/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 true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/recursified_loop-simple/recursified_deep-nested.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-15 23:02:30,694 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-15 23:02:30,765 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-15 23:02:30,768 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-15 23:02:30,768 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-15 23:02:30,792 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-15 23:02:30,792 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-15 23:02:30,793 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-15 23:02:30,793 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-15 23:02:30,793 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-15 23:02:30,794 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-15 23:02:30,794 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-15 23:02:30,794 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-15 23:02:30,794 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-15 23:02:30,795 INFO L153 SettingsManager]: * Use SBE=true [2023-12-15 23:02:30,795 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-15 23:02:30,795 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-15 23:02:30,795 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-15 23:02:30,796 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-15 23:02:30,796 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-15 23:02:30,796 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-15 23:02:30,799 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-15 23:02:30,799 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-15 23:02:30,799 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-15 23:02:30,799 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-15 23:02:30,800 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-15 23:02:30,800 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-15 23:02:30,800 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-15 23:02:30,800 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-15 23:02:30,800 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-15 23:02:30,800 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-15 23:02:30,801 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-15 23:02:30,801 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 23:02:30,801 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-15 23:02:30,801 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-15 23:02:30,801 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-15 23:02:30,801 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-15 23:02:30,802 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-15 23:02:30,802 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-15 23:02:30,802 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-15 23:02:30,802 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-15 23:02:30,803 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-15 23:02:30,803 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-15 23:02:30,804 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-15 23:02:31,040 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-15 23:02:31,059 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-15 23:02:31,060 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-15 23:02:31,061 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-15 23:02:31,061 INFO L274 PluginConnector]: CDTParser initialized [2023-12-15 23:02:31,062 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursified_loop-simple/recursified_deep-nested.c [2023-12-15 23:02:32,185 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-15 23:02:32,345 INFO L384 CDTParser]: Found 1 translation units. [2023-12-15 23:02:32,346 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursified_loop-simple/recursified_deep-nested.c [2023-12-15 23:02:32,353 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3dda800a/c7f72f373922401d89445eda71de2e06/FLAG220c54ec8 [2023-12-15 23:02:32,367 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3dda800a/c7f72f373922401d89445eda71de2e06 [2023-12-15 23:02:32,370 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-15 23:02:32,373 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-15 23:02:32,374 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-15 23:02:32,374 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-15 23:02:32,378 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-15 23:02:32,378 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:02:32" (1/1) ... [2023-12-15 23:02:32,379 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a2199b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:02:32, skipping insertion in model container [2023-12-15 23:02:32,379 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:02:32" (1/1) ... [2023-12-15 23:02:32,404 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-15 23:02:32,518 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursified_loop-simple/recursified_deep-nested.c[1440,1453] [2023-12-15 23:02:32,542 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 23:02:32,549 INFO L202 MainTranslator]: Completed pre-run [2023-12-15 23:02:32,557 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursified_loop-simple/recursified_deep-nested.c[1440,1453] [2023-12-15 23:02:32,565 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 23:02:32,574 INFO L206 MainTranslator]: Completed translation [2023-12-15 23:02:32,574 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:02:32 WrapperNode [2023-12-15 23:02:32,575 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-15 23:02:32,575 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-15 23:02:32,575 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-15 23:02:32,575 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-15 23:02:32,580 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:02:32" (1/1) ... [2023-12-15 23:02:32,587 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:02:32" (1/1) ... [2023-12-15 23:02:32,598 INFO L138 Inliner]: procedures = 16, calls = 71, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 44 [2023-12-15 23:02:32,598 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-15 23:02:32,599 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-15 23:02:32,599 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-15 23:02:32,599 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-15 23:02:32,606 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:02:32" (1/1) ... [2023-12-15 23:02:32,606 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:02:32" (1/1) ... [2023-12-15 23:02:32,609 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:02:32" (1/1) ... [2023-12-15 23:02:32,622 INFO L175 MemorySlicer]: Split 38 memory accesses to 7 slices as follows [2, 7, 6, 5, 6, 6, 6]. 