./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem17_label30.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_35d39559-58e4-4343-958d-d7e32714d846/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d39559-58e4-4343-958d-d7e32714d846/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d39559-58e4-4343-958d-d7e32714d846/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d39559-58e4-4343-958d-d7e32714d846/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem17_label30.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d39559-58e4-4343-958d-d7e32714d846/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d39559-58e4-4343-958d-d7e32714d846/bin/uautomizer-verify-NlZe1sFDwI --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 74ad95c89e825af3e8bd664b54190b589939097fe089144b4a47194abf94e882 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:27:54,916 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:27:55,063 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d39559-58e4-4343-958d-d7e32714d846/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-24 21:27:55,072 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:27:55,072 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:27:55,114 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:27:55,115 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:27:55,115 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:27:55,118 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:27:55,123 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:27:55,124 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:27:55,124 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:27:55,125 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:27:55,126 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:27:55,127 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:27:55,127 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:27:55,128 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 21:27:55,128 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:27:55,129 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:27:55,129 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:27:55,129 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:27:55,130 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 21:27:55,130 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:27:55,131 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 21:27:55,131 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:27:55,131 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 21:27:55,132 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:27:55,133 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:27:55,133 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:27:55,133 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:27:55,135 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:27:55,135 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:27:55,135 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:27:55,135 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:27:55,136 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 21:27:55,136 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:27:55,136 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:27:55,136 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:27:55,137 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:27:55,137 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 21:27:55,137 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:27:55,137 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:27:55,138 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_35d39559-58e4-4343-958d-d7e32714d846/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d39559-58e4-4343-958d-d7e32714d846/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 74ad95c89e825af3e8bd664b54190b589939097fe089144b4a47194abf94e882 [2023-11-24 21:27:55,399 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:27:55,432 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:27:55,435 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:27:55,436 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:27:55,437 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:27:55,439 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d39559-58e4-4343-958d-d7e32714d846/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/eca-rers2012/Problem17_label30.c [2023-11-24 21:27:58,554 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:27:59,075 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:27:59,076 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d39559-58e4-4343-958d-d7e32714d846/sv-benchmarks/c/eca-rers2012/Problem17_label30.c [2023-11-24 21:27:59,104 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d39559-58e4-4343-958d-d7e32714d846/bin/uautomizer-verify-NlZe1sFDwI/data/5c2858587/5bfafdc5954143d2b336e7ec75df24b2/FLAG14a871fd8 [2023-11-24 21:27:59,120 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d39559-58e4-4343-958d-d7e32714d846/bin/uautomizer-verify-NlZe1sFDwI/data/5c2858587/5bfafdc5954143d2b336e7ec75df24b2 [2023-11-24 21:27:59,127 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:27:59,131 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:27:59,135 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:27:59,135 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:27:59,141 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:27:59,141 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:27:59" (1/1) ... [2023-11-24 21:27:59,143 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e72eda0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:59, skipping insertion in model container [2023-11-24 21:27:59,143 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:27:59" (1/1) ... [2023-11-24 21:27:59,251 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:27:59,540 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_35d39559-58e4-4343-958d-d7e32714d846/sv-benchmarks/c/eca-rers2012/Problem17_label30.c[3774,3787] [2023-11-24 21:28:00,394 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:28:00,406 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:28:00,433 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_35d39559-58e4-4343-958d-d7e32714d846/sv-benchmarks/c/eca-rers2012/Problem17_label30.c[3774,3787] [2023-11-24 21:28:00,760 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:28:00,783 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:28:00,784 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:28:00 WrapperNode [2023-11-24 21:28:00,784 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:28:00,786 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:28:00,786 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:28:00,786 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:28:00,794 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:28:00" (1/1) ... [2023-11-24 21:28:00,863 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:28:00" (1/1) ... [2023-11-24 21:28:01,185 INFO L138 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2612 [2023-11-24 21:28:01,185 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:28:01,186 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:28:01,186 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:28:01,187 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:28:01,199 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:28:00" (1/1) ... [2023-11-24 21:28:01,200 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:28:00" (1/1) ... [2023-11-24 21:28:01,249 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:28:00" (1/1) ... [2023-11-24 21:28:01,464 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]. [2023-11-24 21:28:01,471 