/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-20 14:49:07,854 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-20 14:49:07,921 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-20 14:49:07,926 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-20 14:49:07,926 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-20 14:49:07,948 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-20 14:49:07,948 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-20 14:49:07,948 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-20 14:49:07,949 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-20 14:49:07,952 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-20 14:49:07,952 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-20 14:49:07,952 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-20 14:49:07,953 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-20 14:49:07,954 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-20 14:49:07,954 INFO L153 SettingsManager]: * Use SBE=true [2023-12-20 14:49:07,954 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-20 14:49:07,954 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-20 14:49:07,954 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-20 14:49:07,954 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-20 14:49:07,955 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-20 14:49:07,955 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-20 14:49:07,955 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-20 14:49:07,955 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-20 14:49:07,955 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-20 14:49:07,955 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-20 14:49:07,956 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-20 14:49:07,956 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-20 14:49:07,956 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-20 14:49:07,956 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-20 14:49:07,957 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-20 14:49:07,957 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-20 14:49:07,957 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-20 14:49:07,957 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 14:49:07,958 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-20 14:49:07,958 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-20 14:49:07,958 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-20 14:49:07,958 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-20 14:49:07,958 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-20 14:49:07,958 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-20 14:49:07,958 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-20 14:49:07,958 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-20 14:49:07,959 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-20 14:49:07,959 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-20 14:49:07,959 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-20 14:49:08,116 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-20 14:49:08,136 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-20 14:49:08,137 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-20 14:49:08,138 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-20 14:49:08,139 INFO L274 PluginConnector]: CDTParser initialized [2023-12-20 14:49:08,139 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c [2023-12-20 14:49:09,285 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-20 14:49:09,456 INFO L384 CDTParser]: Found 1 translation units. [2023-12-20 14:49:09,458 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c [2023-12-20 14:49:09,472 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad335f6b9/19f85085709749708f7b0277fec70a90/FLAGb68a11c86 [2023-12-20 14:49:09,482 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad335f6b9/19f85085709749708f7b0277fec70a90 [2023-12-20 14:49:09,484 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-20 14:49:09,484 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-20 14:49:09,485 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-20 14:49:09,485 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-20 14:49:09,491 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-20 14:49:09,492 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 02:49:09" (1/1) ... [2023-12-20 14:49:09,493 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2318b58b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:49:09, skipping insertion in model container [2023-12-20 14:49:09,493 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 02:49:09" (1/1) ... [2023-12-20 14:49:09,544 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-20 14:49:09,653 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c[914,927] [2023-12-20 14:49:09,689 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c[7115,7128] [2023-12-20 14:49:09,743 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 14:49:09,755 INFO L202 MainTranslator]: Completed pre-run [2023-12-20 14:49:09,762 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c[914,927] [2023-12-20 14:49:09,773 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c[7115,7128] [2023-12-20 14:49:09,807 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 14:49:09,822 INFO L206 MainTranslator]: Completed translation [2023-12-20 14:49:09,822 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:49:09 WrapperNode [2023-12-20 14:49:09,822 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-20 14:49:09,823 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-20 14:49:09,823 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-20 14:49:09,823 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-20 14:49:09,828 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:49:09" (1/1) ... [2023-12-20 14:49:09,840 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:49:09" (1/1) ... [2023-12-20 14:49:09,886 INFO L138 Inliner]: procedures = 73, calls = 88, calls flagged for inlining = 41, calls inlined = 41, statements flattened = 954 [2023-12-20 14:49:09,889 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-20 14:49:09,889 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-20 14:49:09,890 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-20 14:49:09,890 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-20 14:49:09,910 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:49:09" (1/1) ... [2023-12-20 14:49:09,910 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:49:09" (1/1) ... [2023-12-20 14:49:09,913 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:49:09" (1/1) ... [2023-12-20 14:49:09,926 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]. [2023-12-20 14:49:09,926 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:49:09" (1/1) ... [2023-12-20 14:49:09,926 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:49:09" (1/1) ... [2023-12-20 14:49:09,935 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:49:09" (1/1) ... [2023-12-20 14:49:09,943 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:49:09" (1/1) ... [2023-12-20 14:49:09,945 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:49:09" (1/1) ... [2023-12-20 14:49:09,947 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:49:09" (1/1) ... [2023-12-20 14:49:09,950 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-20 14:49:09,951 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-20 14:49:09,951 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-20 14:49:09,951 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-20 14:49:09,952 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:49:09" (1/1) ... [2023-12-20 14:49:09,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 14:49:09,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 14:49:09,974 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-20 14:49:10,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-20 14:49:10,020 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-20 14:49:10,020 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-12-20 14:49:10,021 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-12-20 14:49:10,021 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2023-12-20 14:49:10,021 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2023-12-20 14:49:10,021 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-12-20 14:49:10,021 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-12-20 14:49:10,021 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-12-20 14:49:10,021 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-12-20 14:49:10,021 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2023-12-20 14:49:10,021 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2023-12-20 14:49:10,021 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-12-20 14:49:10,021 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-12-20 14:49:10,022 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-12-20 14:49:10,022 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-12-20 14:49:10,022 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2023-12-20 14:49:10,022 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2023-12-20 14:49:10,022 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2023-12-20 14:49:10,022 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2023-12-20 14:49:10,022 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2023-12-20 14:49:10,022 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2023-12-20 14:49:10,022 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-12-20 14:49:10,022 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-12-20 14:49:10,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-20 14:49:10,022 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-12-20 14:49:10,023 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-12-20 14:49:10,023 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2023-12-20 14:49:10,023 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2023-12-20 14:49:10,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-20 14:49:10,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-20 14:49:10,023 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-12-20 14:49:10,023 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-12-20 14:49:10,023 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2023-12-20 14:49:10,023 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2023-12-20 14:49:10,110 INFO L241 CfgBuilder]: Building ICFG [2023-12-20 14:49:10,112 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-20 14:49:10,751 INFO L282 CfgBuilder]: Performing block encoding [2023-12-20 14:49:10,836 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-20 14:49:10,837 INFO L309 CfgBuilder]: Removed 17 assume(true) statements. [2023-12-20 14:49:10,837 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 02:49:10 BoogieIcfgContainer [2023-12-20 14:49:10,837 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-20 14:49:10,839 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-20 14:49:10,839 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-20 14:49:10,841 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-20 14:49:10,841 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.12 02:49:09" (1/3) ... [2023-12-20 14:49:10,841 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c704c23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 02:49:10, skipping insertion in model container [2023-12-20 14:49:10,842 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:49:09" (2/3) ... [2023-12-20 14:49:10,842 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c704c23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 02:49:10, skipping insertion in model container [2023-12-20 14:49:10,842 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 02:49:10" (3/3) ... [2023-12-20 14:49:10,843 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.10.cil-1.c [2023-12-20 14:49:10,856 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-20 14:49:10,856 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-20 14:49:10,894 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-20 14:49:10,898 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;@56a60c1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-20 14:49:10,898 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-20 14:49:10,903 INFO L276 IsEmpty]: Start isEmpty. Operand has 401 states, 343 states have (on average 1.7113702623906706) internal successors, (587), 351 states have internal predecessors, (587), 40 states have call successors, (40), 15 states have call predecessors, (40), 15 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) [2023-12-20 14:49:10,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-20 14:49:10,911 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:49:10,912 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:49:10,912 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:49:10,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:49:10,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1105280806, now seen corresponding path program 1 times [2023-12-20 14:49:10,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:49:10,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665318927] [2023-12-20 14:49:10,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:49:10,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:49:11,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:11,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:49:11,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:11,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-20 14:49:11,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:11,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-20 14:49:11,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:11,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 14:49:11,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:11,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 14:49:11,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:11,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-20 14:49:11,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:11,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-12-20 14:49:11,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:11,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:49:11,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:49:11,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665318927] [2023-12-20 14:49:11,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665318927] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:49:11,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:49:11,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-20 14:49:11,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783010654] [2023-12-20 14:49:11,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:49:11,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-20 14:49:11,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:49:11,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-20 14:49:11,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-12-20 14:49:11,311 INFO L87 Difference]: Start difference. First operand has 401 states, 343 states have (on average 1.7113702623906706) internal successors, (587), 351 states have internal predecessors, (587), 40 states have call successors, (40), 15 states have call predecessors, (40), 15 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-20 14:49:12,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:49:12,320 INFO L93 Difference]: Finished difference Result 903 states and 1489 transitions. [2023-12-20 14:49:12,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-20 14:49:12,323 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 58 [2023-12-20 14:49:12,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:49:12,334 INFO L225 Difference]: With dead ends: 903 [2023-12-20 14:49:12,334 INFO L226 Difference]: Without dead ends: 520 [2023-12-20 14:49:12,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2023-12-20 14:49:12,341 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 1335 mSDsluCounter, 1043 mSDsCounter, 0 mSdLazyCounter, 1288 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1340 SdHoareTripleChecker+Valid, 1371 SdHoareTripleChecker+Invalid, 1523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 1288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-20 14:49:12,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1340 Valid, 1371 Invalid, 1523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 1288 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-20 14:49:12,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2023-12-20 14:49:12,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 483. [2023-12-20 14:49:12,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 408 states have (on average 1.5759803921568627) internal successors, (643), 415 states have internal predecessors, (643), 51 states have call successors, (51), 22 states have call predecessors, (51), 22 states have return successors, (52), 48 states have call predecessors, (52), 47 states have call successors, (52) [2023-12-20 14:49:12,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 746 transitions. [2023-12-20 14:49:12,402 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 746 transitions. Word has length 58 [2023-12-20 14:49:12,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:49:12,402 INFO L495 AbstractCegarLoop]: Abstraction has 483 states and 746 transitions. [2023-12-20 14:49:12,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-20 14:49:12,402 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 746 transitions. [2023-12-20 14:49:12,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-20 14:49:12,405 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:49:12,405 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:49:12,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-20 14:49:12,405 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:49:12,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:49:12,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1239514470, now seen corresponding path program 1 times [2023-12-20 14:49:12,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:49:12,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905523978] [2023-12-20 14:49:12,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:49:12,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:49:12,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:12,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:49:12,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:12,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-20 14:49:12,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:12,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-20 14:49:12,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:12,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 14:49:12,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:12,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 14:49:12,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:12,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-20 14:49:12,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:12,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-12-20 14:49:12,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:12,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:49:12,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:49:12,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905523978] [2023-12-20 14:49:12,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905523978] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:49:12,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:49:12,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-20 14:49:12,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200766646] [2023-12-20 14:49:12,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:49:12,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-20 14:49:12,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:49:12,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-20 14:49:12,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-20 14:49:12,560 INFO L87 Difference]: Start difference. First operand 483 states and 746 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-20 14:49:13,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:49:13,453 INFO L93 Difference]: Finished difference Result 803 states and 1196 transitions. [2023-12-20 14:49:13,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-20 14:49:13,457 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 58 [2023-12-20 14:49:13,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:49:13,462 INFO L225 Difference]: With dead ends: 803 [2023-12-20 14:49:13,462 INFO L226 Difference]: Without dead ends: 641 [2023-12-20 14:49:13,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2023-12-20 14:49:13,464 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 1474 mSDsluCounter, 1205 mSDsCounter, 0 mSdLazyCounter, 1602 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1502 SdHoareTripleChecker+Valid, 1558 SdHoareTripleChecker+Invalid, 1770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 1602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 14:49:13,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1502 Valid, 1558 Invalid, 1770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 1602 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 14:49:13,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2023-12-20 14:49:13,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 571. [2023-12-20 14:49:13,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 476 states have (on average 1.5525210084033614) internal successors, (739), 485 states have internal predecessors, (739), 62 states have call successors, (62), 29 states have call predecessors, (62), 31 states have return successors, (71), 60 states have call predecessors, (71), 58 states have call successors, (71) [2023-12-20 14:49:13,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 872 transitions. [2023-12-20 14:49:13,515 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 872 transitions. Word has length 58 [2023-12-20 14:49:13,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:49:13,515 INFO L495 AbstractCegarLoop]: Abstraction has 571 states and 872 transitions. [2023-12-20 14:49:13,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-20 14:49:13,516 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 872 transitions. [2023-12-20 14:49:13,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-20 14:49:13,520 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:49:13,521 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:49:13,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-20 14:49:13,521 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:49:13,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:49:13,522 INFO L85 PathProgramCache]: Analyzing trace with hash 688758232, now seen corresponding path program 1 times [2023-12-20 14:49:13,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:49:13,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401892560] [2023-12-20 14:49:13,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:49:13,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:49:13,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:13,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:49:13,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:13,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-20 