./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem19_label10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa2a99c-dee0-4a87-b012-d585955639c2/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa2a99c-dee0-4a87-b012-d585955639c2/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa2a99c-dee0-4a87-b012-d585955639c2/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa2a99c-dee0-4a87-b012-d585955639c2/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem19_label10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa2a99c-dee0-4a87-b012-d585955639c2/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa2a99c-dee0-4a87-b012-d585955639c2/bin/uautomizer-verify-zZY32mL2XJ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0020262eba5474e3784f7f1343eb8b68c85d1b28aae47daf6eecda6cdc03e612 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:43:27,254 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:43:27,375 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa2a99c-dee0-4a87-b012-d585955639c2/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 21:43:27,388 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:43:27,389 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:43:27,423 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:43:27,425 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:43:27,426 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:43:27,427 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 21:43:27,432 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 21:43:27,433 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:43:27,433 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:43:27,434 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 21:43:27,436 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 21:43:27,436 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 21:43:27,437 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:43:27,437 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:43:27,438 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:43:27,438 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:43:27,439 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:43:27,439 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:43:27,440 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:43:27,440 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:43:27,441 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:43:27,441 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:43:27,442 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:43:27,442 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:43:27,443 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:43:27,444 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 21:43:27,444 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:43:27,445 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:43:27,446 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:43:27,446 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:43:27,446 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:43:27,446 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:43:27,447 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 21:43:27,447 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:43:27,447 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:43:27,448 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 21:43:27,448 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:43:27,448 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 21:43:27,448 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:43:27,449 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_bfa2a99c-dee0-4a87-b012-d585955639c2/bin/uautomizer-verify-zZY32mL2XJ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa2a99c-dee0-4a87-b012-d585955639c2/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0020262eba5474e3784f7f1343eb8b68c85d1b28aae47daf6eecda6cdc03e612 [2023-11-23 21:43:27,757 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:43:27,790 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:43:27,793 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:43:27,794 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:43:27,795 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:43:27,796 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa2a99c-dee0-4a87-b012-d585955639c2/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/eca-rers2012/Problem19_label10.c [2023-11-23 21:43:30,962 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:43:31,742 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:43:31,744 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa2a99c-dee0-4a87-b012-d585955639c2/sv-benchmarks/c/eca-rers2012/Problem19_label10.c [2023-11-23 21:43:31,810 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa2a99c-dee0-4a87-b012-d585955639c2/bin/uautomizer-verify-zZY32mL2XJ/data/090600717/9bc841605a544dee9d1ff196d59f8a68/FLAGb427f687a [2023-11-23 21:43:31,827 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa2a99c-dee0-4a87-b012-d585955639c2/bin/uautomizer-verify-zZY32mL2XJ/data/090600717/9bc841605a544dee9d1ff196d59f8a68 [2023-11-23 21:43:31,833 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:43:31,835 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:43:31,840 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:43:31,840 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:43:31,846 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:43:31,847 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:43:31" (1/1) ... [2023-11-23 21:43:31,848 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22764662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:43:31, skipping insertion in model container [2023-11-23 21:43:31,849 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:43:31" (1/1) ... [2023-11-23 21:43:32,131 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:43:32,491 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_bfa2a99c-dee0-4a87-b012-d585955639c2/sv-benchmarks/c/eca-rers2012/Problem19_label10.c[1448,1461] [2023-11-23 21:43:34,248 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:43:34,262 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:43:34,281 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_bfa2a99c-dee0-4a87-b012-d585955639c2/sv-benchmarks/c/eca-rers2012/Problem19_label10.c[1448,1461] [2023-11-23 21:43:35,445 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:43:35,502 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:43:35,503 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:43:35 WrapperNode [2023-11-23 21:43:35,504 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:43:35,505 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:43:35,506 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:43:35,506 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:43:35,515 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:43:35" (1/1) ... [2023-11-23 21:43:35,644 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:43:35" (1/1) ... [2023-11-23 21:43:36,787 INFO L138 Inliner]: procedures = 19, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 9426 [2023-11-23 21:43:36,809 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:43:36,810 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:43:36,811 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:43:36,811 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:43:36,825 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:43:35" (1/1) ... [2023-11-23 21:43:36,839 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:43:35" (1/1) ... [2023-11-23 21:43:37,227 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:43:35" (1/1) ... [2023-11-23 21:43:37,553 INFO L189 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-23 21:43:37,553 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:43:35" (1/1) ... [2023-11-23 21:43:37,554 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:43:35" (1/1) ... [2023-11-23 21:43:38,079 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:43:35" (1/1) ... [2023-11-23 21:43:38,223 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:43:35" (1/1) ... [2023-11-23 21:43:38,303 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:43:35" (1/1) ... [2023-11-23 21:43:38,356 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:43:35" (1/1) ... [2023-11-23 21:43:38,496 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:43:38,498 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:43:38,498 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:43:38,499 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:43:38,500 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:43:35" (1/1) ... [2023-11-23 21:43:38,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:43:38,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa2a99c-dee0-4a87-b012-d585955639c2/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:43:38,565 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa2a99c-dee0-4a87-b012-d585955639c2/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:43:38,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfa2a99c-dee0-4a87-b012-d585955639c2/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:43:38,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:43:38,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 21:43:38,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:43:38,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:43:38,826 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:43:38,843 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:43:48,663 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:43:48,758 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:43:48,758 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 21:43:48,760 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:43:48 BoogieIcfgContainer [2023-11-23 21:43:48,760 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:43:48,763 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:43:48,763 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:43:48,767 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:43:48,767 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:43:31" (1/3) ... [2023-11-23 21:43:48,768 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33f4149f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:43:48, skipping insertion in model container [2023-11-23 21:43:48,768 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:43:35" (2/3) ... [2023-11-23 21:43:48,768 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33f4149f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:43:48, skipping insertion in model container [2023-11-23 21:43:48,768 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:43:48" (3/3) ... [2023-11-23 21:43:48,770 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label10.c [2023-11-23 21:43:48,790 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:43:48,790 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:43:48,881 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:43:48,889 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;@589e3e30, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:43:48,889 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:43:48,901 INFO L276 IsEmpty]: Start isEmpty. Operand has 1686 states, 1684 states have (on average 1.902019002375297) internal successors, (3203), 1685 states have internal predecessors, (3203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:43:48,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-23 21:43:48,908 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:43:48,909 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-23 21:43:48,909 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:43:48,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:43:48,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1123713512, now seen corresponding path program 1 times [2023-11-23 21:43:48,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:43:48,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748366433] [2023-11-23 21:43:48,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:43:48,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:43:49,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:43:49,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:43:49,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:43:49,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748366433] [2023-11-23 21:43:49,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748366433] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:43:49,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:43:49,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:43:49,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874616137] [2023-11-23 21:43:49,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:43:49,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:43:49,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:43:49,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:43:49,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:43:49,180 INFO L87 Difference]: Start difference. First operand has 1686 states, 1684 states have (on average 1.902019002375297) internal successors, (3203), 1685 states have internal predecessors, (3203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:43:58,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:43:58,813 INFO L93 Difference]: Finished difference Result 4817 states and 9258 transitions. [2023-11-23 21:43:58,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:43:58,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2023-11-23 21:43:58,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:43:58,860 INFO L225 Difference]: With dead ends: 4817 [2023-11-23 21:43:58,861 INFO L226 Difference]: Without dead ends: 3128 [2023-11-23 21:43:58,873 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 [2023-11-23 21:43:58,880 INFO L413 NwaCegarLoop]: 1325 mSDtfsCounter, 1602 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 4271 mSolverCounterSat, 1473 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1602 SdHoareTripleChecker+Valid, 1545 SdHoareTripleChecker+Invalid, 5744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1473 IncrementalHoareTripleChecker+Valid, 4271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:43:58,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1602 Valid, 1545 Invalid, 5744 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1473 Valid, 4271 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2023-11-23 21:43:58,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3128 states. [2023-11-23 21:43:59,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3128 to 3107. [2023-11-23 21:43:59,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3107 states, 3106 states have (on average 1.601416613007083) internal successors, (4974), 3106 states have internal predecessors, (4974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:43:59,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3107 states to 3107 states and 4974 transitions. [2023-11-23 21:43:59,070 INFO L78 Accepts]: Start accepts. Automaton has 3107 states and 4974 transitions. Word has length 6 [2023-11-23 21:43:59,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:43:59,071 INFO L495 AbstractCegarLoop]: Abstraction has 3107 states and 4974 transitions. [2023-11-23 21:43:59,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:43:59,072 INFO L276 IsEmpty]: Start isEmpty. Operand 3107 states and 4974 transitions. [2023-11-23 21:43:59,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-23 21:43:59,075 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:43:59,075 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 21:43:59,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:43:59,076 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:43:59,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:43:59,077 INFO L85 PathProgramCache]: Analyzing trace with hash 2003806293, now seen corresponding path program 1 times [2023-11-23 21:43:59,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:43:59,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647952690] [2023-11-23 21:43:59,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:43:59,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:43:59,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:43:59,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:43:59,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:43:59,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647952690] [2023-11-23 21:43:59,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647952690] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:43:59,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:43:59,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:43:59,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791677459] [2023-11-23 21:43:59,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:43:59,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:43:59,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:43:59,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:43:59,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:43:59,653 INFO L87 Difference]: Start difference. First operand 3107 states and 4974 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:44:12,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:44:12,648 INFO L93 Difference]: Finished difference Result 10358 states and 16186 transitions. [2023-11-23 21:44:12,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:44:12,654 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2023-11-23 21:44:12,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:44:12,698 INFO L225 Difference]: With dead ends: 10358 [2023-11-23 21:44:12,699 INFO L226 Difference]: Without dead ends: 7252 [2023-11-23 21:44:12,704 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 [2023-11-23 21:44:12,706 INFO L413 NwaCegarLoop]: 1023 mSDtfsCounter, 4320 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 9505 mSolverCounterSat, 1498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4320 SdHoareTripleChecker+Valid, 1292 SdHoareTripleChecker+Invalid, 11003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1498 IncrementalHoareTripleChecker+Valid, 9505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:44:12,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4320 Valid, 1292 Invalid, 11003 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1498 Valid, 9505 Invalid, 0 Unknown, 0 Unchecked, 12.5s Time] [2023-11-23 21:44:12,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7252 states. [2023-11-23 21:44:12,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7252 to 7248. [2023-11-23 21:44:12,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7248 states, 7247 states have (on average 1.450255278046088) internal successors, (10510), 7247 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) [2023-11-23 21:44:12,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7248 states to 7248 states and 10510 transitions. [2023-11-23 21:44:12,873 INFO L78 Accepts]: Start accepts. Automaton has 7248 states and 10510 transitions. Word has length 73 [2023-11-23 21:44:12,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:44:12,874 INFO L495 AbstractCegarLoop]: Abstraction has 7248 states and 10510 transitions. [2023-11-23 21:44:12,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:44:12,875 INFO L276 IsEmpty]: Start isEmpty. Operand 7248 states and 10510 transitions. [2023-11-23 21:44:12,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2023-11-23 21:44:12,886 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:44:12,887 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:44:12,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:44:12,887 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:44:12,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:44:12,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1369560181, now seen corresponding path program 1 times [2023-11-23 21:44:12,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:44:12,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123823029] [2023-11-23 21:44:12,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:44:12,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:44:12,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:44:14,431 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 21:44:14,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:44:14,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123823029] [2023-11-23 21:44:14,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123823029] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:44:14,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:44:14,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:44:14,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856427014] [2023-11-23 21:44:14,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:44:14,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:44:14,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:44:14,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:44:14,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:44:14,437 INFO L87 Difference]: Start difference. First operand 7248 states and 10510 transitions. Second operand has 4 states, 4 states have (on average 71.5) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)