18 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0]. The 11 writes are split as follows [0, 1, 2, 2, 2, 2, 2]. [2023-12-15 23:02:32,623 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:02:32" (1/1) ... [2023-12-15 23:02:32,623 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:02:32" (1/1) ... [2023-12-15 23:02:32,631 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:02:32" (1/1) ... [2023-12-15 23:02:32,633 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:02:32" (1/1) ... [2023-12-15 23:02:32,635 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:02:32" (1/1) ... [2023-12-15 23:02:32,636 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:02:32" (1/1) ... [2023-12-15 23:02:32,640 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-15 23:02:32,641 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-15 23:02:32,641 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-15 23:02:32,641 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-15 23:02:32,642 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:02:32" (1/1) ... [2023-12-15 23:02:32,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 23:02:32,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 23:02:32,665 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) [2023-12-15 23:02:32,712 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 [2023-12-15 23:02:32,730 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_12_to_13_0 [2023-12-15 23:02:32,730 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_12_to_13_0 [2023-12-15 23:02:32,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-15 23:02:32,731 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_13_to_14_0 [2023-12-15 23:02:32,731 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_13_to_14_0 [2023-12-15 23:02:32,731 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_11_to_12_0 [2023-12-15 23:02:32,731 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_11_to_12_0 [2023-12-15 23:02:32,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-15 23:02:32,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-15 23:02:32,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-15 23:02:32,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-12-15 23:02:32,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-12-15 23:02:32,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-12-15 23:02:32,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-12-15 23:02:32,732 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_14_to_16_0 [2023-12-15 23:02:32,732 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_14_to_16_0 [2023-12-15 23:02:32,732 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_10_to_11_0 [2023-12-15 23:02:32,732 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_10_to_11_0 [2023-12-15 23:02:32,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-15 23:02:32,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-15 23:02:32,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-15 23:02:32,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-15 23:02:32,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-12-15 23:02:32,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-12-15 23:02:32,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-12-15 23:02:32,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2023-12-15 23:02:32,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-15 23:02:32,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-15 23:02:32,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-15 23:02:32,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-15 23:02:32,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-15 23:02:32,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-12-15 23:02:32,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-12-15 23:02:32,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-12-15 23:02:32,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2023-12-15 23:02:32,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-15 23:02:32,830 INFO L241 CfgBuilder]: Building ICFG [2023-12-15 23:02:32,831 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-15 23:02:33,038 INFO L282 CfgBuilder]: Performing block encoding [2023-12-15 23:02:33,069 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-15 23:02:33,069 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-15 23:02:33,070 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:02:33 BoogieIcfgContainer [2023-12-15 23:02:33,070 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-15 23:02:33,071 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-15 23:02:33,071 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-15 23:02:33,080 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-15 23:02:33,080 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:02:32" (1/3) ... [2023-12-15 23:02:33,080 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eb95d88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:02:33, skipping insertion in model container [2023-12-15 23:02:33,081 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:02:32" (2/3) ... [2023-12-15 23:02:33,081 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eb95d88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:02:33, skipping insertion in model container [2023-12-15 23:02:33,081 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:02:33" (3/3) ... [2023-12-15 23:02:33,082 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_deep-nested.c [2023-12-15 23:02:33,094 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-15 23:02:33,094 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-15 23:02:33,131 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-15 23:02:33,135 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;@46366261, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-15 23:02:33,135 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-15 23:02:33,138 INFO L276 IsEmpty]: Start isEmpty. Operand has 48 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 37 states have internal predecessors, (42), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-15 23:02:33,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-15 23:02:33,155 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:02:33,156 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] [2023-12-15 23:02:33,157 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:02:33,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:02:33,163 INFO L85 PathProgramCache]: Analyzing trace with hash 838024083, now seen corresponding path program 1 times [2023-12-15 23:02:33,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:02:33,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190820487] [2023-12-15 23:02:33,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:02:33,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:02:33,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:33,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 23:02:33,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:02:33,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190820487] [2023-12-15 23:02:33,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190820487] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 23:02:33,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 23:02:33,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-15 23:02:33,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351074324] [2023-12-15 23:02:33,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 23:02:33,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 23:02:33,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:02:33,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 23:02:33,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-15 23:02:33,599 INFO L87 Difference]: Start difference. First operand has 48 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 37 states have internal predecessors, (42), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:02:33,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:02:33,672 INFO L93 Difference]: Finished difference Result 102 states and 144 transitions. [2023-12-15 23:02:33,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-15 23:02:33,673 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-12-15 23:02:33,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:02:33,680 INFO L225 Difference]: With dead ends: 102 [2023-12-15 23:02:33,680 INFO L226 Difference]: Without dead ends: 52 [2023-12-15 23:02:33,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-15 23:02:33,685 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 12 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 23:02:33,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 164 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 23:02:33,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-12-15 23:02:33,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2023-12-15 23:02:33,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 36 states have internal predecessors, (40), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-15 23:02:33,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2023-12-15 23:02:33,711 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 25 [2023-12-15 23:02:33,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:02:33,712 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2023-12-15 23:02:33,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:02:33,712 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2023-12-15 23:02:33,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-15 23:02:33,715 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:02:33,715 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] [2023-12-15 23:02:33,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-15 23:02:33,715 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:02:33,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:02:33,716 INFO L85 PathProgramCache]: Analyzing trace with hash 839871125, now seen corresponding path program 1 times [2023-12-15 23:02:33,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:02:33,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063983738] [2023-12-15 23:02:33,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:02:33,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:02:33,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:33,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 23:02:33,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:02:33,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063983738] [2023-12-15 23:02:33,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063983738] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 23:02:33,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 23:02:33,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-15 23:02:33,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133146098] [2023-12-15 23:02:33,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 23:02:33,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 23:02:33,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:02:33,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 23:02:33,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-15 23:02:33,861 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:02:33,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:02:33,906 INFO L93 Difference]: Finished difference Result 94 states and 129 transitions. [2023-12-15 23:02:33,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-15 23:02:33,907 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-12-15 23:02:33,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:02:33,909 INFO L225 Difference]: With dead ends: 94 [2023-12-15 23:02:33,909 INFO L226 Difference]: Without dead ends: 50 [2023-12-15 23:02:33,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-15 23:02:33,913 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 3 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 23:02:33,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 151 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 23:02:33,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-12-15 23:02:33,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2023-12-15 23:02:33,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 39 states have internal predecessors, (43), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-15 23:02:33,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2023-12-15 23:02:33,928 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 25 [2023-12-15 23:02:33,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:02:33,929 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2023-12-15 23:02:33,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:02:33,929 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2023-12-15 23:02:33,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-15 23:02:33,930 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:02:33,931 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] [2023-12-15 23:02:33,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-15 23:02:33,931 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:02:33,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:02:33,932 INFO L85 PathProgramCache]: Analyzing trace with hash -936983279, now seen corresponding path program 1 times [2023-12-15 23:02:33,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:02:33,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597390655] [2023-12-15 23:02:33,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:02:33,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:02:34,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:34,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 23:02:34,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:02:34,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597390655] [2023-12-15 23:02:34,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597390655] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 23:02:34,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 23:02:34,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-12-15 23:02:34,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992415287] [2023-12-15 23:02:34,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 23:02:34,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-15 23:02:34,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:02:34,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-15 23:02:34,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2023-12-15 23:02:34,665 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 15 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:02:34,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:02:35,000 INFO L93 Difference]: Finished difference Result 71 states and 89 transitions. [2023-12-15 23:02:35,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-15 23:02:35,001 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-12-15 23:02:35,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:02:35,004 INFO L225 Difference]: With dead ends: 71 [2023-12-15 23:02:35,004 INFO L226 Difference]: Without dead ends: 69 [2023-12-15 23:02:35,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2023-12-15 23:02:35,009 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 55 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 23:02:35,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 373 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 23:02:35,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-12-15 23:02:35,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2023-12-15 23:02:35,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 44 states have (on average 1.3181818181818181) internal successors, (58), 49 states have internal predecessors, (58), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-12-15 23:02:35,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 77 transitions. [2023-12-15 23:02:35,026 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 77 transitions. Word has length 25 [2023-12-15 23:02:35,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:02:35,026 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 77 transitions. [2023-12-15 23:02:35,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:02:35,026 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 77 transitions. [2023-12-15 23:02:35,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-15 23:02:35,030 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:02:35,030 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-15 23:02:35,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-15 23:02:35,031 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:02:35,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:02:35,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1068024569, now seen corresponding path program 1 times [2023-12-15 23:02:35,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:02:35,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514310400] [2023-12-15 23:02:35,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:02:35,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:02:35,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:35,974 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 23:02:35,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:02:35,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514310400] [2023-12-15 23:02:35,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514310400] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 23:02:35,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470916852] [2023-12-15 23:02:35,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:02:35,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:02:35,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 23:02:35,986 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) [2023-12-15 23:02:36,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-15 23:02:36,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:36,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 91 conjunts are in the unsatisfiable core [2023-12-15 23:02:36,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 23:02:36,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-15 23:02:36,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-15 23:02:36,816 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-15 23:02:36,817 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 23:02:36,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470916852] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 23:02:36,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-15 23:02:36,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [15] total 30 [2023-12-15 23:02:36,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696397894] [2023-12-15 23:02:36,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 23:02:36,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-15 23:02:36,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:02:36,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-15 23:02:36,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=807, Unknown=0, NotChecked=0, Total=870 [2023-12-15 23:02:36,819 INFO L87 Difference]: Start difference. First operand 60 states and 77 transitions. Second operand has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:02:37,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:02:37,535 INFO L93 Difference]: Finished difference Result 192 states and 259 transitions. [2023-12-15 23:02:37,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-15 23:02:37,536 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-12-15 23:02:37,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:02:37,537 INFO L225 Difference]: With dead ends: 192 [2023-12-15 23:02:37,537 INFO L226 Difference]: Without dead ends: 134 [2023-12-15 23:02:37,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=113, Invalid=1369, Unknown=0, NotChecked=0, Total=1482 [2023-12-15 23:02:37,538 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 109 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-15 23:02:37,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 468 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-15 23:02:37,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-12-15 23:02:37,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 116. [2023-12-15 23:02:37,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 88 states have (on average 1.3181818181818181) internal successors, (116), 97 states have internal predecessors, (116), 17 states have call successors, (17), 12 states have call predecessors, (17), 10 states have return successors, (18), 13 states have call predecessors, (18), 15 states have call successors, (18) [2023-12-15 23:02:37,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 151 transitions. [2023-12-15 23:02:37,554 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 151 transitions. Word has length 37 [2023-12-15 23:02:37,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:02:37,554 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 151 transitions. [2023-12-15 23:02:37,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:02:37,555 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 151 transitions. [2023-12-15 23:02:37,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-15 23:02:37,556 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:02:37,557 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-15 23:02:37,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-15 23:02:37,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:02:37,773 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:02:37,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:02:37,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1330212595, now seen corresponding path program 1 times [2023-12-15 23:02:37,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:02:37,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395584770] [2023-12-15 23:02:37,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:02:37,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:02:37,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:38,678 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 23:02:38,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:02:38,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395584770] [2023-12-15 23:02:38,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395584770] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 23:02:38,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911006427] [2023-12-15 23:02:38,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:02:38,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:02:38,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 23:02:38,680 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) [2023-12-15 23:02:38,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-15 23:02:38,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:38,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 182 conjunts are in the unsatisfiable core [2023-12-15 23:02:38,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 23:02:38,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-15 23:02:38,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-15 23:02:39,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-15 23:02:39,987 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 23:02:39,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 23:02:40,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2023-12-15 23:02:40,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2023-12-15 23:02:40,409 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 23:02:40,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911006427] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 23:02:40,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 23:02:40,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 26, 11] total 47 [2023-12-15 23:02:40,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954742524] [2023-12-15 23:02:40,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 23:02:40,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-12-15 23:02:40,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:02:40,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-12-15 23:02:40,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1977, Unknown=0, NotChecked=0, Total=2162 [2023-12-15 23:02:40,414 INFO L87 Difference]: Start difference. First operand 116 states and 151 transitions. Second operand has 47 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 37 states have internal predecessors, (84), 11 states have call successors, (15), 11 states have call predecessors, (15), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:02:46,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:02:46,908 INFO L93 Difference]: Finished difference Result 572 states and 764 transitions. [2023-12-15 23:02:46,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2023-12-15 23:02:46,909 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 37 states have internal predecessors, (84), 11 states have call successors, (15), 11 states have call predecessors, (15), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-12-15 23:02:46,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:02:46,917 INFO L225 Difference]: With dead ends: 572 [2023-12-15 23:02:46,917 INFO L226 Difference]: Without dead ends: 461 [2023-12-15 23:02:46,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5257 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=2664, Invalid=17358, Unknown=0, NotChecked=0, Total=20022 [2023-12-15 23:02:46,940 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 813 mSDsluCounter, 937 mSDsCounter, 0 mSdLazyCounter, 2405 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 973 SdHoareTripleChecker+Invalid, 2534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 2405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-15 23:02:46,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [814 Valid, 973 Invalid, 2534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 2405 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-15 23:02:46,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2023-12-15 23:02:47,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 337. [2023-12-15 23:02:47,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 278 states have (on average 1.3021582733812949) internal successors, (362), 301 states have internal predecessors, (362), 32 states have call successors, (32), 27 states have call predecessors, (32), 26 states have return successors, (46), 23 states have call predecessors, (46), 30 states have call successors, (46) [2023-12-15 23:02:47,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 440 transitions. [2023-12-15 23:02:47,030 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 440 transitions. Word has length 37 [2023-12-15 23:02:47,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:02:47,033 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 440 transitions. [2023-12-15 23:02:47,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 37 states have internal predecessors, (84), 11 states have call successors, (15), 11 states have call predecessors, (15), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:02:47,034 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 440 transitions. [2023-12-15 23:02:47,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-15 23:02:47,035 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:02:47,035 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:02:47,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-15 23:02:47,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:02:47,235 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:02:47,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:02:47,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1609524601, now seen corresponding path program 1 times [2023-12-15 23:02:47,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:02:47,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705781663] [2023-12-15 23:02:47,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:02:47,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:02:47,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:47,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-15 23:02:47,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:47,897 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-15 23:02:47,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:02:47,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705781663] [2023-12-15 23:02:47,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705781663] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 23:02:47,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 23:02:47,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-12-15 23:02:47,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447585626] [2023-12-15 23:02:47,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 23:02:47,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-15 23:02:47,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:02:47,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-15 23:02:47,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2023-12-15 23:02:47,900 INFO L87 Difference]: Start difference. First operand 337 states and 440 transitions. Second operand has 15 states, 13 states have (on average 2.230769230769231) internal successors, (29), 9 states have internal predecessors, (29), 6 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-15 23:02:48,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:02:48,264 INFO L93 Difference]: Finished difference Result 709 states and 945 transitions. [2023-12-15 23:02:48,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-15 23:02:48,264 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.230769230769231) internal successors, (29), 9 states have internal predecessors, (29), 6 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2023-12-15 23:02:48,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:02:48,267 INFO L225 Difference]: With dead ends: 709 [2023-12-15 23:02:48,267 INFO L226 Difference]: Without dead ends: 367 [2023-12-15 23:02:48,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2023-12-15 23:02:48,269 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 74 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 23:02:48,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 318 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 23:02:48,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2023-12-15 23:02:48,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 347. [2023-12-15 23:02:48,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 283 states have (on average 1.2791519434628975) internal successors, (362), 301 states have internal predecessors, (362), 32 states have call successors, (32), 27 states have call predecessors, (32), 31 states have return successors, (52), 23 states have call predecessors, (52), 30 states have call successors, (52) [2023-12-15 23:02:48,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 446 transitions. [2023-12-15 23:02:48,291 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 446 transitions. Word has length 46 [2023-12-15 23:02:48,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:02:48,291 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 446 transitions. [2023-12-15 23:02:48,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.230769230769231) internal successors, (29), 9 states have internal predecessors, (29), 6 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-15 23:02:48,291 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 446 transitions. [2023-12-15 23:02:48,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-15 23:02:48,293 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:02:48,293 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2023-12-15 23:02:48,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-15 23:02:48,293 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:02:48,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:02:48,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1726804323, now seen corresponding path program 1 times [2023-12-15 23:02:48,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:02:48,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581226377] [2023-12-15 23:02:48,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:02:48,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:02:48,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:48,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-12-15 23:02:48,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:48,768 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-15 23:02:48,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:02:48,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581226377] [2023-12-15 23:02:48,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581226377] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 23:02:48,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 23:02:48,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-15 23:02:48,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172287253] [2023-12-15 23:02:48,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 23:02:48,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-15 23:02:48,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:02:48,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-15 23:02:48,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-12-15 23:02:48,770 INFO L87 Difference]: Start difference. First operand 347 states and 446 transitions. Second operand has 9 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-15 23:02:49,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:02:49,001 INFO L93 Difference]: Finished difference Result 486 states and 630 transitions. [2023-12-15 23:02:49,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-15 23:02:49,003 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2023-12-15 23:02:49,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:02:49,005 INFO L225 Difference]: With dead ends: 486 [2023-12-15 23:02:49,005 INFO L226 Difference]: Without dead ends: 357 [2023-12-15 23:02:49,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2023-12-15 23:02:49,005 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 32 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 23:02:49,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 73 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 23:02:49,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2023-12-15 23:02:49,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 353. [2023-12-15 23:02:49,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 286 states have (on average 1.2762237762237763) internal successors, (365), 304 states have internal predecessors, (365), 32 states have call successors, (32), 27 states have call predecessors, (32), 34 states have return successors, (55), 23 states have call predecessors, (55), 30 states have call successors, (55) [2023-12-15 23:02:49,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 452 transitions. [2023-12-15 23:02:49,025 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 452 transitions. Word has length 58 [2023-12-15 23:02:49,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:02:49,025 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 452 transitions. [2023-12-15 23:02:49,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-15 23:02:49,025 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 452 transitions. [2023-12-15 23:02:49,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-15 23:02:49,027 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:02:49,027 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 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] [2023-12-15 23:02:49,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-15 23:02:49,027 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:02:49,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:02:49,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1798254246, now seen corresponding path program 1 times [2023-12-15 23:02:49,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:02:49,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239907794] [2023-12-15 23:02:49,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:02:49,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:02:49,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:49,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-15 23:02:49,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:50,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-15 23:02:50,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:50,165 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 29 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-15 23:02:50,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:02:50,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239907794] [2023-12-15 23:02:50,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239907794] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 23:02:50,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002114485] [2023-12-15 23:02:50,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:02:50,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:02:50,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 23:02:50,167 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) [2023-12-15 23:02:50,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-15 23:02:50,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:50,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 739 conjuncts, 219 conjunts are in the unsatisfiable core [2023-12-15 23:02:50,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 23:02:50,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-15 23:02:50,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-15 23:02:50,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-15 23:02:51,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 Received shutdown request... [2023-12-15 23:03:45,782 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 23:03:45,808 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 23:03:46,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-15 23:03:46,983 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forcibly destroying the process [2023-12-15 23:03:46,993 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-15 23:03:46,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-15 23:03:46,993 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 61 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while executing Executor. [2023-12-15 23:03:46,996 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:03:46,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 137 [2023-12-15 23:03:47,000 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-15 23:03:47,005 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 11:03:47 BoogieIcfgContainer [2023-12-15 23:03:47,005 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-15 23:03:47,006 INFO L158 Benchmark]: Toolchain (without parser) took 74634.39ms. Allocated memory was 284.2MB in the beginning and 596.6MB in the end (delta: 312.5MB). Free memory was 235.1MB in the beginning and 235.8MB in the end (delta: -705.2kB). Peak memory consumption was 312.3MB. Max. memory is 8.0GB. [2023-12-15 23:03:47,006 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 208.7MB. Free memory is still 158.8MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-15 23:03:47,006 INFO L158 Benchmark]: CACSL2BoogieTranslator took 200.61ms. Allocated memory is still 284.2MB. Free memory was 234.9MB in the beginning and 222.8MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-12-15 23:03:47,006 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.96ms. Allocated memory is still 284.2MB. Free memory was 222.8MB in the beginning and 221.2MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-15 23:03:47,006 INFO L158 Benchmark]: Boogie Preprocessor took 41.76ms. Allocated memory is still 284.2MB. Free memory was 221.2MB in the beginning and 218.4MB in the end (delta: 2.9MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2023-12-15 23:03:47,006 INFO L158 Benchmark]: RCFGBuilder took 428.93ms. Allocated memory is still 284.2MB. Free memory was 218.1MB in the beginning and 245.8MB in the end (delta: -27.7MB). Peak memory consumption was 22.4MB. Max. memory is 8.0GB. [2023-12-15 23:03:47,007 INFO L158 Benchmark]: TraceAbstraction took 73934.28ms. Allocated memory was 284.2MB in the beginning and 596.6MB in the end (delta: 312.5MB). Free memory was 245.3MB in the beginning and 235.8MB in the end (delta: 9.4MB). Peak memory consumption was 321.4MB. Max. memory is 8.0GB. [2023-12-15 23:03:47,007 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 208.7MB. Free memory is still 158.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 200.61ms. Allocated memory is still 284.2MB. Free memory was 234.9MB in the beginning and 222.8MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 22.96ms. Allocated memory is still 284.2MB. Free memory was 222.8MB in the beginning and 221.2MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 41.76ms. Allocated memory is still 284.2MB. Free memory was 221.2MB in the beginning and 218.4MB in the end (delta: 2.9MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * RCFGBuilder took 428.93ms. Allocated memory is still 284.2MB. Free memory was 218.1MB in the beginning and 245.8MB in the end (delta: -27.7MB). Peak memory consumption was 22.4MB. Max. memory is 8.0GB. * TraceAbstraction took 73934.28ms. Allocated memory was 284.2MB in the beginning and 596.6MB in the end (delta: 312.5MB). Free memory was 245.3MB in the beginning and 235.8MB in the end (delta: 9.4MB). Peak memory consumption was 321.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 32]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 32). Cancelled while NwaCegarLoop was analyzing trace of length 61 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 48 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 73.9s, OverallIterations: 8, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 8.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1099 SdHoareTripleChecker+Valid, 2.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1098 mSDsluCounter, 2520 SdHoareTripleChecker+Invalid, 2.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2242 mSDsCounter, 250 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3763 IncrementalHoareTripleChecker+Invalid, 4013 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 250 mSolverCounterUnsat, 278 mSDtfsCounter, 3763 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 338 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5564 ImplicationChecksByTransitivity, 7.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=353occurred in iteration=7, InterpolantAutomatonStates: 185, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 7 MinimizatonAttempts, 182 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 5.8s InterpolantComputationTime, 327 NumberOfCodeBlocks, 327 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 354 ConstructedInterpolants, 0 QuantifiedInterpolants, 2888 SizeOfPredicates, 109 NumberOfNonLiveVariables, 1041 ConjunctsInSsa, 273 ConjunctsInUnsatCore, 10 InterpolantComputations, 6 PerfectInterpolantSequences, 73/104 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown