:48,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:58:48,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:48,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:58:48,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:58:48,362 INFO L87 Difference]: Start difference. First operand 1319 states and 1920 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:50,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:58:50,161 INFO L93 Difference]: Finished difference Result 3953 states and 5757 transitions. [2023-11-26 11:58:50,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:58:50,162 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 0 states have call successors, (0), 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 86 [2023-11-26 11:58:50,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:58:50,180 INFO L225 Difference]: With dead ends: 3953 [2023-11-26 11:58:50,181 INFO L226 Difference]: Without dead ends: 2635 [2023-11-26 11:58:50,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:58:50,184 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 369 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-26 11:58:50,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 153 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-26 11:58:50,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2023-11-26 11:58:50,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 2635. [2023-11-26 11:58:50,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2635 states, 2634 states have (on average 1.3249810174639332) internal successors, (3490), 2634 states have internal predecessors, (3490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:50,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2635 states to 2635 states and 3490 transitions. [2023-11-26 11:58:50,259 INFO L78 Accepts]: Start accepts. Automaton has 2635 states and 3490 transitions. Word has length 86 [2023-11-26 11:58:50,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:58:50,261 INFO L495 AbstractCegarLoop]: Abstraction has 2635 states and 3490 transitions. [2023-11-26 11:58:50,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:50,262 INFO L276 IsEmpty]: Start isEmpty. Operand 2635 states and 3490 transitions. [2023-11-26 11:58:50,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-26 11:58:50,269 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:58:50,271 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:58:50,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 11:58:50,271 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:58:50,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:50,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1628190833, now seen corresponding path program 1 times [2023-11-26 11:58:50,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:50,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130901684] [2023-11-26 11:58:50,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:50,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:50,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:50,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:58:50,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:50,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130901684] [2023-11-26 11:58:50,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130901684] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:58:50,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:58:50,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:58:50,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417024143] [2023-11-26 11:58:50,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:58:50,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:58:50,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:50,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:58:50,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:58:50,505 INFO L87 Difference]: Start difference. First operand 2635 states and 3490 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:52,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:58:52,277 INFO L93 Difference]: Finished difference Result 6585 states and 8549 transitions. [2023-11-26 11:58:52,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:58:52,278 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 0 states have call successors, (0), 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 138 [2023-11-26 11:58:52,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:58:52,302 INFO L225 Difference]: With dead ends: 6585 [2023-11-26 11:58:52,303 INFO L226 Difference]: Without dead ends: 3951 [2023-11-26 11:58:52,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:58:52,311 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 278 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 1148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-26 11:58:52,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 81 Invalid, 1148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-26 11:58:52,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3951 states. [2023-11-26 11:58:52,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3951 to 3951. [2023-11-26 11:58:52,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3951 states, 3950 states have (on average 1.2172151898734178) internal successors, (4808), 3950 states have internal predecessors, (4808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:52,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3951 states to 3951 states and 4808 transitions. [2023-11-26 11:58:52,420 INFO L78 Accepts]: Start accepts. Automaton has 3951 states and 4808 transitions. Word has length 138 [2023-11-26 11:58:52,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:58:52,421 INFO L495 AbstractCegarLoop]: Abstraction has 3951 states and 4808 transitions. [2023-11-26 11:58:52,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:52,422 INFO L276 IsEmpty]: Start isEmpty. Operand 3951 states and 4808 transitions. [2023-11-26 11:58:52,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2023-11-26 11:58:52,426 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:58:52,426 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-26 11:58:52,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 11:58:52,427 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:58:52,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:52,428 INFO L85 PathProgramCache]: Analyzing trace with hash 622508171, now seen corresponding path program 1 times [2023-11-26 11:58:52,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:52,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807044236] [2023-11-26 11:58:52,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:52,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:52,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:52,828 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:58:52,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:52,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807044236] [2023-11-26 11:58:52,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807044236] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:58:52,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:58:52,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:58:52,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354242289] [2023-11-26 11:58:52,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:58:52,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:58:52,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:52,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:58:52,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:58:52,836 INFO L87 Difference]: Start difference. First operand 3951 states and 4808 transitions. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:54,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:58:54,842 INFO L93 Difference]: Finished difference Result 9546 states and 11835 transitions. [2023-11-26 11:58:54,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:58:54,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 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 242 [2023-11-26 11:58:54,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:58:54,874 INFO L225 Difference]: With dead ends: 9546 [2023-11-26 11:58:54,875 INFO L226 Difference]: Without dead ends: 5596 [2023-11-26 11:58:54,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:58:54,881 INFO L413 NwaCegarLoop]: 587 mSDtfsCounter, 324 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 1229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-26 11:58:54,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 592 Invalid, 1229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 1012 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-26 11:58:54,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5596 states. [2023-11-26 11:58:55,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5596 to 5596. [2023-11-26 11:58:55,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5596 states, 5595 states have (on average 1.1801608579088472) internal successors, (6603), 5595 states have internal predecessors, (6603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:55,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5596 states to 5596 states and 6603 transitions. [2023-11-26 11:58:55,053 INFO L78 Accepts]: Start accepts. Automaton has 5596 states and 6603 transitions. Word has length 242 [2023-11-26 11:58:55,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:58:55,054 INFO L495 AbstractCegarLoop]: Abstraction has 5596 states and 6603 transitions. [2023-11-26 11:58:55,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:55,055 INFO L276 IsEmpty]: Start isEmpty. Operand 5596 states and 6603 transitions. [2023-11-26 11:58:55,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2023-11-26 11:58:55,058 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:58:55,059 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-26 11:58:55,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 11:58:55,059 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:58:55,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:55,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1879272178, now seen corresponding path program 1 times [2023-11-26 11:58:55,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:55,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729273013] [2023-11-26 11:58:55,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:55,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:55,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:55,735 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:58:55,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:55,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729273013] [2023-11-26 11:58:55,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729273013] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:58:55,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:58:55,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:58:55,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124316896] [2023-11-26 11:58:55,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:58:55,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:58:55,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:55,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:58:55,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:58:55,739 INFO L87 Difference]: Start difference. First operand 5596 states and 6603 transitions. Second operand has 4 states, 4 states have (on average 63.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:57,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:58:57,773 INFO L93 Difference]: Finished difference Result 11537 states and 13563 transitions. [2023-11-26 11:58:57,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:58:57,774 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 63.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 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 252 [2023-11-26 11:58:57,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:58:57,806 INFO L225 Difference]: With dead ends: 11537 [2023-11-26 11:58:57,806 INFO L226 Difference]: Without dead ends: 5942 [2023-11-26 11:58:57,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:58:57,814 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 173 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1240 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 1240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-26 11:58:57,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 362 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 1240 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-26 11:58:57,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5942 states. [2023-11-26 11:58:58,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5942 to 5925. [2023-11-26 11:58:58,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5925 states, 5924 states have (on average 1.1711681296421337) internal successors, (6938), 5924 states have internal predecessors, (6938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:58,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5925 states to 5925 states and 6938 transitions. [2023-11-26 11:58:58,037 INFO L78 Accepts]: Start accepts. Automaton has 5925 states and 6938 transitions. Word has length 252 [2023-11-26 11:58:58,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:58:58,038 INFO L495 AbstractCegarLoop]: Abstraction has 5925 states and 6938 transitions. [2023-11-26 11:58:58,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:58,039 INFO L276 IsEmpty]: Start isEmpty. Operand 5925 states and 6938 transitions. [2023-11-26 11:58:58,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2023-11-26 11:58:58,048 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:58:58,048 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:58:58,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 11:58:58,049 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:58:58,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:58,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1477557931, now seen corresponding path program 1 times [2023-11-26 11:58:58,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:58,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537975761] [2023-11-26 11:58:58,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:58,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:58,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:59,000 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:58:59,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:59,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537975761] [2023-11-26 11:58:59,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537975761] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:58:59,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:58:59,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 11:58:59,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732184044] [2023-11-26 11:58:59,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:58:59,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:58:59,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:59,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:58:59,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:58:59,007 INFO L87 Difference]: Start difference. First operand 5925 states and 6938 transitions. Second operand has 7 states, 7 states have (on average 48.42857142857143) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:01,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:01,677 INFO L93 Difference]: Finished difference Result 11379 states and 13387 transitions. [2023-11-26 11:59:01,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:59:01,678 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 48.42857142857143) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 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 339 [2023-11-26 11:59:01,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:01,709 INFO L225 Difference]: With dead ends: 11379 [2023-11-26 11:59:01,709 INFO L226 Difference]: Without dead ends: 5596 [2023-11-26 11:59:01,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:59:01,718 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 308 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1866 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 2225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 1866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:01,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 281 Invalid, 2225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 1866 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-26 11:59:01,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5596 states. [2023-11-26 11:59:01,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5596 to 5596. [2023-11-26 