14:49:13,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:13,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-20 14:49:13,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:13,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 14:49:13,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:13,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 14:49:13,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:13,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-20 14:49:13,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:13,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-12-20 14:49:13,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:13,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:49:13,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:49:13,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401892560] [2023-12-20 14:49:13,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401892560] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:49:13,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:49:13,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-20 14:49:13,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766055938] [2023-12-20 14:49:13,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:49:13,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-20 14:49:13,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:49:13,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-20 14:49:13,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-12-20 14:49:13,732 INFO L87 Difference]: Start difference. First operand 571 states and 872 transitions. Second operand has 9 states, 8 states have (on average 5.375) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-20 14:49:14,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:49:14,617 INFO L93 Difference]: Finished difference Result 847 states and 1261 transitions. [2023-12-20 14:49:14,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-20 14:49:14,618 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.375) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 58 [2023-12-20 14:49:14,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:49:14,621 INFO L225 Difference]: With dead ends: 847 [2023-12-20 14:49:14,621 INFO L226 Difference]: Without dead ends: 603 [2023-12-20 14:49:14,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-12-20 14:49:14,624 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 543 mSDsluCounter, 1898 mSDsCounter, 0 mSdLazyCounter, 1935 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 2225 SdHoareTripleChecker+Invalid, 2024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 14:49:14,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [544 Valid, 2225 Invalid, 2024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1935 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 14:49:14,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2023-12-20 14:49:14,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 575. [2023-12-20 14:49:14,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 479 states have (on average 1.5448851774530272) internal successors, (740), 488 states have internal predecessors, (740), 62 states have call successors, (62), 29 states have call predecessors, (62), 32 states have return successors, (72), 61 states have call predecessors, (72), 58 states have call successors, (72) [2023-12-20 14:49:14,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 874 transitions. [2023-12-20 14:49:14,647 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 874 transitions. Word has length 58 [2023-12-20 14:49:14,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:49:14,647 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 874 transitions. [2023-12-20 14:49:14,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.375) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-20 14:49:14,647 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 874 transitions. [2023-12-20 14:49:14,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-20 14:49:14,648 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:49:14,648 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:49:14,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-20 14:49:14,648 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:49:14,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:49:14,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1555225066, now seen corresponding path program 1 times [2023-12-20 14:49:14,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:49:14,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215912518] [2023-12-20 14:49:14,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:49:14,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:49:14,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:14,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:49:14,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:14,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-20 14:49:14,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:14,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-20 14:49:14,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:14,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 14:49:14,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:14,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 14:49:14,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:14,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-20 14:49:14,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:14,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-12-20 14:49:14,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:14,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:49:14,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:49:14,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215912518] [2023-12-20 14:49:14,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215912518] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:49:14,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:49:14,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-20 14:49:14,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975456552] [2023-12-20 14:49:14,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:49:14,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-20 14:49:14,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:49:14,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-20 14:49:14,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-12-20 14:49:14,738 INFO L87 Difference]: Start difference. First operand 575 states and 874 transitions. Second operand has 9 states, 8 states have (on average 5.375) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-20 14:49:15,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:49:15,635 INFO L93 Difference]: Finished difference Result 865 states and 1279 transitions. [2023-12-20 14:49:15,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-20 14:49:15,636 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.375) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 58 [2023-12-20 14:49:15,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:49:15,638 INFO L225 Difference]: With dead ends: 865 [2023-12-20 14:49:15,638 INFO L226 Difference]: Without dead ends: 617 [2023-12-20 14:49:15,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2023-12-20 14:49:15,639 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 544 mSDsluCounter, 1898 mSDsCounter, 0 mSdLazyCounter, 1925 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 2224 SdHoareTripleChecker+Invalid, 2014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 14:49:15,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [546 Valid, 2224 Invalid, 2014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1925 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 14:49:15,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2023-12-20 14:49:15,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 587. [2023-12-20 14:49:15,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 488 states have (on average 1.5348360655737705) internal successors, (749), 497 states have internal predecessors, (749), 62 states have call successors, (62), 29 states have call predecessors, (62), 35 states have return successors, (75), 64 states have call predecessors, (75), 58 states have call successors, (75) [2023-12-20 14:49:15,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 886 transitions. [2023-12-20 14:49:15,660 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 886 transitions. Word has length 58 [2023-12-20 14:49:15,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:49:15,661 INFO L495 AbstractCegarLoop]: Abstraction has 587 states and 886 transitions. [2023-12-20 14:49:15,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.375) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-20 14:49:15,661 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 886 transitions. [2023-12-20 14:49:15,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-20 14:49:15,662 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:49:15,662 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:49:15,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-20 14:49:15,662 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:49:15,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:49:15,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1493185452, now seen corresponding path program 1 times [2023-12-20 14:49:15,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:49:15,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120330293] [2023-12-20 14:49:15,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:49:15,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:49:15,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:15,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:49:15,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:15,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-20 14:49:15,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:15,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-20 14:49:15,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:15,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 14:49:15,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:15,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 14:49:15,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:15,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-20 14:49:15,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:15,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-12-20 14:49:15,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:15,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:49:15,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:49:15,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120330293] [2023-12-20 14:49:15,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120330293] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:49:15,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:49:15,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-20 14:49:15,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560577399] [2023-12-20 14:49:15,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:49:15,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-20 14:49:15,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:49:15,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-20 14:49:15,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-20 14:49:15,786 INFO L87 Difference]: Start difference. First operand 587 states and 886 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-20 14:49:16,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:49:16,789 INFO L93 Difference]: Finished difference Result 943 states and 1361 transitions. [2023-12-20 14:49:16,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-20 14:49:16,790 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 58 [2023-12-20 14:49:16,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:49:16,792 INFO L225 Difference]: With dead ends: 943 [2023-12-20 14:49:16,792 INFO L226 Difference]: Without dead ends: 685 [2023-12-20 14:49:16,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2023-12-20 14:49:16,793 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 1504 mSDsluCounter, 1077 mSDsCounter, 0 mSdLazyCounter, 1495 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1533 SdHoareTripleChecker+Valid, 1392 SdHoareTripleChecker+Invalid, 1681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 1495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-20 14:49:16,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1533 Valid, 1392 Invalid, 1681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 1495 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-20 14:49:16,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2023-12-20 14:49:16,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 597. [2023-12-20 14:49:16,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 496 states have (on average 1.5262096774193548) internal successors, (757), 505 states have internal predecessors, (757), 63 states have call successors, (63), 30 states have call predecessors, (63), 36 states have return successors, (74), 65 states have call predecessors, (74), 59 states have call successors, (74) [2023-12-20 14:49:16,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 894 transitions. [2023-12-20 14:49:16,810 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 894 transitions. Word has length 58 [2023-12-20 14:49:16,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:49:16,810 INFO L495 AbstractCegarLoop]: Abstraction has 597 states and 894 transitions. [2023-12-20 14:49:16,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-20 14:49:16,810 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 894 transitions. [2023-12-20 14:49:16,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-20 14:49:16,811 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:49:16,811 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:49:16,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-20 14:49:16,811 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:49:16,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:49:16,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1070483626, now seen corresponding path program 1 times [2023-12-20 14:49:16,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:49:16,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206684920] [2023-12-20 14:49:16,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:49:16,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:49:16,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:16,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:49:16,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:16,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-20 14:49:16,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:16,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-20 14:49:16,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:16,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 14:49:16,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:16,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 14:49:16,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:16,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-20 14:49:16,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:16,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-12-20 14:49:16,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:16,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:49:16,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:49:16,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206684920] [2023-12-20 14:49:16,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206684920] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:49:16,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:49:16,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:49:16,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210823598] [2023-12-20 14:49:16,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:49:16,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:49:16,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:49:16,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:49:16,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:49:16,875 INFO L87 Difference]: Start difference. First operand 597 states and 894 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 4 states have internal predecessors, (43), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-20 14:49:17,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:49:17,535 INFO L93 Difference]: Finished difference Result 1179 states and 1681 transitions. [2023-12-20 14:49:17,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-20 14:49:17,536 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 4 states have internal predecessors, (43), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 58 [2023-12-20 14:49:17,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:49:17,539 INFO L225 Difference]: With dead ends: 1179 [2023-12-20 14:49:17,539 INFO L226 Difference]: Without dead ends: 912 [2023-12-20 14:49:17,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2023-12-20 14:49:17,541 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 1487 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1517 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 14:49:17,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1517 Valid, 1092 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 14:49:17,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2023-12-20 14:49:17,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 858. [2023-12-20 14:49:17,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 691 states have (on average 1.4688856729377713) internal successors, (1015), 707 states have internal predecessors, (1015), 98 states have call successors, (98), 52 states have call predecessors, (98), 67 states have return successors, (131), 105 states have call predecessors, (131), 94 states have call successors, (131) [2023-12-20 14:49:17,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 1244 transitions. [2023-12-20 14:49:17,567 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 1244 transitions. Word has length 58 [2023-12-20 14:49:17,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:49:17,567 INFO L495 AbstractCegarLoop]: Abstraction has 858 states and 1244 transitions. [2023-12-20 14:49:17,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 4 states have internal predecessors, (43), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-20 14:49:17,568 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 1244 transitions. [2023-12-20 14:49:17,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-12-20 14:49:17,569 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:49:17,569 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:49:17,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-20 14:49:17,569 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:49:17,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:49:17,570 INFO L85 PathProgramCache]: Analyzing trace with hash -602571652, now seen corresponding path program 1 times [2023-12-20 14:49:17,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:49:17,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639770032] [2023-12-20 14:49:17,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:49:17,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:49:17,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:17,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:49:17,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:17,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-20 14:49:17,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:17,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-20 14:49:17,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:17,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 14:49:17,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:17,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 14:49:17,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:17,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-20 14:49:17,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:17,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-12-20 14:49:17,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:17,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:49:17,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:49:17,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639770032] [2023-12-20 14:49:17,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639770032] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:49:17,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:49:17,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-20 14:49:17,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671007137] [2023-12-20 14:49:17,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:49:17,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-20 14:49:17,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:49:17,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-20 14:49:17,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-20 14:49:17,621 INFO L87 Difference]: Start difference. First operand 858 states and 1244 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-20 14:49:18,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:49:18,259 INFO L93 Difference]: Finished difference Result 1942 states and 2690 transitions. [2023-12-20 14:49:18,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-20 14:49:18,260 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 59 [2023-12-20 14:49:18,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:49:18,265 INFO L225 Difference]: With dead ends: 1942 [2023-12-20 14:49:18,265 INFO L226 Difference]: Without dead ends: 1423 [2023-12-20 14:49:18,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2023-12-20 14:49:18,266 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 1189 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1222 SdHoareTripleChecker+Valid, 1131 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 14:49:18,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1222 Valid, 1131 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 14:49:18,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2023-12-20 14:49:18,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 1269. [2023-12-20 14:49:18,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1269 states, 1002 states have (on average 1.4121756487025947) internal successors, (1415), 1025 states have internal predecessors, (1415), 147 states have call successors, (147), 94 states have call predecessors, (147), 118 states have return successors, (201), 156 states have call predecessors, (201), 143 states have call successors, (201) [2023-12-20 14:49:18,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 1763 transitions. [2023-12-20 14:49:18,306 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 1763 transitions. Word has length 59 [2023-12-20 14:49:18,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:49:18,306 INFO L495 AbstractCegarLoop]: Abstraction has 1269 states and 1763 transitions. [2023-12-20 14:49:18,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-20 14:49:18,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 1763 transitions. [2023-12-20 14:49:18,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-20 14:49:18,308 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:49:18,308 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:49:18,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-20 14:49:18,308 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:49:18,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:49:18,309 INFO L85 PathProgramCache]: Analyzing trace with hash 363136743, now seen corresponding path program 1 times [2023-12-20 14:49:18,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:49:18,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915287708] [2023-12-20 14:49:18,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:49:18,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:49:18,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:18,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:49:18,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:18,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-20 14:49:18,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:18,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-20 14:49:18,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:18,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 14:49:18,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:18,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 14:49:18,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:18,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-20 14:49:18,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:18,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-12-20 14:49:18,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:18,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:49:18,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:49:18,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915287708] [2023-12-20 14:49:18,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915287708] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:49:18,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:49:18,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-20 14:49:18,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302966916] [2023-12-20 14:49:18,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:49:18,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-20 14:49:18,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:49:18,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-20 14:49:18,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-20 14:49:18,386 INFO L87 Difference]: Start difference. First operand 1269 states and 1763 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-20 14:49:18,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:49:18,991 INFO L93 Difference]: Finished difference Result 3229 states and 4326 transitions. [2023-12-20 14:49:18,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-20 14:49:18,991 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 60 [2023-12-20 14:49:18,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:49:18,999 INFO L225 Difference]: With dead ends: 3229 [2023-12-20 14:49:19,000 INFO L226 Difference]: Without dead ends: 2269 [2023-12-20 14:49:19,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-12-20 14:49:19,006 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 718 mSDsluCounter, 1005 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 726 SdHoareTripleChecker+Valid, 1328 SdHoareTripleChecker+Invalid, 1012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 14:49:19,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [726 Valid, 1328 Invalid, 1012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 14:49:19,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2269 states. [2023-12-20 14:49:19,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2269 to 2085. [2023-12-20 14:49:19,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2085 states, 1620 states have (on average 1.3623456790123456) internal successors, (2207), 1649 states have internal predecessors, (2207), 241 states have call successors, (241), 180 states have call predecessors, (241), 222 states have return successors, (339), 262 states have call predecessors, (339), 237 states have call successors, (339) [2023-12-20 14:49:19,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2085 states to 2085 states and 2787 transitions. [2023-12-20 14:49:19,126 INFO L78 Accepts]: Start accepts. Automaton has 2085 states and 2787 transitions. Word has length 60 [2023-12-20 14:49:19,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:49:19,127 INFO L495 AbstractCegarLoop]: Abstraction has 2085 states and 2787 transitions. [2023-12-20 14:49:19,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-20 14:49:19,127 INFO L276 IsEmpty]: Start isEmpty. Operand 2085 states and 2787 transitions. [2023-12-20 14:49:19,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-12-20 14:49:19,129 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:49:19,130 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:49:19,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-20 14:49:19,130 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:49:19,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:49:19,130 INFO L85 PathProgramCache]: Analyzing trace with hash 952697062, now seen corresponding path program 1 times [2023-12-20 14:49:19,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:49:19,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153648798] [2023-12-20 14:49:19,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:49:19,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:49:19,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:19,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:49:19,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:19,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-20 14:49:19,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:19,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-20 14:49:19,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:19,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 14:49:19,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:19,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 14:49:19,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:19,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-20 14:49:19,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:19,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-12-20 14:49:19,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:19,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:49:19,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:49:19,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153648798] [2023-12-20 14:49:19,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153648798] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:49:19,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:49:19,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-20 14:49:19,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526820330] [2023-12-20 14:49:19,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:49:19,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-20 14:49:19,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:49:19,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-20 14:49:19,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-20 14:49:19,188 INFO L87 Difference]: Start difference. First operand 2085 states and 2787 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-20 14:49:19,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:49:19,715 INFO L93 Difference]: Finished difference Result 4749 states and 6191 transitions. [2023-12-20 14:49:19,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-20 14:49:19,715 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2023-12-20 14:49:19,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:49:19,726 INFO L225 Difference]: With dead ends: 4749 [2023-12-20 14:49:19,726 INFO L226 Difference]: Without dead ends: 2993 [2023-12-20 14:49:19,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-12-20 14:49:19,731 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 1473 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1504 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 14:49:19,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1504 Valid, 886 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 14:49:19,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2993 states. [2023-12-20 14:49:19,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2993 to 2751. [2023-12-20 14:49:19,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2751 states, 2122 states have (on average 1.3407163053722904) internal successors, (2845), 2159 states have internal predecessors, (2845), 321 states have call successors, (321), 250 states have call predecessors, (321), 306 states have return successors, (448), 348 states have call predecessors, (448), 317 states have call successors, (448) [2023-12-20 14:49:19,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2751 states to 2751 states and 3614 transitions. [2023-12-20 14:49:19,914 INFO L78 Accepts]: Start accepts. Automaton has 2751 states and 3614 transitions. Word has length 66 [2023-12-20 14:49:19,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:49:19,914 INFO L495 AbstractCegarLoop]: Abstraction has 2751 states and 3614 transitions. [2023-12-20 14:49:19,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-20 14:49:19,915 INFO L276 IsEmpty]: Start isEmpty. Operand 2751 states and 3614 transitions. [2023-12-20 14:49:19,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-20 14:49:19,919 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:49:19,919 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-20 14:49:19,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-20 14:49:19,919 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:49:19,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:49:19,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1047983509, now seen corresponding path program 1 times [2023-12-20 14:49:19,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:49:19,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138296068] [2023-12-20 14:49:19,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:49:19,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:49:19,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:19,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:49:19,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:19,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-20 14:49:19,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:19,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-20 14:49:19,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:19,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 14:49:19,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:19,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 14:49:19,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:19,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-20 14:49:19,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:19,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-12-20 14:49:19,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:19,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:49:19,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:49:19,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138296068] [2023-12-20 14:49:19,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138296068] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:49:19,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:49:19,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:49:19,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568241357] [2023-12-20 14:49:19,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:49:19,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:49:19,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:49:19,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:49:19,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:49:19,990 INFO L87 Difference]: Start difference. First operand 2751 states and 3614 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-12-20 14:49:20,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:49:20,656 INFO L93 Difference]: Finished difference Result 3471 states and 4491 transitions. [2023-12-20 14:49:20,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-20 14:49:20,656 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 67 [2023-12-20 14:49:20,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:49:20,666 INFO L225 Difference]: With dead ends: 3471 [2023-12-20 14:49:20,666 INFO L226 Difference]: Without dead ends: 3468 [2023-12-20 14:49:20,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2023-12-20 14:49:20,667 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 1776 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1786 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 14:49:20,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1786 Valid, 1117 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 14:49:20,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3468 states. [2023-12-20 14:49:20,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3468 to 3201. [2023-12-20 14:49:20,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3201 states, 2463 states have (on average 1.3288672350791717) internal successors, (3273), 2505 states have internal predecessors, (3273), 371 states have call successors, (371), 294 states have call predecessors, (371), 365 states have return successors, (527), 408 states have call predecessors, (527), 368 states have call successors, (527) [2023-12-20 14:49:20,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3201 states to 3201 states and 4171 transitions. [2023-12-20 14:49:20,798 INFO L78 Accepts]: Start accepts. Automaton has 3201 states and 4171 transitions. Word has length 67 [2023-12-20 14:49:20,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:49:20,798 INFO L495 AbstractCegarLoop]: Abstraction has 3201 states and 4171 transitions. [2023-12-20 14:49:20,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-12-20 14:49:20,799 INFO L276 IsEmpty]: Start isEmpty. Operand 3201 states and 4171 transitions. [2023-12-20 14:49:20,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-20 14:49:20,800 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:49:20,800 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-20 14:49:20,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-20 14:49:20,800 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:49:20,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:49:20,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1870924240, now seen corresponding path program 1 times [2023-12-20 14:49:20,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:49:20,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747140143] [2023-12-20 14:49:20,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:49:20,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:49:20,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:20,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:49:20,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:20,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-20 14:49:20,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:20,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-20 14:49:20,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:20,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 14:49:20,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:20,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 14:49:20,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:20,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-20 14:49:20,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:20,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-12-20 14:49:20,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:20,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:49:20,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:49:20,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747140143] [2023-12-20 14:49:20,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747140143] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 14:49:20,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505431685] [2023-12-20 14:49:20,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:49:20,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 14:49:20,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 14:49:20,926 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 14:49:20,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-20 14:49:21,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:21,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-20 14:49:21,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 14:49:21,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:49:21,212 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 14:49:21,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:49:21,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505431685] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 14:49:21,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 14:49:21,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 10 [2023-12-20 14:49:21,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112285474] [2023-12-20 14:49:21,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 14:49:21,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-20 14:49:21,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:49:21,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-20 14:49:21,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-12-20 14:49:21,279 INFO L87 Difference]: Start difference. First operand 3201 states and 4171 transitions. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 7 states have internal predecessors, (109), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2023-12-20 14:49:22,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:49:22,729 INFO L93 Difference]: Finished difference Result 7268 states and 9283 transitions. [2023-12-20 14:49:22,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-20 14:49:22,731 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 7 states have internal predecessors, (109), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 68 [2023-12-20 14:49:22,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:49:22,751 INFO L225 Difference]: With dead ends: 7268 [2023-12-20 14:49:22,751 INFO L226 Difference]: Without dead ends: 7265 [2023-12-20 14:49:22,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2023-12-20 14:49:22,753 INFO L413 NwaCegarLoop]: 402 mSDtfsCounter, 1591 mSDsluCounter, 1878 mSDsCounter, 0 mSdLazyCounter, 2421 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1661 SdHoareTripleChecker+Valid, 2280 SdHoareTripleChecker+Invalid, 2575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 2421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-20 14:49:22,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1661 Valid, 2280 Invalid, 2575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 2421 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-20 14:49:22,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7265 states. [2023-12-20 14:49:22,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7265 to 4827. [2023-12-20 14:49:22,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4827 states, 3703 states have (on average 1.3192006481231433) internal successors, (4885), 3767 states have internal predecessors, (4885), 555 states have call successors, (555), 452 states have call predecessors, (555), 567 states have return successors, (805), 614 states have call predecessors, (805), 552 states have call successors, (805) [2023-12-20 14:49:23,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4827 states to 4827 states and 6245 transitions. [2023-12-20 14:49:23,009 INFO L78 Accepts]: Start accepts. Automaton has 4827 states and 6245 transitions. Word has length 68 [2023-12-20 14:49:23,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:49:23,009 INFO L495 AbstractCegarLoop]: Abstraction has 4827 states and 6245 transitions. [2023-12-20 14:49:23,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 7 states have internal predecessors, (109), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2023-12-20 14:49:23,010 INFO L276 IsEmpty]: Start isEmpty. Operand 4827 states and 6245 transitions. [2023-12-20 14:49:23,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-12-20 14:49:23,011 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:49:23,011 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-12-20 14:49:23,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-20 14:49:23,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-20 14:49:23,217 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:49:23,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:49:23,217 INFO L85 PathProgramCache]: Analyzing trace with hash -600934869, now seen corresponding path program 2 times [2023-12-20 14:49:23,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:49:23,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293768375] [2023-12-20 14:49:23,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:49:23,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:49:23,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:23,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:49:23,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:23,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-20 14:49:23,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:23,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-20 14:49:23,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:23,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 14:49:23,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:23,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 14:49:23,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:23,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-20 14:49:23,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:23,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-12-20 14:49:23,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:23,273 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:49:23,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:49:23,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293768375] [2023-12-20 14:49:23,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293768375] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:49:23,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:49:23,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-20 14:49:23,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763132221] [2023-12-20 14:49:23,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:49:23,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-20 14:49:23,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:49:23,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-20 14:49:23,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-20 14:49:23,275 INFO L87 Difference]: Start difference. First operand 4827 states and 6245 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-12-20 14:49:23,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:49:23,902 INFO L93 Difference]: Finished difference Result 7283 states and 9392 transitions. [2023-12-20 14:49:23,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-20 14:49:23,902 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 71 [2023-12-20 14:49:23,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:49:23,912 INFO L225 Difference]: With dead ends: 7283 [2023-12-20 14:49:23,912 INFO L226 Difference]: Without dead ends: 3580 [2023-12-20 14:49:23,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-12-20 14:49:23,918 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 1370 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1404 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 14:49:23,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1404 Valid, 940 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 14:49:23,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3580 states. [2023-12-20 14:49:24,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3580 to 3351. [2023-12-20 14:49:24,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3351 states, 2583 states have (on average 1.3073945025164537) internal successors, (3377), 2625 states have internal predecessors, (3377), 387 states have call successors, (387), 308 states have call predecessors, (387), 379 states have return successors, (531), 424 states have call predecessors, (531), 384 states have call successors, (531) [2023-12-20 14:49:24,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3351 states to 3351 states and 4295 transitions. [2023-12-20 14:49:24,100 INFO L78 Accepts]: Start accepts. Automaton has 3351 states and 4295 transitions. Word has length 71 [2023-12-20 14:49:24,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:49:24,101 INFO L495 AbstractCegarLoop]: Abstraction has 3351 states and 4295 transitions. [2023-12-20 14:49:24,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-12-20 14:49:24,101 INFO L276 IsEmpty]: Start isEmpty. Operand 3351 states and 4295 transitions. [2023-12-20 14:49:24,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-20 14:49:24,103 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:49:24,103 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-20 14:49:24,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-20 14:49:24,103 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:49:24,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:49:24,103 INFO L85 PathProgramCache]: Analyzing trace with hash -392745723, now seen corresponding path program 1 times [2023-12-20 14:49:24,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:49:24,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963292220] [2023-12-20 14:49:24,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:49:24,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:49:24,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:24,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:49:24,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:24,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-20 14:49:24,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:24,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-20 14:49:24,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:24,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 14:49:24,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:24,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 14:49:24,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:24,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-20 14:49:24,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:24,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-12-20 14:49:24,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:24,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-12-20 14:49:24,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:24,175 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 14:49:24,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:49:24,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963292220] [2023-12-20 14:49:24,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963292220] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:49:24,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:49:24,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-20 14:49:24,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652463678] [2023-12-20 14:49:24,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:49:24,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-20 14:49:24,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:49:24,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-20 14:49:24,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-12-20 14:49:24,177 INFO L87 Difference]: Start difference. First operand 3351 states and 4295 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-20 14:49:25,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:49:25,252 INFO L93 Difference]: Finished difference Result 9649 states and 12138 transitions. [2023-12-20 14:49:25,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-20 14:49:25,252 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 76 [2023-12-20 14:49:25,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:49:25,282 INFO L225 Difference]: With dead ends: 9649 [2023-12-20 14:49:25,282 INFO L226 Difference]: Without dead ends: 5412 [2023-12-20 14:49:25,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2023-12-20 14:49:25,290 INFO L413 NwaCegarLoop]: 339 mSDtfsCounter, 928 mSDsluCounter, 1380 mSDsCounter, 0 mSdLazyCounter, 1462 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 943 SdHoareTripleChecker+Valid, 1719 SdHoareTripleChecker+Invalid, 1647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 1462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 14:49:25,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [943 Valid, 1719 Invalid, 1647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 1462 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 14:49:25,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5412 states. [2023-12-20 14:49:25,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5412 to 5092. [2023-12-20 14:49:25,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5092 states, 3867 states have (on average 1.273855702094647) internal successors, (4926), 3952 states have internal predecessors, (4926), 591 states have call successors, (591), 482 states have call predecessors, (591), 632 states have return successors, (913), 664 states have call predecessors, (913), 588 states have call successors, (913) [2023-12-20 14:49:25,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5092 states to 5092 states and 6430 transitions. [2023-12-20 14:49:25,580 INFO L78 Accepts]: Start accepts. Automaton has 5092 states and 6430 transitions. Word has length 76 [2023-12-20 14:49:25,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:49:25,580 INFO L495 AbstractCegarLoop]: Abstraction has 5092 states and 6430 transitions. [2023-12-20 14:49:25,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-20 14:49:25,580 INFO L276 IsEmpty]: Start isEmpty. Operand 5092 states and 6430 transitions. [2023-12-20 14:49:25,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-12-20 14:49:25,583 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:49:25,583 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-12-20 14:49:25,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-20 14:49:25,583 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:49:25,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:49:25,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1057621740, now seen corresponding path program 1 times [2023-12-20 14:49:25,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:49:25,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303558715] [2023-12-20 14:49:25,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:49:25,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:49:25,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:25,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:49:25,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:25,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-20 14:49:25,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:25,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-20 14:49:25,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:25,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 14:49:25,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:25,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 14:49:25,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:25,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-20 14:49:25,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:25,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-12-20 14:49:25,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:25,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-12-20 14:49:25,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:25,672 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 14:49:25,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:49:25,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303558715] [2023-12-20 14:49:25,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303558715] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:49:25,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:49:25,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-20 14:49:25,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677695166] [2023-12-20 14:49:25,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:49:25,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-20 14:49:25,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:49:25,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-20 14:49:25,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-12-20 14:49:25,674 INFO L87 Difference]: Start difference. First operand 5092 states and 6430 transitions. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 6 states have internal predecessors, (67), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-20 14:49:26,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:49:26,848 INFO L93 Difference]: Finished difference Result 8763 states and 10938 transitions. [2023-12-20 14:49:26,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-20 14:49:26,848 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 6 states have internal predecessors, (67), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 86 [2023-12-20 14:49:26,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:49:26,867 INFO L225 Difference]: With dead ends: 8763 [2023-12-20 14:49:26,867 INFO L226 Difference]: Without dead ends: 4583 [2023-12-20 14:49:26,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2023-12-20 14:49:26,875 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 2098 mSDsluCounter, 1131 mSDsCounter, 0 mSdLazyCounter, 1542 mSolverCounterSat, 388 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2142 SdHoareTripleChecker+Valid, 1454 SdHoareTripleChecker+Invalid, 1930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 388 IncrementalHoareTripleChecker+Valid, 1542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-20 14:49:26,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2142 Valid, 1454 Invalid, 1930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [388 Valid, 1542 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-20 14:49:26,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4583 states. [2023-12-20 14:49:27,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4583 to 4249. [2023-12-20 14:49:27,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4249 states, 3237 states have (on average 1.2684584491813407) internal successors, (4106), 3304 states have internal predecessors, (4106), 492 states have call successors, (492), 397 states have call predecessors, (492), 518 states have return successors, (691), 554 states have call predecessors, (691), 489 states have call successors, (691) [2023-12-20 14:49:27,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4249 states to 4249 states and 5289 transitions. [2023-12-20 14:49:27,119 INFO L78 Accepts]: Start accepts. Automaton has 4249 states and 5289 transitions. Word has length 86 [2023-12-20 14:49:27,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:49:27,120 INFO L495 AbstractCegarLoop]: Abstraction has 4249 states and 5289 transitions. [2023-12-20 14:49:27,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 6 states have internal predecessors, (67), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-20 14:49:27,120 INFO L276 IsEmpty]: Start isEmpty. Operand 4249 states and 5289 transitions. [2023-12-20 14:49:27,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-12-20 14:49:27,124 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:49:27,124 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:49:27,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-20 14:49:27,124 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:49:27,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:49:27,124 INFO L85 PathProgramCache]: Analyzing trace with hash 702791445, now seen corresponding path program 1 times [2023-12-20 14:49:27,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:49:27,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110539922] [2023-12-20 14:49:27,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:49:27,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:49:27,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:27,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:49:27,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:27,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-20 14:49:27,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:27,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-20 14:49:27,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:27,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 14:49:27,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:27,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 14:49:27,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:27,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-20 14:49:27,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:27,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-12-20 14:49:27,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:27,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-12-20 14:49:27,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:27,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-12-20 14:49:27,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:27,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-12-20 14:49:27,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:27,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2023-12-20 14:49:27,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:27,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 14:49:27,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:27,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 14:49:27,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:27,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2023-12-20 14:49:27,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:27,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2023-12-20 14:49:27,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:27,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2023-12-20 14:49:27,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:27,250 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-12-20 14:49:27,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:49:27,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110539922] [2023-12-20 14:49:27,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110539922] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 14:49:27,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688740883] [2023-12-20 14:49:27,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:49:27,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 14:49:27,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 14:49:27,269 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 14:49:27,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-20 14:49:27,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:27,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-20 14:49:27,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 14:49:27,449 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-20 14:49:27,449 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 14:49:27,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688740883] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:49:27,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 14:49:27,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 12 [2023-12-20 14:49:27,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833882147] [2023-12-20 14:49:27,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:49:27,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-20 14:49:27,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:49:27,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-20 14:49:27,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-12-20 14:49:27,452 INFO L87 Difference]: Start difference. First operand 4249 states and 5289 transitions. Second operand has 6 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2023-12-20 14:49:27,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:49:27,653 INFO L93 Difference]: Finished difference Result 6221 states and 7718 transitions. [2023-12-20 14:49:27,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-20 14:49:27,654 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 131 [2023-12-20 14:49:27,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:49:27,657 INFO L225 Difference]: With dead ends: 6221 [2023-12-20 14:49:27,658 INFO L226 Difference]: Without dead ends: 2305 [2023-12-20 14:49:27,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-12-20 14:49:27,662 INFO L413 NwaCegarLoop]: 574 mSDtfsCounter, 32 mSDsluCounter, 2260 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 2834 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 14:49:27,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 2834 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 14:49:27,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2305 states. [2023-12-20 14:49:27,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2305 to 2180. [2023-12-20 14:49:27,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2180 states, 1745 states have (on average 1.287679083094556) internal successors, (2247), 1761 states have internal predecessors, (2247), 216 states have call successors, (216), 163 states have call predecessors, (216), 217 states have return successors, (298), 256 states have call predecessors, (298), 213 states have call successors, (298) [2023-12-20 14:49:27,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2180 states to 2180 states and 2761 transitions. [2023-12-20 14:49:27,750 INFO L78 Accepts]: Start accepts. Automaton has 2180 states and 2761 transitions. Word has length 131 [2023-12-20 14:49:27,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:49:27,751 INFO L495 AbstractCegarLoop]: Abstraction has 2180 states and 2761 transitions. [2023-12-20 14:49:27,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2023-12-20 14:49:27,751 INFO L276 IsEmpty]: Start isEmpty. Operand 2180 states and 2761 transitions. [2023-12-20 14:49:27,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-12-20 14:49:27,754 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:49:27,754 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:49:27,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-20 14:49:27,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-20 14:49:27,962 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:49:27,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:49:27,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1600186653, now seen corresponding path program 1 times [2023-12-20 14:49:27,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:49:27,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255420064] [2023-12-20 14:49:27,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:49:27,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:49:27,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:28,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:49:28,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:28,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-20 14:49:28,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:28,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-20 14:49:28,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:28,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 14:49:28,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:28,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 14:49:28,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:28,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-20 14:49:28,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:28,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-12-20 14:49:28,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:28,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-12-20 14:49:28,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:28,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-12-20 14:49:28,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:28,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2023-12-20 14:49:28,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:28,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-12-20 14:49:28,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:28,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 14:49:28,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:28,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 14:49:28,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:28,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2023-12-20 14:49:28,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:28,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2023-12-20 14:49:28,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:28,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2023-12-20 14:49:28,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:28,040 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-12-20 14:49:28,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:49:28,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255420064] [2023-12-20 14:49:28,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255420064] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:49:28,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:49:28,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-20 14:49:28,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053946413] [2023-12-20 14:49:28,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:49:28,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-20 14:49:28,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:49:28,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-20 14:49:28,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-20 14:49:28,041 INFO L87 Difference]: Start difference. First operand 2180 states and 2761 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-12-20 14:49:28,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:49:28,663 INFO L93 Difference]: Finished difference Result 2245 states and 2829 transitions. [2023-12-20 14:49:28,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-20 14:49:28,664 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 133 [2023-12-20 14:49:28,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:49:28,668 INFO L225 Difference]: With dead ends: 2245 [2023-12-20 14:49:28,668 INFO L226 Difference]: Without dead ends: 1843 [2023-12-20 14:49:28,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-12-20 14:49:28,669 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 639 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 1281 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 14:49:28,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [654 Valid, 1281 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 14:49:28,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1843 states. [2023-12-20 14:49:28,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1843 to 1781. [2023-12-20 14:49:28,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1781 states, 1442 states have (on average 1.3065187239944522) internal successors, (1884), 1455 states have internal predecessors, (1884), 170 states have call successors, (170), 123 states have call predecessors, (170), 167 states have return successors, (234), 203 states have call predecessors, (234), 167 states have call successors, (234) [2023-12-20 14:49:28,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1781 states to 1781 states and 2288 transitions. [2023-12-20 14:49:28,737 INFO L78 Accepts]: Start accepts. Automaton has 1781 states and 2288 transitions. Word has length 133 [2023-12-20 14:49:28,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:49:28,737 INFO L495 AbstractCegarLoop]: Abstraction has 1781 states and 2288 transitions. [2023-12-20 14:49:28,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-12-20 14:49:28,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states and 2288 transitions. [2023-12-20 14:49:28,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-12-20 14:49:28,739 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:49:28,740 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:49:28,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-12-20 14:49:28,740 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:49:28,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:49:28,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1706471398, now seen corresponding path program 1 times [2023-12-20 14:49:28,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:49:28,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269053449] [2023-12-20 14:49:28,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:49:28,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:49:28,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:28,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:49:28,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:28,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-20 14:49:28,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:28,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-20 14:49:28,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:28,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 14:49:28,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:28,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 14:49:28,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:28,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-20 14:49:28,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:28,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-12-20 14:49:28,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:28,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-12-20 14:49:28,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:28,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-12-20 14:49:28,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:28,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-12-20 14:49:28,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:28,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-12-20 14:49:28,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:28,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 14:49:28,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:28,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 14:49:28,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:28,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2023-12-20 14:49:28,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:28,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2023-12-20 14:49:28,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:28,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2023-12-20 14:49:28,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:28,827 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-12-20 14:49:28,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:49:28,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269053449] [2023-12-20 14:49:28,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269053449] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:49:28,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:49:28,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:49:28,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788262692] [2023-12-20 14:49:28,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:49:28,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:49:28,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:49:28,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:49:28,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:49:28,829 INFO L87 Difference]: Start difference. First operand 1781 states and 2288 transitions. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 4 states have internal predecessors, (85), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-12-20 14:49:29,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:49:29,579 INFO L93 Difference]: Finished difference Result 3128 states and 3957 transitions. [2023-12-20 14:49:29,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-20 14:49:29,579 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 4 states have internal predecessors, (85), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 145 [2023-12-20 14:49:29,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:49:29,583 INFO L225 Difference]: With dead ends: 3128 [2023-12-20 14:49:29,583 INFO L226 Difference]: Without dead ends: 1888 [2023-12-20 14:49:29,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-12-20 14:49:29,585 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 571 mSDsluCounter, 1348 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 1693 SdHoareTripleChecker+Invalid, 1366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-20 14:49:29,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [572 Valid, 1693 Invalid, 1366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1279 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-20 14:49:29,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2023-12-20 14:49:29,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 1706. [2023-12-20 14:49:29,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1706 states, 1389 states have (on average 1.306695464362851) internal successors, (1815), 1403 states have internal predecessors, (1815), 161 states have call successors, (161), 118 states have call predecessors, (161), 154 states have return successors, (218), 185 states have call predecessors, (218), 158 states have call successors, (218) [2023-12-20 14:49:29,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1706 states to 1706 states and 2194 transitions. [2023-12-20 14:49:29,651 INFO L78 Accepts]: Start accepts. Automaton has 1706 states and 2194 transitions. Word has length 145 [2023-12-20 14:49:29,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:49:29,651 INFO L495 AbstractCegarLoop]: Abstraction has 1706 states and 2194 transitions. [2023-12-20 14:49:29,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 4 states have internal predecessors, (85), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-12-20 14:49:29,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1706 states and 2194 transitions. [2023-12-20 14:49:29,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-12-20 14:49:29,653 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:49:29,653 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:49:29,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-12-20 14:49:29,654 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:49:29,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:49:29,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1034542947, now seen corresponding path program 1 times [2023-12-20 14:49:29,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:49:29,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578686798] [2023-12-20 14:49:29,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:49:29,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:49:29,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:29,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:49:29,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:29,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-20 14:49:29,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:29,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-20 14:49:29,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:29,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 14:49:29,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:29,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 14:49:29,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:29,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-20 14:49:29,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:29,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-12-20 14:49:29,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:29,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-12-20 14:49:29,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:29,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-12-20 14:49:29,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:29,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2023-12-20 14:49:29,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:29,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2023-12-20 14:49:29,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:29,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 14:49:29,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:29,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 14:49:29,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:29,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-12-20 14:49:29,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:29,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-12-20 14:49:29,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:29,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2023-12-20 14:49:29,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:29,814 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-12-20 14:49:29,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:49:29,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578686798] [2023-12-20 14:49:29,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578686798] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 14:49:29,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464543758] [2023-12-20 14:49:29,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:49:29,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 14:49:29,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 14:49:29,842 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 14:49:29,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-20 14:49:29,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:29,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-20 14:49:29,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 14:49:30,077 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-20 14:49:30,077 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 14:49:30,236 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 19 proven. 4 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-12-20 14:49:30,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464543758] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 14:49:30,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 14:49:30,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2023-12-20 14:49:30,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235552796] [2023-12-20 14:49:30,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 14:49:30,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-20 14:49:30,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:49:30,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-20 14:49:30,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-12-20 14:49:30,238 INFO L87 Difference]: Start difference. First operand 1706 states and 2194 transitions. Second operand has 14 states, 14 states have (on average 16.0) internal successors, (224), 12 states have internal predecessors, (224), 6 states have call successors, (38), 8 states have call predecessors, (38), 10 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2023-12-20 14:49:31,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:49:31,465 INFO L93 Difference]: Finished difference Result 3513 states and 4482 transitions. [2023-12-20 14:49:31,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-20 14:49:31,465 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 16.0) internal successors, (224), 12 states have internal predecessors, (224), 6 states have call successors, (38), 8 states have call predecessors, (38), 10 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) Word has length 147 [2023-12-20 14:49:31,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:49:31,469 INFO L225 Difference]: With dead ends: 3513 [2023-12-20 14:49:31,469 INFO L226 Difference]: Without dead ends: 2211 [2023-12-20 14:49:31,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 327 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=232, Invalid=638, Unknown=0, NotChecked=0, Total=870 [2023-12-20 14:49:31,471 INFO L413 NwaCegarLoop]: 286 mSDtfsCounter, 1785 mSDsluCounter, 1724 mSDsCounter, 0 mSdLazyCounter, 1814 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1818 SdHoareTripleChecker+Valid, 2010 SdHoareTripleChecker+Invalid, 2107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 1814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-20 14:49:31,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1818 Valid, 2010 Invalid, 2107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 1814 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-20 14:49:31,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2023-12-20 14:49:31,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 2067. [2023-12-20 14:49:31,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2067 states, 1638 states have (on average 1.2753357753357752) internal successors, (2089), 1660 states have internal predecessors, (2089), 215 states have call successors, (215), 168 states have call predecessors, (215), 212 states have return successors, (332), 239 states have call predecessors, (332), 212 states have call successors, (332) [2023-12-20 14:49:31,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 2636 transitions. [2023-12-20 14:49:31,559 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 2636 transitions. Word has length 147 [2023-12-20 14:49:31,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:49:31,560 INFO L495 AbstractCegarLoop]: Abstraction has 2067 states and 2636 transitions. [2023-12-20 14:49:31,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.0) internal successors, (224), 12 states have internal predecessors, (224), 6 states have call successors, (38), 8 states have call predecessors, (38), 10 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2023-12-20 14:49:31,560 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 2636 transitions. [2023-12-20 14:49:31,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-12-20 14:49:31,562 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:49:31,562 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:49:31,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-20 14:49:31,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-20 14:49:31,772 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:49:31,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:49:31,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1939723724, now seen corresponding path program 1 times [2023-12-20 14:49:31,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:49:31,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854568299] [2023-12-20 14:49:31,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:49:31,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:49:31,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:31,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:49:31,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:31,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-20 14:49:31,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:31,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:49:31,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:31,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-12-20 14:49:31,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:31,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-12-20 14:49:31,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:31,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:49:31,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:49:31,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854568299] [2023-12-20 14:49:31,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854568299] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:49:31,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:49:31,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-20 14:49:31,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821820144] [2023-12-20 14:49:31,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:49:31,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-20 14:49:31,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:49:31,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-20 14:49:31,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 14:49:31,901 INFO L87 Difference]: Start difference. First operand 2067 states and 2636 transitions. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 3 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:49:33,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:49:33,435 INFO L93 Difference]: Finished difference Result 2476 states and 3317 transitions. [2023-12-20 14:49:33,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-20 14:49:33,435 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 3 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 142 [2023-12-20 14:49:33,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:49:33,440 INFO L225 Difference]: With dead ends: 2476 [2023-12-20 14:49:33,440 INFO L226 Difference]: Without dead ends: 2177 [2023-12-20 14:49:33,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-12-20 14:49:33,441 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 939 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 961 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-20 14:49:33,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [961 Valid, 773 Invalid, 1139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1053 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-20 14:49:33,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2177 states. [2023-12-20 14:49:33,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2177 to 2067. [2023-12-20 14:49:33,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2067 states, 1638 states have (on average 1.2747252747252746) internal successors, (2088), 1660 states have internal predecessors, (2088), 215 states have call successors, (215), 168 states have call predecessors, (215), 212 states have return successors, (332), 239 states have call predecessors, (332), 212 states have call successors, (332) [2023-12-20 14:49:33,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 2635 transitions. [2023-12-20 14:49:33,597 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 2635 transitions. Word has length 142 [2023-12-20 14:49:33,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:49:33,597 INFO L495 AbstractCegarLoop]: Abstraction has 2067 states and 2635 transitions. [2023-12-20 14:49:33,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 3 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:49:33,597 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 2635 transitions. [2023-12-20 14:49:33,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-12-20 14:49:33,601 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:49:33,601 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:49:33,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-12-20 14:49:33,602 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:49:33,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:49:33,602 INFO L85 PathProgramCache]: Analyzing trace with hash 2066424182, now seen corresponding path program 1 times [2023-12-20 14:49:33,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:49:33,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751741228] [2023-12-20 14:49:33,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:49:33,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:49:33,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:33,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:49:33,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:33,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-20 14:49:33,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:33,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:49:33,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:33,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-12-20 14:49:33,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:33,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-12-20 14:49:33,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:33,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:49:33,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:49:33,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751741228] [2023-12-20 14:49:33,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751741228] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:49:33,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:49:33,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-20 14:49:33,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189945793] [2023-12-20 14:49:33,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:49:33,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-20 14:49:33,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:49:33,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-20 14:49:33,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-20 14:49:33,744 INFO L87 Difference]: Start difference. First operand 2067 states and 2635 transitions. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 4 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:49:36,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:49:36,117 INFO L93 Difference]: Finished difference Result 2884 states and 3997 transitions. [2023-12-20 14:49:36,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-20 14:49:36,118 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 4 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 142 [2023-12-20 14:49:36,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:49:36,123 INFO L225 Difference]: With dead ends: 2884 [2023-12-20 14:49:36,124 INFO L226 Difference]: Without dead ends: 2593 [2023-12-20 14:49:36,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-12-20 14:49:36,125 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 1474 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 2134 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1501 SdHoareTripleChecker+Valid, 1143 SdHoareTripleChecker+Invalid, 2276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 2134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-20 14:49:36,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1501 Valid, 1143 Invalid, 2276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 2134 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-12-20 14:49:36,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2593 states. [2023-12-20 14:49:36,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2593 to 2372. [2023-12-20 14:49:36,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2372 states, 1917 states have (on average 1.3291601460615545) internal successors, (2548), 1940 states have internal predecessors, (2548), 234 states have call successors, (234), 174 states have call predecessors, (234), 219 states have return successors, (354), 258 states have call predecessors, (354), 231 states have call successors, (354) [2023-12-20 14:49:36,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2372 states to 2372 states and 3136 transitions. [2023-12-20 14:49:36,336 INFO L78 Accepts]: Start accepts. Automaton has 2372 states and 3136 transitions. Word has length 142 [2023-12-20 14:49:36,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:49:36,337 INFO L495 AbstractCegarLoop]: Abstraction has 2372 states and 3136 transitions. [2023-12-20 14:49:36,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 4 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:49:36,337 INFO L276 IsEmpty]: Start isEmpty. Operand 2372 states and 3136 transitions. [2023-12-20 14:49:36,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-12-20 14:49:36,339 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:49:36,339 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:49:36,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-12-20 14:49:36,339 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:49:36,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:49:36,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1556450486, now seen corresponding path program 1 times [2023-12-20 14:49:36,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:49:36,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442328710] [2023-12-20 14:49:36,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:49:36,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:49:36,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:36,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:49:36,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:36,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-20 14:49:36,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:36,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:49:36,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:36,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-12-20 14:49:36,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:36,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-12-20 14:49:36,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:36,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:49:36,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:49:36,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442328710] [2023-12-20 14:49:36,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442328710] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:49:36,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:49:36,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:49:36,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511812040] [2023-12-20 14:49:36,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:49:36,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:49:36,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:49:36,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:49:36,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:49:36,500 INFO L87 Difference]: Start difference. First operand 2372 states and 3136 transitions. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:49:38,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:49:38,997 INFO L93 Difference]: Finished difference Result 3619 states and 5215 transitions. [2023-12-20 14:49:38,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-20 14:49:38,998 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 142 [2023-12-20 14:49:38,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:49:39,003 INFO L225 Difference]: With dead ends: 3619 [2023-12-20 14:49:39,003 INFO L226 Difference]: Without dead ends: 3023 [2023-12-20 14:49:39,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-12-20 14:49:39,006 INFO L413 NwaCegarLoop]: 479 mSDtfsCounter, 1499 mSDsluCounter, 1578 mSDsCounter, 0 mSdLazyCounter, 3449 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1526 SdHoareTripleChecker+Valid, 2057 SdHoareTripleChecker+Invalid, 3544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 3449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-20 14:49:39,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1526 Valid, 2057 Invalid, 3544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 3449 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-12-20 14:49:39,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3023 states. [2023-12-20 14:49:39,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3023 to 2654. [2023-12-20 14:49:39,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2654 states, 2173 states have (on average 1.3630924988495168) internal successors, (2962), 2197 states have internal predecessors, (2962), 253 states have call successors, (253), 180 states have call predecessors, (253), 226 states have return successors, (375), 278 states have call predecessors, (375), 250 states have call successors, (375) [2023-12-20 14:49:39,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 3590 transitions. [2023-12-20 14:49:39,221 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 3590 transitions. Word has length 142 [2023-12-20 14:49:39,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:49:39,222 INFO L495 AbstractCegarLoop]: Abstraction has 2654 states and 3590 transitions. [2023-12-20 14:49:39,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:49:39,222 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 3590 transitions. [2023-12-20 14:49:39,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-12-20 14:49:39,224 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:49:39,224 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:49:39,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-12-20 14:49:39,224 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:49:39,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:49:39,225 INFO L85 PathProgramCache]: Analyzing trace with hash -493958412, now seen corresponding path program 1 times [2023-12-20 14:49:39,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:49:39,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031382946] [2023-12-20 14:49:39,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:49:39,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:49:39,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:39,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:49:39,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:39,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-20 14:49:39,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:39,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:49:39,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:39,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-12-20 14:49:39,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:39,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-12-20 14:49:39,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:39,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:49:39,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:49:39,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031382946] [2023-12-20 14:49:39,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031382946] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:49:39,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:49:39,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:49:39,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031080492] [2023-12-20 14:49:39,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:49:39,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:49:39,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:49:39,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:49:39,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:49:39,378 INFO L87 Difference]: Start difference. First operand 2654 states and 3590 transitions. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:49:42,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:49:42,536 INFO L93 Difference]: Finished difference Result 4696 states and 6989 transitions. [2023-12-20 14:49:42,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-20 14:49:42,537 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 142 [2023-12-20 14:49:42,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:49:42,546 INFO L225 Difference]: With dead ends: 4696 [2023-12-20 14:49:42,546 INFO L226 Difference]: Without dead ends: 3818 [2023-12-20 14:49:42,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-12-20 14:49:42,549 INFO L413 NwaCegarLoop]: 477 mSDtfsCounter, 1497 mSDsluCounter, 1578 mSDsCounter, 0 mSdLazyCounter, 3445 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1524 SdHoareTripleChecker+Valid, 2055 SdHoareTripleChecker+Invalid, 3542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 3445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-12-20 14:49:42,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1524 Valid, 2055 Invalid, 3542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 3445 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-12-20 14:49:42,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3818 states. [2023-12-20 14:49:42,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3818 to 3219. [2023-12-20 14:49:42,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3219 states, 2686 states have (on average 1.4113924050632911) internal successors, (3791), 2712 states have internal predecessors, (3791), 291 states have call successors, (291), 192 states have call predecessors, (291), 240 states have return successors, (421), 318 states have call predecessors, (421), 288 states have call successors, (421) [2023-12-20 14:49:42,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3219 states to 3219 states and 4503 transitions. [2023-12-20 14:49:42,762 INFO L78 Accepts]: Start accepts. Automaton has 3219 states and 4503 transitions. Word has length 142 [2023-12-20 14:49:42,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:49:42,762 INFO L495 AbstractCegarLoop]: Abstraction has 3219 states and 4503 transitions. [2023-12-20 14:49:42,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:49:42,762 INFO L276 IsEmpty]: Start isEmpty. Operand 3219 states and 4503 transitions. [2023-12-20 14:49:42,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-12-20 14:49:42,767 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:49:42,767 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:49:42,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-12-20 14:49:42,768 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:49:42,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:49:42,768 INFO L85 PathProgramCache]: Analyzing trace with hash -5911306, now seen corresponding path program 1 times [2023-12-20 14:49:42,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:49:42,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715206835] [2023-12-20 14:49:42,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:49:42,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:49:42,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:42,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:49:42,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:42,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-20 14:49:42,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:42,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:49:42,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:42,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-12-20 14:49:42,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:42,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-12-20 14:49:42,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:42,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:49:42,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:49:42,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715206835] [2023-12-20 14:49:42,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715206835] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:49:42,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:49:42,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:49:42,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643999139] [2023-12-20 14:49:42,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:49:42,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:49:42,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:49:42,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:49:42,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:49:42,946 INFO L87 Difference]: Start difference. First operand 3219 states and 4503 transitions. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:49:44,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:49:44,684 INFO L93 Difference]: Finished difference Result 5249 states and 7893 transitions. [2023-12-20 14:49:44,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-20 14:49:44,685 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 142 [2023-12-20 14:49:44,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:49:44,693 INFO L225 Difference]: With dead ends: 5249 [2023-12-20 14:49:44,693 INFO L226 Difference]: Without dead ends: 3806 [2023-12-20 14:49:44,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-12-20 14:49:44,697 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 1135 mSDsluCounter, 876 mSDsCounter, 0 mSdLazyCounter, 1815 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1163 SdHoareTripleChecker+Valid, 1159 SdHoareTripleChecker+Invalid, 1914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-20 14:49:44,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1163 Valid, 1159 Invalid, 1914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1815 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-20 14:49:44,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3806 states. [2023-12-20 14:49:44,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3806 to 3219. [2023-12-20 14:49:44,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3219 states, 2686 states have (on average 1.4095309009679822) internal successors, (3786), 2712 states have internal predecessors, (3786), 291 states have call successors, (291), 192 states have call predecessors, (291), 240 states have return successors, (421), 318 states have call predecessors, (421), 288 states have call successors, (421) [2023-12-20 14:49:44,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3219 states to 3219 states and 4498 transitions. [2023-12-20 14:49:44,925 INFO L78 Accepts]: Start accepts. Automaton has 3219 states and 4498 transitions. Word has length 142 [2023-12-20 14:49:44,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:49:44,925 INFO L495 AbstractCegarLoop]: Abstraction has 3219 states and 4498 transitions. [2023-12-20 14:49:44,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:49:44,925 INFO L276 IsEmpty]: Start isEmpty. Operand 3219 states and 4498 transitions. [2023-12-20 14:49:44,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-12-20 14:49:44,928 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:49:44,928 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:49:44,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-12-20 14:49:44,928 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:49:44,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:49:44,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1098546508, now seen corresponding path program 1 times [2023-12-20 14:49:44,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:49:44,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155828197] [2023-12-20 14:49:44,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:49:44,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:49:44,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:44,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:49:44,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:45,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-20 14:49:45,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:45,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:49:45,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:45,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-12-20 14:49:45,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:45,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-12-20 14:49:45,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:45,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:49:45,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:49:45,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155828197] [2023-12-20 14:49:45,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155828197] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:49:45,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:49:45,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:49:45,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537177898] [2023-12-20 14:49:45,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:49:45,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:49:45,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:49:45,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:49:45,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:49:45,073 INFO L87 Difference]: Start difference. First operand 3219 states and 4498 transitions. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:49:46,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:49:46,510 INFO L93 Difference]: Finished difference Result 5243 states and 7867 transitions. [2023-12-20 14:49:46,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-20 14:49:46,510 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 142 [2023-12-20 14:49:46,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:49:46,520 INFO L225 Difference]: With dead ends: 5243 [2023-12-20 14:49:46,520 INFO L226 Difference]: Without dead ends: 3800 [2023-12-20 14:49:46,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-12-20 14:49:46,523 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 1381 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1409 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 1694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-20 14:49:46,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1409 Valid, 965 Invalid, 1694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1553 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-20 14:49:46,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3800 states. [2023-12-20 14:49:46,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3800 to 3219. [2023-12-20 14:49:46,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3219 states, 2686 states have (on average 1.4076693968726732) internal successors, (3781), 2712 states have internal predecessors, (3781), 291 states have call successors, (291), 192 states have call predecessors, (291), 240 states have return successors, (421), 318 states have call predecessors, (421), 288 states have call successors, (421) [2023-12-20 14:49:46,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3219 states to 3219 states and 4493 transitions. [2023-12-20 14:49:46,740 INFO L78 Accepts]: Start accepts. Automaton has 3219 states and 4493 transitions. Word has length 142 [2023-12-20 14:49:46,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:49:46,740 INFO L495 AbstractCegarLoop]: Abstraction has 3219 states and 4493 transitions. [2023-12-20 14:49:46,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:49:46,740 INFO L276 IsEmpty]: Start isEmpty. Operand 3219 states and 4493 transitions. [2023-12-20 14:49:46,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-12-20 14:49:46,743 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:49:46,743 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:49:46,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-12-20 14:49:46,744 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:49:46,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:49:46,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1914248502, now seen corresponding path program 1 times [2023-12-20 14:49:46,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:49:46,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380570632] [2023-12-20 14:49:46,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:49:46,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:49:46,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:46,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:49:46,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:46,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-20 14:49:46,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:46,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:49:46,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:46,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-12-20 14:49:46,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:46,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-12-20 14:49:46,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:46,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:49:46,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:49:46,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380570632] [2023-12-20 14:49:46,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380570632] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:49:46,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:49:46,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:49:46,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798164470] [2023-12-20 14:49:46,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:49:46,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:49:46,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:49:46,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:49:46,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:49:46,905 INFO L87 Difference]: Start difference. First operand 3219 states and 4493 transitions. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:49:48,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:49:48,664 INFO L93 Difference]: Finished difference Result 5236 states and 7839 transitions. [2023-12-20 14:49:48,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-20 14:49:48,664 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 142 [2023-12-20 14:49:48,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:49:48,672 INFO L225 Difference]: With dead ends: 5236 [2023-12-20 14:49:48,673 INFO L226 Difference]: Without dead ends: 3793 [2023-12-20 14:49:48,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-12-20 14:49:48,676 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 1136 mSDsluCounter, 876 mSDsCounter, 0 mSdLazyCounter, 1778 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1164 SdHoareTripleChecker+Valid, 1159 SdHoareTripleChecker+Invalid, 1877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-20 14:49:48,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1164 Valid, 1159 Invalid, 1877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1778 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-20 14:49:48,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3793 states. [2023-12-20 14:49:48,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3793 to 3219. [2023-12-20 14:49:48,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3219 states, 2686 states have (on average 1.405807892777364) internal successors, (3776), 2712 states have internal predecessors, (3776), 291 states have call successors, (291), 192 states have call predecessors, (291), 240 states have return successors, (421), 318 states have call predecessors, (421), 288 states have call successors, (421) [2023-12-20 14:49:48,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3219 states to 3219 states and 4488 transitions. [2023-12-20 14:49:48,936 INFO L78 Accepts]: Start accepts. Automaton has 3219 states and 4488 transitions. Word has length 142 [2023-12-20 14:49:48,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:49:48,936 INFO L495 AbstractCegarLoop]: Abstraction has 3219 states and 4488 transitions. [2023-12-20 14:49:48,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:49:48,936 INFO L276 IsEmpty]: Start isEmpty. Operand 3219 states and 4488 transitions. [2023-12-20 14:49:48,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-12-20 14:49:48,939 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:49:48,939 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:49:48,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-12-20 14:49:48,939 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:49:48,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:49:48,939 INFO L85 PathProgramCache]: Analyzing trace with hash 71772788, now seen corresponding path program 1 times [2023-12-20 14:49:48,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:49:48,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592701545] [2023-12-20 14:49:48,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:49:48,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:49:48,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:48,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:49:48,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:49,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-20 14:49:49,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:49,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:49:49,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:49,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-12-20 14:49:49,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:49,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-12-20 14:49:49,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:49,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:49:49,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:49:49,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592701545] [2023-12-20 14:49:49,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592701545] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:49:49,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:49:49,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:49:49,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450212583] [2023-12-20 14:49:49,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:49:49,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:49:49,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:49:49,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:49:49,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:49:49,087 INFO L87 Difference]: Start difference. First operand 3219 states and 4488 transitions. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:49:50,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:49:50,670 INFO L93 Difference]: Finished difference Result 5224 states and 7801 transitions. [2023-12-20 14:49:50,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-20 14:49:50,671 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 142 [2023-12-20 14:49:50,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:49:50,679 INFO L225 Difference]: With dead ends: 5224 [2023-12-20 14:49:50,679 INFO L226 Difference]: Without dead ends: 3781 [2023-12-20 14:49:50,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-12-20 14:49:50,682 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 1311 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 1587 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1339 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 1727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-20 14:49:50,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1339 Valid, 966 Invalid, 1727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1587 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-20 14:49:50,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3781 states. [2023-12-20 14:49:50,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3781 to 3219. [2023-12-20 14:49:50,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3219 states, 2686 states have (on average 1.4039463886820551) internal successors, (3771), 2712 states have internal predecessors, (3771), 291 states have call successors, (291), 192 states have call predecessors, (291), 240 states have return successors, (421), 318 states have call predecessors, (421), 288 states have call successors, (421) [2023-12-20 14:49:50,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3219 states to 3219 states and 4483 transitions. [2023-12-20 14:49:50,908 INFO L78 Accepts]: Start accepts. Automaton has 3219 states and 4483 transitions. Word has length 142 [2023-12-20 14:49:50,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:49:50,908 INFO L495 AbstractCegarLoop]: Abstraction has 3219 states and 4483 transitions. [2023-12-20 14:49:50,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:49:50,909 INFO L276 IsEmpty]: Start isEmpty. Operand 3219 states and 4483 transitions. [2023-12-20 14:49:50,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-12-20 14:49:50,913 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:49:50,913 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:49:50,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-12-20 14:49:50,914 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:49:50,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:49:50,914 INFO L85 PathProgramCache]: Analyzing trace with hash -260870350, now seen corresponding path program 1 times [2023-12-20 14:49:50,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:49:50,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849628593] [2023-12-20 14:49:50,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:49:50,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:49:50,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:50,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:49:50,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:51,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-20 14:49:51,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:51,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:49:51,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:51,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-12-20 14:49:51,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:51,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-12-20 14:49:51,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:51,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:49:51,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:49:51,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849628593] [2023-12-20 14:49:51,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849628593] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:49:51,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:49:51,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-20 14:49:51,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37888457] [2023-12-20 14:49:51,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:49:51,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-20 14:49:51,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:49:51,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-20 14:49:51,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-20 14:49:51,080 INFO L87 Difference]: Start difference. First operand 3219 states and 4483 transitions. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 7 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:49:55,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:49:55,427 INFO L93 Difference]: Finished difference Result 7214 states and 11070 transitions. [2023-12-20 14:49:55,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-20 14:49:55,428 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 7 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 142 [2023-12-20 14:49:55,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:49:55,438 INFO L225 Difference]: With dead ends: 7214 [2023-12-20 14:49:55,438 INFO L226 Difference]: Without dead ends: 5771 [2023-12-20 14:49:55,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2023-12-20 14:49:55,442 INFO L413 NwaCegarLoop]: 477 mSDtfsCounter, 1845 mSDsluCounter, 2458 mSDsCounter, 0 mSdLazyCounter, 4628 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1874 SdHoareTripleChecker+Valid, 2935 SdHoareTripleChecker+Invalid, 4729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 4628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-12-20 14:49:55,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1874 Valid, 2935 Invalid, 4729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 4628 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-12-20 14:49:55,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5771 states. [2023-12-20 14:49:55,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5771 to 4390. [2023-12-20 14:49:55,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4390 states, 3753 states have (on average 1.455369038102851) internal successors, (5462), 3783 states have internal predecessors, (5462), 367 states have call successors, (367), 216 states have call predecessors, (367), 268 states have return successors, (519), 398 states have call predecessors, (519), 364 states have call successors, (519) [2023-12-20 14:49:55,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4390 states to 4390 states and 6348 transitions. [2023-12-20 14:49:55,757 INFO L78 Accepts]: Start accepts. Automaton has 4390 states and 6348 transitions. Word has length 142 [2023-12-20 14:49:55,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:49:55,757 INFO L495 AbstractCegarLoop]: Abstraction has 4390 states and 6348 transitions. [2023-12-20 14:49:55,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 7 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:49:55,758 INFO L276 IsEmpty]: Start isEmpty. Operand 4390 states and 6348 transitions. [2023-12-20 14:49:55,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-12-20 14:49:55,761 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:49:55,761 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:49:55,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-12-20 14:49:55,761 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:49:55,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:49:55,761 INFO L85 PathProgramCache]: Analyzing trace with hash -211069070, now seen corresponding path program 1 times [2023-12-20 14:49:55,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:49:55,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370488195] [2023-12-20 14:49:55,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:49:55,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:49:55,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:55,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:49:55,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:55,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-20 14:49:55,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:55,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:49:55,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:55,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-12-20 14:49:55,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:55,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-12-20 14:49:55,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:55,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:49:55,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:49:55,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370488195] [2023-12-20 14:49:55,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370488195] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:49:55,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:49:55,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:49:55,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41485659] [2023-12-20 14:49:55,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:49:55,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:49:55,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:49:55,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:49:55,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:49:55,903 INFO L87 Difference]: Start difference. First operand 4390 states and 6348 transitions. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:49:59,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:49:59,107 INFO L93 Difference]: Finished difference Result 10943 states and 17005 transitions. [2023-12-20 14:49:59,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-20 14:49:59,107 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 142 [2023-12-20 14:49:59,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:49:59,126 INFO L225 Difference]: With dead ends: 10943 [2023-12-20 14:49:59,126 INFO L226 Difference]: Without dead ends: 8329 [2023-12-20 14:49:59,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-12-20 14:49:59,131 INFO L413 NwaCegarLoop]: 477 mSDtfsCounter, 1467 mSDsluCounter, 1578 mSDsCounter, 0 mSdLazyCounter, 3302 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1494 SdHoareTripleChecker+Valid, 2055 SdHoareTripleChecker+Invalid, 3399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 3302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-12-20 14:49:59,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1494 Valid, 2055 Invalid, 3399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 3302 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-12-20 14:49:59,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8329 states. [2023-12-20 14:49:59,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8329 to 6709. [2023-12-20 14:49:59,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6709 states, 5864 states have (on average 1.5030695770804912) internal successors, (8814), 5902 states have internal predecessors, (8814), 519 states have call successors, (519), 264 states have call predecessors, (519), 324 states have return successors, (733), 558 states have call predecessors, (733), 516 states have call successors, (733) [2023-12-20 14:49:59,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6709 states to 6709 states and 10066 transitions. [2023-12-20 14:49:59,546 INFO L78 Accepts]: Start accepts. Automaton has 6709 states and 10066 transitions. Word has length 142 [2023-12-20 14:49:59,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:49:59,546 INFO L495 AbstractCegarLoop]: Abstraction has 6709 states and 10066 transitions. [2023-12-20 14:49:59,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:49:59,546 INFO L276 IsEmpty]: Start isEmpty. Operand 6709 states and 10066 transitions. [2023-12-20 14:49:59,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-12-20 14:49:59,550 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:49:59,550 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:49:59,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-12-20 14:49:59,550 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:49:59,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:49:59,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1790817200, now seen corresponding path program 1 times [2023-12-20 14:49:59,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:49:59,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589794938] [2023-12-20 14:49:59,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:49:59,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:49:59,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:59,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:49:59,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:59,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-20 14:49:59,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:59,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:49:59,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:59,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-12-20 14:49:59,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:59,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-12-20 14:49:59,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:49:59,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:49:59,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:49:59,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589794938] [2023-12-20 14:49:59,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589794938] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:49:59,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:49:59,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:49:59,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621819109] [2023-12-20 14:49:59,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:49:59,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:49:59,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:49:59,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:49:59,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:49:59,699 INFO L87 Difference]: Start difference. First operand 6709 states and 10066 transitions. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:50:03,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:50:03,063 INFO L93 Difference]: Finished difference Result 19272 states and 30525 transitions. [2023-12-20 14:50:03,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-20 14:50:03,063 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 142 [2023-12-20 14:50:03,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:50:03,151 INFO L225 Difference]: With dead ends: 19272 [2023-12-20 14:50:03,151 INFO L226 Difference]: Without dead ends: 14339 [2023-12-20 14:50:03,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-12-20 14:50:03,165 INFO L413 NwaCegarLoop]: 477 mSDtfsCounter, 1466 mSDsluCounter, 1578 mSDsCounter, 0 mSdLazyCounter, 3289 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1493 SdHoareTripleChecker+Valid, 2055 SdHoareTripleChecker+Invalid, 3386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 3289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-12-20 14:50:03,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1493 Valid, 2055 Invalid, 3386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 3289 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-12-20 14:50:03,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14339 states. [2023-12-20 14:50:03,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14339 to 11362. [2023-12-20 14:50:03,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11362 states, 10101 states have (on average 1.5384615384615385) internal successors, (15540), 10155 states have internal predecessors, (15540), 823 states have call successors, (823), 360 states have call predecessors, (823), 436 states have return successors, (1215), 878 states have call predecessors, (1215), 820 states have call successors, (1215) [2023-12-20 14:50:03,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11362 states to 11362 states and 17578 transitions. [2023-12-20 14:50:03,781 INFO L78 Accepts]: Start accepts. Automaton has 11362 states and 17578 transitions. Word has length 142 [2023-12-20 14:50:03,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:50:03,781 INFO L495 AbstractCegarLoop]: Abstraction has 11362 states and 17578 transitions. [2023-12-20 14:50:03,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:50:03,781 INFO L276 IsEmpty]: Start isEmpty. Operand 11362 states and 17578 transitions. [2023-12-20 14:50:03,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-12-20 14:50:03,787 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:50:03,787 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:50:03,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-12-20 14:50:03,788 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:50:03,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:50:03,788 INFO L85 PathProgramCache]: Analyzing trace with hash -777005134, now seen corresponding path program 1 times [2023-12-20 14:50:03,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:50:03,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721736292] [2023-12-20 14:50:03,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:50:03,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:50:03,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:50:03,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:50:03,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:50:03,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-20 14:50:03,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:50:03,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:50:03,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:50:03,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-12-20 14:50:03,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:50:03,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-12-20 14:50:03,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:50:03,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:50:03,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:50:03,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721736292] [2023-12-20 14:50:03,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721736292] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:50:03,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:50:03,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:50:03,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301258751] [2023-12-20 14:50:03,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:50:03,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:50:03,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:50:03,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:50:03,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:50:03,954 INFO L87 Difference]: Start difference. First operand 11362 states and 17578 transitions. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:50:08,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:50:08,313 INFO L93 Difference]: Finished difference Result 40155 states and 64513 transitions. [2023-12-20 14:50:08,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-20 14:50:08,314 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 142 [2023-12-20 14:50:08,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:50:08,395 INFO L225 Difference]: With dead ends: 40155 [2023-12-20 14:50:08,396 INFO L226 Difference]: Without dead ends: 30569 [2023-12-20 14:50:08,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-12-20 14:50:08,418 INFO L413 NwaCegarLoop]: 475 mSDtfsCounter, 1557 mSDsluCounter, 1573 mSDsCounter, 0 mSdLazyCounter, 3868 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1583 SdHoareTripleChecker+Valid, 2048 SdHoareTripleChecker+Invalid, 3967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 3868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-12-20 14:50:08,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1583 Valid, 2048 Invalid, 3967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 3868 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-12-20 14:50:08,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30569 states. [2023-12-20 14:50:09,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30569 to 20635. [2023-12-20 14:50:09,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20635 states, 18574 states have (on average 1.5616453106492947) internal successors, (29006), 18660 states have internal predecessors, (29006), 1399 states have call successors, (1399), 552 states have call predecessors, (1399), 660 states have return successors, (2309), 1486 states have call predecessors, (2309), 1396 states have call successors, (2309) [2023-12-20 14:50:09,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20635 states to 20635 states and 32714 transitions. [2023-12-20 14:50:09,550 INFO L78 Accepts]: Start accepts. Automaton has 20635 states and 32714 transitions. Word has length 142 [2023-12-20 14:50:09,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:50:09,550 INFO L495 AbstractCegarLoop]: Abstraction has 20635 states and 32714 transitions. [2023-12-20 14:50:09,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:50:09,551 INFO L276 IsEmpty]: Start isEmpty. Operand 20635 states and 32714 transitions. [2023-12-20 14:50:09,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-12-20 14:50:09,561 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:50:09,561 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:50:09,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-12-20 14:50:09,562 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:50:09,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:50:09,562 INFO L85 PathProgramCache]: Analyzing trace with hash -305648784, now seen corresponding path program 1 times [2023-12-20 14:50:09,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:50:09,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991181039] [2023-12-20 14:50:09,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:50:09,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:50:09,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:50:09,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:50:09,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:50:09,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-20 14:50:09,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:50:09,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:50:09,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:50:09,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-12-20 14:50:09,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:50:09,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-12-20 14:50:09,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:50:09,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:50:09,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:50:09,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991181039] [2023-12-20 14:50:09,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991181039] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:50:09,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:50:09,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:50:09,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940022551] [2023-12-20 14:50:09,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:50:09,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:50:09,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:50:09,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:50:09,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:50:09,711 INFO L87 Difference]: Start difference. First operand 20635 states and 32714 transitions. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:50:14,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:50:14,198 INFO L93 Difference]: Finished difference Result 76802 states and 124895 transitions. [2023-12-20 14:50:14,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-20 14:50:14,198 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 142 [2023-12-20 14:50:14,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:50:14,345 INFO L225 Difference]: With dead ends: 76802 [2023-12-20 14:50:14,345 INFO L226 Difference]: Without dead ends: 57943 [2023-12-20 14:50:14,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-12-20 14:50:14,381 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 1872 mSDsluCounter, 1135 mSDsCounter, 0 mSdLazyCounter, 2881 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1910 SdHoareTripleChecker+Valid, 1472 SdHoareTripleChecker+Invalid, 3011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 2881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-12-20 14:50:14,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1910 Valid, 1472 Invalid, 3011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 2881 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-12-20 14:50:14,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57943 states. [2023-12-20 14:50:16,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57943 to 38540. [2023-12-20 14:50:16,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38540 states, 34911 states have (on average 1.57108074818825) internal successors, (54848), 35061 states have internal predecessors, (54848), 2519 states have call successors, (2519), 936 states have call predecessors, (2519), 1108 states have return successors, (4951), 2670 states have call predecessors, (4951), 2516 states have call successors, (4951) [2023-12-20 14:50:16,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38540 states to 38540 states and 62318 transitions. [2023-12-20 14:50:16,557 INFO L78 Accepts]: Start accepts. Automaton has 38540 states and 62318 transitions. Word has length 142 [2023-12-20 14:50:16,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:50:16,557 INFO L495 AbstractCegarLoop]: Abstraction has 38540 states and 62318 transitions. [2023-12-20 14:50:16,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:50:16,557 INFO L276 IsEmpty]: Start isEmpty. Operand 38540 states and 62318 transitions. [2023-12-20 14:50:16,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-12-20 14:50:16,573 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:50:16,573 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:50:16,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-12-20 14:50:16,573 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:50:16,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:50:16,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1953011726, now seen corresponding path program 1 times [2023-12-20 14:50:16,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:50:16,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996868930] [2023-12-20 14:50:16,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:50:16,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:50:16,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:50:16,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:50:16,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:50:16,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-20 14:50:16,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:50:16,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:50:16,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:50:16,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-12-20 14:50:16,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:50:16,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-12-20 14:50:16,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:50:16,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:50:16,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:50:16,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996868930] [2023-12-20 14:50:16,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996868930] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:50:16,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:50:16,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:50:16,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356354931] [2023-12-20 14:50:16,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:50:16,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:50:16,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:50:16,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:50:16,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:50:16,719 INFO L87 Difference]: Start difference. First operand 38540 states and 62318 transitions. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:50:22,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:50:22,857 INFO L93 Difference]: Finished difference Result 146257 states and 241205 transitions. [2023-12-20 14:50:22,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-20 14:50:22,858 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 142 [2023-12-20 14:50:22,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:50:23,306 INFO L225 Difference]: With dead ends: 146257 [2023-12-20 14:50:23,306 INFO L226 Difference]: Without dead ends: 109493 [2023-12-20 14:50:23,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-12-20 14:50:23,372 INFO L413 NwaCegarLoop]: 475 mSDtfsCounter, 1543 mSDsluCounter, 1573 mSDsCounter, 0 mSdLazyCounter, 3748 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1569 SdHoareTripleChecker+Valid, 2048 SdHoareTripleChecker+Invalid, 3847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 3748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-12-20 14:50:23,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1569 Valid, 2048 Invalid, 3847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 3748 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-12-20 14:50:23,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109493 states. [2023-12-20 14:50:27,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109493 to 74989. [2023-12-20 14:50:27,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74989 states, 68288 states have (on average 1.5787546860356139) internal successors, (107810), 68566 states have internal predecessors, (107810), 4695 states have call successors, (4695), 1704 states have call predecessors, (4695), 2004 states have return successors, (11629), 4974 states have call predecessors, (11629), 4692 states have call successors, (11629) [2023-12-20 14:50:27,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74989 states to 74989 states and 124134 transitions. [2023-12-20 14:50:27,586 INFO L78 Accepts]: Start accepts. Automaton has 74989 states and 124134 transitions. Word has length 142 [2023-12-20 14:50:27,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:50:27,586 INFO L495 AbstractCegarLoop]: Abstraction has 74989 states and 124134 transitions. [2023-12-20 14:50:27,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:50:27,587 INFO L276 IsEmpty]: Start isEmpty. Operand 74989 states and 124134 transitions. [2023-12-20 14:50:27,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-12-20 14:50:27,617 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:50:27,617 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:50:27,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-12-20 14:50:27,618 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:50:27,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:50:27,618 INFO L85 PathProgramCache]: Analyzing trace with hash 210604848, now seen corresponding path program 1 times [2023-12-20 14:50:27,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:50:27,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090375904] [2023-12-20 14:50:27,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:50:27,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:50:27,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:50:27,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:50:27,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:50:27,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-20 14:50:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:50:27,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:50:27,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:50:27,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-12-20 14:50:27,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:50:27,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-12-20 14:50:27,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:50:27,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:50:27,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:50:27,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090375904] [2023-12-20 14:50:27,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090375904] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:50:27,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:50:27,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:50:27,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229498088] [2023-12-20 14:50:27,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:50:27,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:50:27,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:50:27,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:50:27,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:50:27,759 INFO L87 Difference]: Start difference. First operand 74989 states and 124134 transitions. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:50:36,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:50:36,915 INFO L93 Difference]: Finished difference Result 283758 states and 477351 transitions. [2023-12-20 14:50:36,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-20 14:50:36,915 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 142 [2023-12-20 14:50:36,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:50:37,840 INFO L225 Difference]: With dead ends: 283758 [2023-12-20 14:50:37,841 INFO L226 Difference]: Without dead ends: 210545 [2023-12-20 14:50:37,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-12-20 14:50:37,998 INFO L413 NwaCegarLoop]: 475 mSDtfsCounter, 1688 mSDsluCounter, 1573 mSDsCounter, 0 mSdLazyCounter, 3208 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1726 SdHoareTripleChecker+Valid, 2048 SdHoareTripleChecker+Invalid, 3308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 3208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-12-20 14:50:37,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1726 Valid, 2048 Invalid, 3308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 3208 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-12-20 14:50:38,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210545 states. [2023-12-20 14:50:45,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210545 to 148143. [2023-12-20 14:50:45,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148143 states, 135426 states have (on average 1.5839056015831525) internal successors, (214502), 135960 states have internal predecessors, (214502), 8919 states have call successors, (8919), 3240 states have call predecessors, (8919), 3796 states have return successors, (29231), 9454 states have call predecessors, (29231), 8916 states have call successors, (29231) [2023-12-20 14:50:46,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148143 states to 148143 states and 252652 transitions. [2023-12-20 14:50:46,639 INFO L78 Accepts]: Start accepts. Automaton has 148143 states and 252652 transitions. Word has length 142 [2023-12-20 14:50:46,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:50:46,652 INFO L495 AbstractCegarLoop]: Abstraction has 148143 states and 252652 transitions. [2023-12-20 14:50:46,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:50:46,652 INFO L276 IsEmpty]: Start isEmpty. Operand 148143 states and 252652 transitions. [2023-12-20 14:50:46,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-12-20 14:50:46,704 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:50:46,704 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:50:46,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-12-20 14:50:46,707 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:50:46,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:50:46,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1762560530, now seen corresponding path program 1 times [2023-12-20 14:50:46,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:50:46,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847626688] [2023-12-20 14:50:46,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:50:46,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:50:46,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:50:46,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:50:46,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:50:46,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-20 14:50:46,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:50:46,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:50:46,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:50:46,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-12-20 14:50:46,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:50:46,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-12-20 14:50:46,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:50:46,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:50:46,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:50:46,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847626688] [2023-12-20 14:50:46,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847626688] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:50:46,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:50:46,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:50:46,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637361741] [2023-12-20 14:50:46,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:50:46,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:50:46,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:50:46,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:50:46,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:50:46,854 INFO L87 Difference]: Start difference. First operand 148143 states and 252652 transitions. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:50:55,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:50:55,569 INFO L93 Difference]: Finished difference Result 336908 states and 592212 transitions. [2023-12-20 14:50:55,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-20 14:50:55,572 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 142 [2023-12-20 14:50:55,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:50:56,543 INFO L225 Difference]: With dead ends: 336908 [2023-12-20 14:50:56,543 INFO L226 Difference]: Without dead ends: 190541 [2023-12-20 14:50:56,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-12-20 14:50:56,906 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 1140 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 1656 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1168 SdHoareTripleChecker+Valid, 1158 SdHoareTripleChecker+Invalid, 1757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-20 14:50:56,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1168 Valid, 1158 Invalid, 1757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1656 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-20 14:50:57,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190541 states. [2023-12-20 14:51:04,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190541 to 148143. [2023-12-20 14:51:04,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148143 states, 135426 states have (on average 1.5801175549746724) internal successors, (213989), 135960 states have internal predecessors, (213989), 8919 states have call successors, (8919), 3240 states have call predecessors, (8919), 3796 states have return successors, (29231), 9454 states have call predecessors, (29231), 8916 states have call successors, (29231) [2023-12-20 14:51:05,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148143 states to 148143 states and 252139 transitions. [2023-12-20 14:51:05,785 INFO L78 Accepts]: Start accepts. Automaton has 148143 states and 252139 transitions. Word has length 142 [2023-12-20 14:51:05,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:51:05,785 INFO L495 AbstractCegarLoop]: Abstraction has 148143 states and 252139 transitions. [2023-12-20 14:51:05,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:51:05,786 INFO L276 IsEmpty]: Start isEmpty. Operand 148143 states and 252139 transitions. [2023-12-20 14:51:05,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-12-20 14:51:05,856 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:51:05,856 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:51:05,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-12-20 14:51:05,857 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:51:05,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:51:05,857 INFO L85 PathProgramCache]: Analyzing trace with hash 390546288, now seen corresponding path program 1 times [2023-12-20 14:51:05,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:51:05,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965584208] [2023-12-20 14:51:05,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:51:05,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:51:05,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:51:05,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:51:05,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:51:05,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-20 14:51:05,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:51:06,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:51:06,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:51:06,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-12-20 14:51:06,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:51:06,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-12-20 14:51:06,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:51:06,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:51:06,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:51:06,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965584208] [2023-12-20 14:51:06,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965584208] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:51:06,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:51:06,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:51:06,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391555456] [2023-12-20 14:51:06,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:51:06,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:51:06,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:51:06,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:51:06,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:51:06,034 INFO L87 Difference]: Start difference. First operand 148143 states and 252139 transitions. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)