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:28:00" (1/1) ... [2023-11-24 21:28:01,471 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:28:00" (1/1) ... [2023-11-24 21:28:01,663 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:28:00" (1/1) ... [2023-11-24 21:28:01,700 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:28:00" (1/1) ... [2023-11-24 21:28:01,743 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:28:00" (1/1) ... [2023-11-24 21:28:01,758 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:28:00" (1/1) ... [2023-11-24 21:28:01,827 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:28:01,830 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:28:01,830 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:28:01,830 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:28:01,832 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:28:00" (1/1) ... [2023-11-24 21:28:01,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:28:01,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d39559-58e4-4343-958d-d7e32714d846/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:28:01,874 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d39559-58e4-4343-958d-d7e32714d846/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:28:01,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d39559-58e4-4343-958d-d7e32714d846/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:28:01,918 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:28:01,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:28:01,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:28:01,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:28:01,998 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:28:02,001 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:28:06,598 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:28:06,671 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:28:06,673 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 21:28:06,674 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:28:06 BoogieIcfgContainer [2023-11-24 21:28:06,674 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:28:06,677 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:28:06,677 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:28:06,681 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:28:06,681 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:27:59" (1/3) ... [2023-11-24 21:28:06,682 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b789272 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:28:06, skipping insertion in model container [2023-11-24 21:28:06,682 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:28:00" (2/3) ... [2023-11-24 21:28:06,684 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b789272 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:28:06, skipping insertion in model container [2023-11-24 21:28:06,684 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:28:06" (3/3) ... [2023-11-24 21:28:06,687 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label30.c [2023-11-24 21:28:06,709 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:28:06,709 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 21:28:06,790 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:28:06,798 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;@482bb1ef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:28:06,798 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 21:28:06,806 INFO L276 IsEmpty]: Start isEmpty. Operand has 528 states, 526 states have (on average 1.9011406844106464) internal successors, (1000), 527 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:28:06,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-24 21:28:06,813 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:28:06,814 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:28:06,815 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:28:06,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:28:06,822 INFO L85 PathProgramCache]: Analyzing trace with hash -435000657, now seen corresponding path program 1 times [2023-11-24 21:28:06,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:28:06,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523893803] [2023-11-24 21:28:06,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:28:06,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:28:06,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:07,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:28:07,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:28:07,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523893803] [2023-11-24 21:28:07,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523893803] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:28:07,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:28:07,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:28:07,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105143156] [2023-11-24 21:28:07,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:28:07,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 21:28:07,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:28:07,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 21:28:07,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 21:28:07,103 INFO L87 Difference]: Start difference. First operand has 528 states, 526 states have (on average 1.9011406844106464) internal successors, (1000), 527 states have internal predecessors, (1000), 0 states have call successors, (0), 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 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:28:07,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:28:07,218 INFO L93 Difference]: Finished difference Result 1055 states and 1999 transitions. [2023-11-24 21:28:07,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 21:28:07,221 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2023-11-24 21:28:07,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:28:07,238 INFO L225 Difference]: With dead ends: 1055 [2023-11-24 21:28:07,238 INFO L226 Difference]: Without dead ends: 526 [2023-11-24 21:28:07,244 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 [2023-11-24 21:28:07,248 INFO L413 NwaCegarLoop]: 935 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, 935 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 [2023-11-24 21:28:07,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 935 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:28:07,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2023-11-24 21:28:07,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 526. [2023-11-24 21:28:07,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 525 states have (on average 1.7809523809523808) internal successors, (935), 525 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:28:07,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 935 transitions. [2023-11-24 21:28:07,338 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 935 transitions. Word has length 23 [2023-11-24 21:28:07,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:28:07,339 INFO L495 AbstractCegarLoop]: Abstraction has 526 states and 935 transitions. [2023-11-24 21:28:07,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:28:07,340 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 935 transitions. [2023-11-24 21:28:07,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-24 21:28:07,341 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:28:07,341 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:28:07,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:28:07,342 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:28:07,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:28:07,343 INFO L85 PathProgramCache]: Analyzing trace with hash -51117638, now seen corresponding path program 1 times [2023-11-24 21:28:07,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:28:07,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526292708] [2023-11-24 21:28:07,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:28:07,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:28:07,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:07,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:28:07,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:28:07,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526292708] [2023-11-24 21:28:07,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526292708] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:28:07,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:28:07,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:28:07,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028854357] [2023-11-24 21:28:07,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:28:07,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:28:07,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:28:07,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:28:07,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:28:07,537 INFO L87 Difference]: Start difference. First operand 526 states and 935 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:28:11,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:28:11,315 INFO L93 Difference]: Finished difference Result 1522 states and 2728 transitions. [2023-11-24 21:28:11,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:28:11,316 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2023-11-24 21:28:11,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:28:11,324 INFO L225 Difference]: With dead ends: 1522 [2023-11-24 21:28:11,324 INFO L226 Difference]: Without dead ends: 997 [2023-11-24 21:28:11,328 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 [2023-11-24 21:28:11,329 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 487 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1492 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 1843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 1492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-11-24 21:28:11,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [487 Valid, 239 Invalid, 1843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 1492 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-11-24 21:28:11,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2023-11-24 21:28:11,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 981. [2023-11-24 21:28:11,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 980 states have (on average 1.7081632653061225) internal successors, (1674), 980 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:28:11,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1674 transitions. [2023-11-24 21:28:11,393 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1674 transitions. Word has length 23 [2023-11-24 21:28:11,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:28:11,393 INFO L495 AbstractCegarLoop]: Abstraction has 981 states and 1674 transitions. [2023-11-24 21:28:11,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:28:11,394 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1674 transitions. [2023-11-24 21:28:11,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-24 21:28:11,397 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:28:11,398 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:28:11,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:28:11,398 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:28:11,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:28:11,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1435741255, now seen corresponding path program 1 times [2023-11-24 21:28:11,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:28:11,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464615738] [2023-11-24 21:28:11,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:28:11,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:28:11,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:11,682 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:28:11,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:28:11,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464615738] [2023-11-24 21:28:11,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464615738] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:28:11,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:28:11,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:28:11,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825957745] [2023-11-24 21:28:11,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:28:11,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:28:11,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:28:11,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:28:11,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:28:11,692 INFO L87 Difference]: Start difference. First operand 981 states and 1674 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:28:15,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:28:15,218 INFO L93 Difference]: Finished difference Result 2840 states and 4880 transitions. [2023-11-24 21:28:15,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:28:15,218 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 0 states have call successors, (0), 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 88 [2023-11-24 21:28:15,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:28:15,231 INFO L225 Difference]: With dead ends: 2840 [2023-11-24 21:28:15,231 INFO L226 Difference]: Without dead ends: 1860 [2023-11-24 21:28:15,233 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 [2023-11-24 21:28:15,235 INFO L413 NwaCegarLoop]: 421 mSDtfsCounter, 407 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1341 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 1666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 1341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-11-24 21:28:15,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 494 Invalid, 1666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1341 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-11-24 21:28:15,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2023-11-24 21:28:15,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1856. [2023-11-24 21:28:15,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1856 states, 1855 states have (on average 1.4549865229110512) internal successors, (2699), 1855 states have internal predecessors, (2699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:28:15,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 2699 transitions. [2023-11-24 21:28:15,298 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 2699 transitions. Word has length 88 [2023-11-24 21:28:15,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:28:15,298 INFO L495 AbstractCegarLoop]: Abstraction has 1856 states and 2699 transitions. [2023-11-24 21:28:15,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:28:15,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 2699 transitions. [2023-11-24 21:28:15,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-11-24 21:28:15,310 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:28:15,311 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:28:15,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:28:15,311 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:28:15,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:28:15,312 INFO L85 PathProgramCache]: Analyzing trace with hash 761148988, now seen corresponding path program 1 times [2023-11-24 21:28:15,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:28:15,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316234806] [2023-11-24 21:28:15,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:28:15,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:28:15,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:15,937 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:28:15,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:28:15,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316234806] [2023-11-24 21:28:15,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316234806] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:28:15,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:28:15,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:28:15,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204188852] [2023-11-24 21:28:15,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:28:15,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:28:15,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:28:15,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:28:15,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:28:15,943 INFO L87 Difference]: Start difference. First operand 1856 states and 2699 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:28:19,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:28:19,937 INFO L93 Difference]: Finished difference Result 4590 states and 6639 transitions. [2023-11-24 21:28:19,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:28:19,939 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 0 states have call successors, (0), 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 128 [2023-11-24 21:28:19,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:28:19,956 INFO L225 Difference]: With dead ends: 4590 [2023-11-24 21:28:19,956 INFO L226 Difference]: Without dead ends: 2735 [2023-11-24 21:28:19,959 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 [2023-11-24 21:28:19,961 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 352 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1666 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 1764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-11-24 21:28:19,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 535 Invalid, 1764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1666 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-11-24 21:28:19,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2735 states. [2023-11-24 21:28:20,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2735 to 2715. [2023-11-24 21:28:20,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2715 states, 2714 states have (on average 1.3909358879882092) internal successors, (3775), 2714 states have internal predecessors, (3775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:28:20,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2715 states to 2715 states and 3775 transitions. [2023-11-24 21:28:20,036 INFO L78 Accepts]: Start accepts. Automaton has 2715 states and 3775 transitions. Word has length 128 [2023-11-24 21:28:20,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:28:20,037 INFO L495 AbstractCegarLoop]: Abstraction has 2715 states and 3775 transitions. [2023-11-24 21:28:20,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:28:20,037 INFO L276 IsEmpty]: Start isEmpty. Operand 2715 states and 3775 transitions. [2023-11-24 21:28:20,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-11-24 21:28:20,043 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:28:20,043 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:28:20,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:28:20,044 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:28:20,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:28:20,044 INFO L85 PathProgramCache]: Analyzing trace with hash 461202957, now seen corresponding path program 1 times [2023-11-24 21:28:20,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:28:20,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391255582] [2023-11-24 21:28:20,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:28:20,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:28:20,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:20,265 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:28:20,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:28:20,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391255582] [2023-11-24 21:28:20,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391255582] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:28:20,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:28:20,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:28:20,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579328061] [2023-11-24 21:28:20,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:28:20,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:28:20,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:28:20,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:28:20,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:28:20,270 INFO L87 Difference]: Start difference. First operand 2715 states and 3775 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:28:23,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:28:23,130 INFO L93 Difference]: Finished difference Result 6708 states and 9428 transitions. [2023-11-24 21:28:23,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:28:23,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2023-11-24 21:28:23,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:28:23,152 INFO L225 Difference]: With dead ends: 6708 [2023-11-24 21:28:23,152 INFO L226 Difference]: Without dead ends: 3994 [2023-11-24 21:28:23,156 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 [2023-11-24 21:28:23,157 INFO L413 NwaCegarLoop]: 514 mSDtfsCounter, 347 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1082 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 1630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-11-24 21:28:23,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 589 Invalid, 1630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1082 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-11-24 21:28:23,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3994 states. [2023-11-24 21:28:23,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3994 to 3141. [2023-11-24 21:28:23,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3141 states, 3140 states have (on average 1.2745222929936306) internal successors, (4002), 3140 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:28:23,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3141 states to 3141 states and 4002 transitions. [2023-11-24 21:28:23,234 INFO L78 Accepts]: Start accepts. Automaton has 3141 states and 4002 transitions. Word has length 134 [2023-11-24 21:28:23,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:28:23,235 INFO L495 AbstractCegarLoop]: Abstraction has 3141 states and 4002 transitions. [2023-11-24 21:28:23,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:28:23,235 INFO L276 IsEmpty]: Start isEmpty. Operand 3141 states and 4002 transitions. [2023-11-24 21:28:23,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-11-24 21:28:23,237 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:28:23,238 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:28:23,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:28:23,238 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:28:23,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:28:23,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1846940185, now seen corresponding path program 1 times [2023-11-24 21:28:23,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:28:23,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425707696] [2023-11-24 21:28:23,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:28:23,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:28:23,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:23,636 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:28:23,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:28:23,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425707696] [2023-11-24 21:28:23,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425707696] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:28:23,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:28:23,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:28:23,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892482925] [2023-11-24 21:28:23,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:28:23,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:28:23,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:28:23,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:28:23,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:28:23,639 INFO L87 Difference]: Start difference. First operand 3141 states and 4002 transitions. Second operand has 5 states, 5 states have (on average 34.2) internal successors, (171), 5 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:28:27,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:28:27,242 INFO L93 Difference]: Finished difference Result 8006 states and 10509 transitions. [2023-11-24 21:28:27,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:28:27,244 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.2) internal successors, (171), 5 states have internal predecessors, (171), 0 states have call successors, (0), 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 171 [2023-11-24 21:28:27,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:28:27,271 INFO L225 Difference]: With dead ends: 8006 [2023-11-24 21:28:27,271 INFO L226 Difference]: Without dead ends: 4866 [2023-11-24 21:28:27,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:28:27,276 INFO L413 NwaCegarLoop]: 754 mSDtfsCounter, 1655 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 1775 mSolverCounterSat, 978 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1655 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 2753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 978 IncrementalHoareTripleChecker+Valid, 1775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-11-24 21:28:27,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1655 Valid, 839 Invalid, 2753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [978 Valid, 1775 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-11-24 21:28:27,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4866 states. [2023-11-24 21:28:27,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4866 to 4851. [2023-11-24 21:28:27,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4851 states, 4850 states have (on average 1.26659793814433) internal successors, (6143), 4850 states have internal predecessors, (6143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:28:27,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4851 states to 4851 states and 6143 transitions. [2023-11-24 21:28:27,397 INFO L78 Accepts]: Start accepts. Automaton has 4851 states and 6143 transitions. Word has length 171 [2023-11-24 21:28:27,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:28:27,403 INFO L495 AbstractCegarLoop]: Abstraction has 4851 states and 6143 transitions. [2023-11-24 21:28:27,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.2) internal successors, (171), 5 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:28:27,404 INFO L276 IsEmpty]: Start isEmpty. Operand 4851 states and 6143 transitions. [2023-11-24 21:28:27,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2023-11-24 21:28:27,406 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:28:27,406 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:28:27,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:28:27,407 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:28:27,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:28:27,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1222559832, now seen corresponding path program 1 times [2023-11-24 21:28:27,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:28:27,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589102257] [2023-11-24 21:28:27,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:28:27,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:28:27,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:27,588 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-24 21:28:27,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:28:27,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589102257] [2023-11-24 21:28:27,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589102257] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:28:27,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:28:27,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:28:27,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488574295] [2023-11-24 21:28:27,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:28:27,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:28:27,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:28:27,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:28:27,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:28:27,591 INFO L87 Difference]: Start difference. First operand 4851 states and 6143 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:28:30,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:28:30,961 INFO L93 Difference]: Finished difference Result 12248 states and 15824 transitions. [2023-11-24 21:28:30,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:28:30,962 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 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 177 [2023-11-24 21:28:30,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:28:30,999 INFO L225 Difference]: With dead ends: 12248 [2023-11-24 21:28:30,999 INFO L226 Difference]: Without dead ends: 7398 [2023-11-24 21:28:31,006 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 [2023-11-24 21:28:31,009 INFO L413 NwaCegarLoop]: 479 mSDtfsCounter, 423 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1340 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 1696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 1340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:28:31,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 543 Invalid, 1696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 1340 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-11-24 21:28:31,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7398 states. [2023-11-24 21:28:31,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7398 to 4825. [2023-11-24 21:28:31,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4825 states, 4824 states have (on average 1.265339966832504) internal successors, (6104), 4824 states have internal predecessors, (6104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:28:31,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4825 states to 4825 states and 6104 transitions. [2023-11-24 21:28:31,140 INFO L78 Accepts]: Start accepts. Automaton has 4825 states and 6104 transitions. Word has length 177 [2023-11-24 21:28:31,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:28:31,141 INFO L495 AbstractCegarLoop]: Abstraction has 4825 states and 6104 transitions. [2023-11-24 21:28:31,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:28:31,141 INFO L276 IsEmpty]: Start isEmpty. Operand 4825 states and 6104 transitions. [2023-11-24 21:28:31,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2023-11-24 21:28:31,143 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:28:31,144 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2023-11-24 21:28:31,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 21:28:31,144 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:28:31,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:28:31,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1776975644, now seen corresponding path program 1 times [2023-11-24 21:28:31,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:28:31,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891309318] [2023-11-24 21:28:31,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:28:31,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:28:31,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:31,308 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-11-24 21:28:31,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:28:31,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891309318] [2023-11-24 21:28:31,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891309318] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:28:31,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:28:31,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:28:31,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724470693] [2023-11-24 21:28:31,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:28:31,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:28:31,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:28:31,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:28:31,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:28:31,310 INFO L87 Difference]: Start difference. First operand 4825 states and 6104 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:28:34,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:28:34,604 INFO L93 Difference]: Finished difference Result 13485 states and 17136 transitions. [2023-11-24 21:28:34,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:28:34,605 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 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 190 [2023-11-24 21:28:34,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:28:34,642 INFO L225 Difference]: With dead ends: 13485 [2023-11-24 21:28:34,642 INFO L226 Difference]: Without dead ends: 7354 [2023-11-24 21:28:34,648 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 [2023-11-24 21:28:34,649 INFO L413 NwaCegarLoop]: 603 mSDtfsCounter, 569 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 1822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 544 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:28:34,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [569 Valid, 632 Invalid, 1822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [544 Valid, 1278 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-11-24 21:28:34,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7354 states. [2023-11-24 21:28:34,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7354 to 6498. [2023-11-24 21:28:34,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6498 states, 6497 states have (on average 1.187163306141296) internal successors, (7713), 6497 states have internal predecessors, (7713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:28:34,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6498 states to 6498 states and 7713 transitions. [2023-11-24 21:28:34,795 INFO L78 Accepts]: Start accepts. Automaton has 6498 states and 7713 transitions. Word has length 190 [2023-11-24 21:28:34,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:28:34,796 INFO L495 AbstractCegarLoop]: Abstraction has 6498 states and 7713 transitions. [2023-11-24 21:28:34,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:28:34,796 INFO L276 IsEmpty]: Start isEmpty. Operand 6498 states and 7713 transitions. [2023-11-24 21:28:34,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2023-11-24 21:28:34,800 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:28:34,800 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:28:34,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 21:28:34,801 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:28:34,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:28:34,801 INFO L85 PathProgramCache]: Analyzing trace with hash 2032304414, now seen corresponding path program 1 times [2023-11-24 21:28:34,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:28:34,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827109870] [2023-11-24 21:28:34,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:28:34,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:28:34,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:35,344 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 43 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:28:35,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:28:35,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827109870] [2023-11-24 21:28:35,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827109870] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:28:35,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296880355] [2023-11-24 21:28:35,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:28:35,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:28:35,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d39559-58e4-4343-958d-d7e32714d846/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:28:35,349 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d39559-58e4-4343-958d-d7e32714d846/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:28:35,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d39559-58e4-4343-958d-d7e32714d846/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:28:35,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:35,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 21:28:35,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:28:35,994 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 43 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:28:35,995 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:28:36,468 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:28:36,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296880355] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-24 21:28:36,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:28:36,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 7 [2023-11-24 21:28:36,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753156115] [2023-11-24 21:28:36,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:28:36,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:28:36,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:28:36,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:28:36,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:28:36,474 INFO L87 Difference]: Start difference. First operand 6498 states and 7713 transitions. Second operand has 4 states, 4 states have (on average 60.75) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:28:40,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:28:40,279 INFO L93 Difference]: Finished difference Result 21950 states and 25849 transitions. [2023-11-24 21:28:40,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:28:40,279 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 60.75) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 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 243 [2023-11-24 21:28:40,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:28:40,308 INFO L225 Difference]: With dead ends: 21950 [2023-11-24 21:28:40,308 INFO L226 Difference]: Without dead ends: 15027 [2023-11-24 21:28:40,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:28:40,318 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 902 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 2076 mSolverCounterSat, 750 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 902 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 2826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 750 IncrementalHoareTripleChecker+Valid, 2076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-11-24 21:28:40,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [902 Valid, 115 Invalid, 2826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [750 Valid, 2076 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-11-24 21:28:40,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15027 states. [2023-11-24 21:28:40,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15027 to 15024. [2023-11-24 21:28:40,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15024 states, 15023 states have (on average 1.1618185448978233) internal successors, (17454), 15023 states have internal predecessors, (17454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:28:40,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15024 states to 15024 states and 17454 transitions. [2023-11-24 21:28:40,615 INFO L78 Accepts]: Start accepts. Automaton has 15024 states and 17454 transitions. Word has length 243 [2023-11-24 21:28:40,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:28:40,616 INFO L495 AbstractCegarLoop]: Abstraction has 15024 states and 17454 transitions. [2023-11-24 21:28:40,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.75) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:28:40,617 INFO L276 IsEmpty]: Start isEmpty. Operand 15024 states and 17454 transitions. [2023-11-24 21:28:40,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2023-11-24 21:28:40,622 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:28:40,623 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:28:40,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d39559-58e4-4343-958d-d7e32714d846/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:28:40,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d39559-58e4-4343-958d-d7e32714d846/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:28:40,830 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:28:40,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:28:40,830 INFO L85 PathProgramCache]: Analyzing trace with hash -979862628, now seen corresponding path program 1 times [2023-11-24 21:28:40,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:28:40,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726433104] [2023-11-24 21:28:40,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:28:40,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:28:40,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:41,052 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-11-24 21:28:41,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:28:41,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726433104] [2023-11-24 21:28:41,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726433104] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:28:41,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:28:41,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:28:41,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111472690] [2023-11-24 21:28:41,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:28:41,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:28:41,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:28:41,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:28:41,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:28:41,055 INFO L87 Difference]: Start difference. First operand 15024 states and 17454 transitions. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:28:43,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:28:43,525 INFO L93 Difference]: Finished difference Result 34300 states and 39677 transitions. [2023-11-24 21:28:43,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:28:43,526 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 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 261 [2023-11-24 21:28:43,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:28:43,565 INFO L225 Difference]: With dead ends: 34300 [2023-11-24 21:28:43,565 INFO L226 Difference]: Without dead ends: 18845 [2023-11-24 21:28:43,581 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 [2023-11-24 21:28:43,582 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 451 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1129 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 1352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 1129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:28:43,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 314 Invalid, 1352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1129 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-24 21:28:43,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18845 states. [2023-11-24 21:28:43,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18845 to 17142. [2023-11-24 21:28:43,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17142 states, 17141 states have (on average 1.149407852517356) internal successors, (19702), 17141 states have internal predecessors, (19702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:28:43,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17142 states to 17142 states and 19702 transitions. [2023-11-24 21:28:43,912 INFO L78 Accepts]: Start accepts. Automaton has 17142 states and 19702 transitions. Word has length 261 [2023-11-24 21:28:43,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:28:43,912 INFO L495 AbstractCegarLoop]: Abstraction has 17142 states and 19702 transitions. [2023-11-24 21:28:43,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:28:43,913 INFO L276 IsEmpty]: Start isEmpty. Operand 17142 states and 19702 transitions. [2023-11-24 21:28:43,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2023-11-24 21:28:43,918 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:28:43,919 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:28:43,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 21:28:43,919 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:28:43,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:28:43,920 INFO L85 PathProgramCache]: Analyzing trace with hash 2049516963, now seen corresponding path program 1 times [2023-11-24 21:28:43,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:28:43,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621036157] [2023-11-24 21:28:43,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:28:43,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:28:44,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:28:44,472 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2023-11-24 21:28:44,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:28:44,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621036157] [2023-11-24 21:28:44,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621036157] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:28:44,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:28:44,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:28:44,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194274804] [2023-11-24 21:28:44,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:28:44,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:28:44,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:28:44,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:28:44,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:28:44,475 INFO L87 Difference]: Start difference. First operand 17142 states and 19702 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)