11:59:01,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5596 states, 5595 states have (on average 1.068811438784629) internal successors, (5980), 5595 states have internal predecessors, (5980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:01,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5596 states to 5596 states and 5980 transitions. [2023-11-26 11:59:01,888 INFO L78 Accepts]: Start accepts. Automaton has 5596 states and 5980 transitions. Word has length 339 [2023-11-26 11:59:01,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:01,888 INFO L495 AbstractCegarLoop]: Abstraction has 5596 states and 5980 transitions. [2023-11-26 11:59:01,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 48.42857142857143) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:01,889 INFO L276 IsEmpty]: Start isEmpty. Operand 5596 states and 5980 transitions. [2023-11-26 11:59:01,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2023-11-26 11:59:01,895 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:01,895 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:01,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 11:59:01,896 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:59:01,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:01,897 INFO L85 PathProgramCache]: Analyzing trace with hash 364662411, now seen corresponding path program 1 times [2023-11-26 11:59:01,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:01,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635093267] [2023-11-26 11:59:01,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:01,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:01,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:02,225 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-11-26 11:59:02,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:02,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635093267] [2023-11-26 11:59:02,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635093267] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:02,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:02,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:59:02,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393232612] [2023-11-26 11:59:02,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:02,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:59:02,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:02,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:59:02,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:59:02,228 INFO L87 Difference]: Start difference. First operand 5596 states and 5980 transitions. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:03,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:03,493 INFO L93 Difference]: Finished difference Result 12836 states and 13842 transitions. [2023-11-26 11:59:03,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:59:03,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 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 346 [2023-11-26 11:59:03,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:03,560 INFO L225 Difference]: With dead ends: 12836 [2023-11-26 11:59:03,561 INFO L226 Difference]: Without dead ends: 7570 [2023-11-26 11:59:03,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:59:03,628 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 340 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:03,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 38 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-26 11:59:03,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7570 states. [2023-11-26 11:59:03,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7570 to 7570. [2023-11-26 11:59:03,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7570 states, 7569 states have (on average 1.0738538776588717) internal successors, (8128), 7569 states have internal predecessors, (8128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:03,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7570 states to 7570 states and 8128 transitions. [2023-11-26 11:59:03,785 INFO L78 Accepts]: Start accepts. Automaton has 7570 states and 8128 transitions. Word has length 346 [2023-11-26 11:59:03,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:03,787 INFO L495 AbstractCegarLoop]: Abstraction has 7570 states and 8128 transitions. [2023-11-26 11:59:03,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:03,788 INFO L276 IsEmpty]: Start isEmpty. Operand 7570 states and 8128 transitions. [2023-11-26 11:59:03,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2023-11-26 11:59:03,795 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:03,795 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-26 11:59:03,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 11:59:03,796 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:59:03,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:03,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1945736612, now seen corresponding path program 1 times [2023-11-26 11:59:03,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:03,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439821639] [2023-11-26 11:59:03,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:03,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:03,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:04,212 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2023-11-26 11:59:04,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:04,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439821639] [2023-11-26 11:59:04,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439821639] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:04,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:04,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:59:04,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829694956] [2023-11-26 11:59:04,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:04,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:59:04,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:04,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:59:04,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:59:04,215 INFO L87 Difference]: Start difference. First operand 7570 states and 8128 transitions. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:05,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:05,665 INFO L93 Difference]: Finished difference Result 16784 states and 18138 transitions. [2023-11-26 11:59:05,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:59:05,666 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 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 400 [2023-11-26 11:59:05,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:05,691 INFO L225 Difference]: With dead ends: 16784 [2023-11-26 11:59:05,691 INFO L226 Difference]: Without dead ends: 9544 [2023-11-26 11:59:05,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:59:05,703 INFO L413 NwaCegarLoop]: 434 mSDtfsCounter, 326 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:05,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 439 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-26 11:59:05,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9544 states. [2023-11-26 11:59:05,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9544 to 9215. [2023-11-26 11:59:05,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9215 states, 9214 states have (on average 1.066746255697851) internal successors, (9829), 9214 states have internal predecessors, (9829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:05,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9215 states to 9215 states and 9829 transitions. [2023-11-26 11:59:05,881 INFO L78 Accepts]: Start accepts. Automaton has 9215 states and 9829 transitions. Word has length 400 [2023-11-26 11:59:05,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:05,887 INFO L495 AbstractCegarLoop]: Abstraction has 9215 states and 9829 transitions. [2023-11-26 11:59:05,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:05,888 INFO L276 IsEmpty]: Start isEmpty. Operand 9215 states and 9829 transitions. [2023-11-26 11:59:05,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2023-11-26 11:59:05,899 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:05,900 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-26 11:59:05,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-26 11:59:05,901 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:59:05,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:05,902 INFO L85 PathProgramCache]: Analyzing trace with hash -976003746, now seen corresponding path program 1 times [2023-11-26 11:59:05,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:05,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493399054] [2023-11-26 11:59:05,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:05,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:06,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:06,770 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2023-11-26 11:59:06,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:06,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493399054] [2023-11-26 11:59:06,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493399054] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:59:06,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455476666] [2023-11-26 11:59:06,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:06,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:06,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_defa07d0-5ed6-491f-ac44-28f14b39c05d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:06,780 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_defa07d0-5ed6-491f-ac44-28f14b39c05d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:06,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_defa07d0-5ed6-491f-ac44-28f14b39c05d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:59:07,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:07,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:59:07,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:07,836 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2023-11-26 11:59:07,837 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:59:07,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455476666] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:07,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:59:07,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-11-26 11:59:07,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077857666] [2023-11-26 11:59:07,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:07,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:59:07,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:07,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:59:07,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:59:07,840 INFO L87 Difference]: Start difference. First operand 9215 states and 9829 transitions. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 2 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:08,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:08,990 INFO L93 Difference]: Finished difference Result 11520 states and 12188 transitions. [2023-11-26 11:59:08,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:59:08,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 2 states have internal predecessors, (239), 0 states have call successors, (0), 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 461 [2023-11-26 11:59:08,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:09,010 INFO L225 Difference]: With dead ends: 11520 [2023-11-26 11:59:09,011 INFO L226 Difference]: Without dead ends: 11518 [2023-11-26 11:59:09,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 460 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:59:09,014 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 116 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:09,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 81 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-26 11:59:09,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11518 states. [2023-11-26 11:59:09,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11518 to 9873. [2023-11-26 11:59:09,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9873 states, 9872 states have (on average 1.0646272285251215) internal successors, (10510), 9872 states have internal predecessors, (10510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:09,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9873 states to 9873 states and 10510 transitions. [2023-11-26 11:59:09,171 INFO L78 Accepts]: Start accepts. Automaton has 9873 states and 10510 transitions. Word has length 461 [2023-11-26 11:59:09,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:09,172 INFO L495 AbstractCegarLoop]: Abstraction has 9873 states and 10510 transitions. [2023-11-26 11:59:09,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 2 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:09,173 INFO L276 IsEmpty]: Start isEmpty. Operand 9873 states and 10510 transitions. [2023-11-26 11:59:09,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 810 [2023-11-26 11:59:09,205 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:09,205 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-26 11:59:09,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_defa07d0-5ed6-491f-ac44-28f14b39c05d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:09,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_defa07d0-5ed6-491f-ac44-28f14b39c05d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:09,413 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:59:09,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:09,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1322744695, now seen corresponding path program 1 times [2023-11-26 11:59:09,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:09,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981735999] [2023-11-26 11:59:09,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:09,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:09,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:10,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1137 backedges. 760 proven. 0 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2023-11-26 11:59:10,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:10,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981735999] [2023-11-26 11:59:10,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981735999] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:10,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:10,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:59:10,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906628569] [2023-11-26 11:59:10,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:10,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:59:10,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:10,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:59:10,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:59:10,382 INFO L87 Difference]: Start difference. First operand 9873 states and 10510 transitions. Second operand has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:11,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:11,755 INFO L93 Difference]: Finished difference Result 19416 states and 20688 transitions. [2023-11-26 11:59:11,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:59:11,756 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 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 809 [2023-11-26 11:59:11,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:11,775 INFO L225 Difference]: With dead ends: 19416 [2023-11-26 11:59:11,776 INFO L226 Difference]: Without dead ends: 9873 [2023-11-26 11:59:11,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:59:11,786 INFO L413 NwaCegarLoop]: 427 mSDtfsCounter, 222 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:11,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 431 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-26 11:59:11,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9873 states. [2023-11-26 11:59:11,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9873 to 9215. [2023-11-26 11:59:12,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9215 states, 9214 states have (on average 1.0460169307575429) internal successors, (9638), 9214 states have internal predecessors, (9638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:12,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9215 states to 9215 states and 9638 transitions. [2023-11-26 11:59:12,021 INFO L78 Accepts]: Start accepts. Automaton has 9215 states and 9638 transitions. Word has length 809 [2023-11-26 11:59:12,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:12,023 INFO L495 AbstractCegarLoop]: Abstraction has 9215 states and 9638 transitions. [2023-11-26 11:59:12,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:12,024 INFO L276 IsEmpty]: Start isEmpty. Operand 9215 states and 9638 transitions. [2023-11-26 11:59:12,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 811 [2023-11-26 11:59:12,068 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:12,070 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-26 11:59:12,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-26 11:59:12,071 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:59:12,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:12,071 INFO L85 PathProgramCache]: Analyzing trace with hash -2005368910, now seen corresponding path program 1 times [2023-11-26 11:59:12,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:12,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489972364] [2023-11-26 11:59:12,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:12,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:12,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:13,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1141 backedges. 481 proven. 0 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2023-11-26 11:59:13,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:13,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489972364] [2023-11-26 11:59:13,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489972364] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:13,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:13,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:59:13,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73916730] [2023-11-26 11:59:13,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:13,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:59:13,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:13,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:59:13,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:59:13,843 INFO L87 Difference]: Start difference. First operand 9215 states and 9638 transitions. Second operand has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:15,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:15,069 INFO L93 Difference]: Finished difference Result 18100 states and 18944 transitions. [2023-11-26 11:59:15,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:59:15,073 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 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 810 [2023-11-26 11:59:15,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:15,091 INFO L225 Difference]: With dead ends: 18100 [2023-11-26 11:59:15,091 INFO L226 Difference]: Without dead ends: 9215 [2023-11-26 11:59:15,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:59:15,100 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 210 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:15,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 36 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-26 11:59:15,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9215 states. [2023-11-26 11:59:15,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9215 to 9215. [2023-11-26 11:59:15,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9215 states, 9214 states have (on average 1.0408074668981984) internal successors, (9590), 9214 states have internal predecessors, (9590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:15,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9215 states to 9215 states and 9590 transitions. [2023-11-26 11:59:15,217 INFO L78 Accepts]: Start accepts. Automaton has 9215 states and 9590 transitions. Word has length 810 [2023-11-26 11:59:15,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:15,219 INFO L495 AbstractCegarLoop]: Abstraction has 9215 states and 9590 transitions. [2023-11-26 11:59:15,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:15,219 INFO L276 IsEmpty]: Start isEmpty. Operand 9215 states and 9590 transitions. [2023-11-26 11:59:15,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 865 [2023-11-26 11:59:15,236 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:15,237 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-26 11:59:15,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-26 11:59:15,237 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:59:15,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:15,238 INFO L85 PathProgramCache]: Analyzing trace with hash -2021486551, now seen corresponding path program 1 times [2023-11-26 11:59:15,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:15,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751074854] [2023-11-26 11:59:15,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:15,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:15,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:16,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 527 proven. 0 refuted. 0 times theorem prover too weak. 799 trivial. 0 not checked. [2023-11-26 11:59:16,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:16,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751074854] [2023-11-26 11:59:16,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751074854] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:16,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:16,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:59:16,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315020844] [2023-11-26 11:59:16,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:16,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:59:16,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:16,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:59:16,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:59:16,195 INFO L87 Difference]: Start difference. First operand 9215 states and 9590 transitions. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:17,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:17,303 INFO L93 Difference]: Finished difference Result 23035 states and 24049 transitions. [2023-11-26 11:59:17,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:59:17,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 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 864 [2023-11-26 11:59:17,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:17,319 INFO L225 Difference]: With dead ends: 23035 [2023-11-26 11:59:17,319 INFO L226 Difference]: Without dead ends: 12505 [2023-11-26 11:59:17,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:59:17,330 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 198 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:17,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 427 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-26 11:59:17,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12505 states. [2023-11-26 11:59:17,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12505 to 12176. [2023-11-26 11:59:17,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12176 states, 12175 states have (on average 1.033429158110883) internal successors, (12582), 12175 states have internal predecessors, (12582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:17,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12176 states to 12176 states and 12582 transitions. [2023-11-26 11:59:17,490 INFO L78 Accepts]: Start accepts. Automaton has 12176 states and 12582 transitions. Word has length 864 [2023-11-26 11:59:17,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:17,492 INFO L495 AbstractCegarLoop]: Abstraction has 12176 states and 12582 transitions. [2023-11-26 11:59:17,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:17,492 INFO L276 IsEmpty]: Start isEmpty. Operand 12176 states and 12582 transitions. [2023-11-26 11:59:17,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1241 [2023-11-26 11:59:17,523 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:17,524 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-26 11:59:17,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-26 11:59:17,525 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:59:17,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:17,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1473026779, now seen corresponding path program 1 times [2023-11-26 11:59:17,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:17,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102490074] [2023-11-26 11:59:17,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:17,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:17,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat